Atomic Mass

Topic Page

Questions

• How do you calculate the atomic mass of carbon?
• How are atomic mass and mass number different?
• How do you calculate atomic mass from isotopic composition ?
• How do atomic mass and atomic weight differ?
• How do atomic masses reflect isotope abundances?
• How do atomic masses vary throughout the periodic table?
• How much atomic mass is in hydrogen?
• What atomic mass does ekasilicon have?
• Why are atomic masses of most of the elements fractional?
• What is atomic mass?
• How do you calculate the atomic mass of carbon?
• How can I calculate the molar mass?
• Which is a better unit for expressing molar mass, amu or grams/mole?
• How is the atomic mass changed by gamma decay?
• How does the atomic mass change depending on the isotope?
• How does molar mass affect pressure?
• How does molar mass affect the freezing point?
• How does atomic mass affect density?
• How do you find the atomic mass of an element?
• What is the average atomic mass of bromine? One isotope of bromine has an atomic mass of 78.92amu and a relative abundance of 50.69%. The other major isotope of bromine has an atomic mass of 80.92amu and a relative abundance of 49.31%.
• How do you calculate the relative atomic mass of isotopes?
• How can the atomic mass be a decimal?
• There are three isotopes of silicon. They have mass numbers of 28, 29 and 30. The average atomic mass of silicon is 28.086amu. What does this say about the relative abundances of the three isotopes?
• How is the atomic mass measured?
• What is atomic mass?
• How does Avogadro's number relate to atomic mass?
• What is mass?
• Question #8eb47
• What is gram atomic mass?
• Question #15796
• Question #90983
• Gallium has an atomic mass of 69.723. The Ga-69 (68.926 amu) is 60.11%. What is the amu of the other isotope? I'd like to know the set up-thought it was (69.723)(0.6011) + (x)(0.3989)? But it isn't giving me the right answer.
• What is the molar Mass of Fe3+, how many ions does it have and what is the mass of ion in one mole of compound?
• Question #5ae01
• The element antimony has an atomic weight of 121.757 u and only two naturally occurring isotopes. One isotope has an abundance of 57.3% and an isotopic mass of 120.904 u. What is the mass of the other isotope?
• Question #cefc7
• Question #8ede8
• Question #6c787
• Question #320fe
• Question #09099
• Question #b220c
• Question #6f50c
• Suppose the amu had been defined as #1/10#th of the mass of a phosphorus atom. What would be the relative mass of carbon-12?
• Question #1d260
• What is the difference between atomic mass and atomic weight?
• Does the atomic volume rise with the increasing atomic mass?
• What does the atomic number represent?
• An atom of sodium has 11 protons, 11 electrons,and 12 neutrons, what is its atomic number and mass number?
• What is atomic number determined by?
• How is atomic number related to the number of protons and electrons?
• What does the atomic number represent?
• If an atom has an atomic number of 9 and an atomic mass number of 19, how many protons, neutrons, and electrons does it have?
• What atoms with the same atomic number but a different atomic mass.?
• When you subtract the atomic mass from the atomic number what do you get?
• What is the change in atomic mass number when an atom emits an alpha particle?
• Are atomic mass, formula mass, and molar mass the same thing?
• How do you find the average atomic mass?
• What is the unit of atomic mass?
• Titanium has 5 isotopes: Ti-46 (8.0%), Ti-47 (7.8%), Ti-48 (73.4%), Ti-49 (5.5%), and Ti-50 (5.3%), what is the average atomic mass of titanium?
• In atomic mass units, what is the mass of an electron?
• How does atomic mass relate to the unit "mole"?
• How do you identify the atomic number, atomic mass, number of protons, number of neutrons, and number of electrons in an element?
• How is the atomic mass number of an element determined from its isotopes?
• Given the relative abundance of the following naturally occurring isotopes of oxygen: O-16: 99.76%, O-17: 0.037%, and O-18: 0.204%, how would you calculate atomic mass?
• How would you find the average atomic mass of sulfur from the following data: S-32 95.002% (31.972), S-33 0.76% (32.971), S-34 4.22% (33.967), and S-36 0.014% (35.967)?
• What is the approximate mass of one water molecule?
• How would you find the relative atomic mass of magnesium if there is 1 atom of Mg-24 to every atom of Mg-25?
• Question #7a90e
• Question #0b468
• How would you find molar mass?
• How would you find atomic weight?
• What is the atomic mass of steel?
• What is the difference between atomic mass and atomic weight?
• What is the difference between atomic mass and molar mass?
• Are atomic mass and atomic weight the same thing?
• The atomic weight of magnesium is reported as 24.3amu, yet no atom of magnesium has the mass of 24.3amu, how can this be explained?
• What is the atomic mass of carbon dioxide?
• How would you determine the atomic weight of an atom?
• What is the atomic mass of SO4?
• How would you calculate the atomic mass of rubidium given the two isotopes of rubidium have atomic masses and relative abundances of 84.91 amu (72.16%) and 86.91 amu (27.84%)?
• Elemental exonium (not a real element) consists of two major isotopes with relative abundances of81% 99 amu and 19% 114 amu, what is the atomic weight for exonium?
• The atomic weight of a newly discovered element is 10.600 amu. It has two naturally occurring isotopes. One has a mass of 10.000 amu and a natural abundance of 70.000%. What is the isotopic mass of the other isotope?
• What does the atomic mass tell you?
• The atomic weight of aluminum is 26.982 u, how many aluminum atoms are there in a 4.55g sample of aluminum?
• A 53.000g sample of silver is found to consist of 27.475g of 107Ag and 25.525g of 109Ag. How would you calculate the average atomic mass of silver?
• What is the molar mass of aluminum?
• What does it mean if atoms have the same atomic number but a different atomic mass?
• What is an atomic mass of NaOH ?
• The atomic weight of phosphorus is 30.974 u. What is the mass of a phosphorus sample which contains 0.585 moles of phosphorus atoms?
• How would you find atomic mass?
• Argon atoms have a mass number of 40, but a relative atomic mass of 39.948 why is this so?
• Question #0c82b
• What is the molecular weight of the acetic acid #(CH_3CO_2H)#, rounded to the nearest integer?
• What is the nuclear binding energy of one lithium-6 atom with a measured atomic mass of 6.015 amu?
• What is the average atomic mass of gold if half of the gold found in nature has a mass of 197 amu and half has a mass of 198 amu?
• What is the average atomic mass of gold if half of the gold found in nature has a mass of 197 amu and half has a mass of 198 amu?
• An average sample of chlorine contains 75.77% chlorine-35, with an atomic mass of 34.969 amu (atomic mass units), and 24.23% chlorine-37, with an atomic mass of 36.966 amu. What is the average atomic mass of chlorine?
• What is the molar mass of methane, #CH_4#?
• What is the molar mass of magnesium?
• What is the molar mass of #CH_4#?
• What two particles account for almost all of the mass of an atom?
• What is the unit for molecular weight?
• What is the difference between molecular weight and formula weight?
• What is the relationship between molecular weight and rate of diffusion?
• What is the relationship between density and molecular weight of a substance?
• How does molecular weight affect the rate of diffusion?
• What is the approximate molecular weight of hemoglobin?
• What is the molecular weight of SO4?
• What is the relative molecular weight of #"H"_2"SO"_4# ?
• What is the difference between molar mass and molecular mass?
• What is the difference between molecular mass and formula mass?
• The molecular formula of lithium carbonate is Li2CO3. What is the molecular weight of this drug?
• The molecular formula of calcium chloride is CaCl2. What is the molecular weight of this drug?
• What is the molecular weight of sulfuric acid?
• What is the average atomic mass of silver if 13 out of 25 atoms are silver-107 and 12 out of 25 atoms are silver-109?
• How would you calculate the average atomic mass of copper if 69.2% of copper has a mass of 62.93 amu and 30.8% has a mass of 64.93 amu?
• How would you define atomic number and mass number ?
• Why is the number of electrons not included in the atomic mass?
• What is the atomic mass of NaOH ?
• Why does magnesium have an atomic mass of 24.3 instead of 24 or 25?
• How many grams are in one atomic mass unit?
• What is the atomic mass of lithium if 7.42% of its atoms have the mass of 6.02amu and 92.58% of its atoms have the mass of 7.02amu?
• What is 1 atomic mass unit equal to?
• What happens to the atomic mass as you go across a period?
• What is the atomic mass of aluminum?
• What is the average atomic mass of lithium?
• The atomic mass of Cl is 35.45 amu and the atomic mass of Al is 26.98 amu. What are the masses in grams of 4.000 mol of Al atoms and of 4.000 mol of Cl atoms?
• Why is the atomic mass of an element an average mass?
• An element has two naturally occurring isompes widx atomic masses of 10.01 amu and 11.01 amu. The relative abundances of these elements are 19.8% and 80.2%, respectively. What is the average atomic mass of the element?
• Question #f536b
• The element carbon has 3 naturally occurring isotopes. About 99% of carbon isotopes are C-12, about 1% are C-13 and a tiny amount are C-14. What is the average atomic mass of carbon atoms?
• How many protons are in the nucleus of an atom of oxygen?
• What is the molecular weight of #NaOH#?
• What is the molecular weight of #H_3PO_4#?
• How do you find the mass of an atom?
• What information do you need to calculate the average atomic mass for an element?
• Why is the atomic mass of chlorine quoted on the Periodic Table NON-INTEGRAL?
• What is the mass of 1 mole of Barium acetate, #Ba(C_2H_3O_2)_2#?
• What is the mass (in grams) of 8.34 moles calcium acetate?
• What is the molar mass of #Ca_5(PO_4)_3(OH)#?
• What is the molar mass of #(NH_2)_2CO#?
• A Nitrogen atom with 7 protons and 8 neutrons has a mass number of 15 amu. However on the periodic table, the atomic mass for Nitrogen is 14.01. How is this possible?
• Question #50a44
• What is the molar mass of #(NH_4)_2SO_4#?
• What is the molar mass of #Fe_3(PO_4)_2#?
• How does the #Z#, #"atomic number"# relate to atomic structure?
• Question #8a2b4
• Rubidium is a soft, silvery-white metal that has two common isotopes, #""^85Rb# and #""^87Rb#. If the abundance of #""^85Rb# is 72.2% and the abundance of #""^87Rb# is 27.8%, what is the average atomic mass of rubidium?
• What is a #"mole"#?
• Two isotopes of copper are naturally occurring, with #""_29^63Cu# at 69.09% (62.93 amu) and #""_29^65Cu# at 30.91% (64.93 amu). What is the atomic mass of copper?
• What is the average atomic mass for the mixture that is 75% #""^133Cs#, 20% #""^132Cs#, 5% #""^134Cs#?
• What is the relative weight of carbon?
• An atom with two protons, three neutrons and two electrons would have a a mass of about how many atomic mass units?
• What is the formula mass of sodium chloride?
• What is the formula mass of nitric acid?
• What is the atomic mass of silver?
• What is the formula mass of methylene chloride #CH_4Cl_2#?
• Question #b87de
• Question #98436
• What is the atomic mass of hafnium if, out of every 100 atoms, 5 have a mass of 176, 19 have a mass of 177, 27 have mass of 178, 14 have a mass of 179, and 35 have a mass of a 180?
• Hydrogen is 99% #""^1H#, 0.8% #""^2 H#, and 0.2% #""^3 H#. What is its average atomic mass?
• Why is the atomic weight of bromine listed on the periodic table not a whole number?
• What is the formula mass of beryllium chlorate, #Be(ClO_3)_2#, in atomic mass units?
• Question #7c69f
• Which sample has the greatest mass? (multiple choice)
• Question #cbcb6
• What is the formula mass for #Al_2(C_2O_4)_3#?
• What is the formula mass for sulfur dioxide?
• What is the formula mass for sulfuric acid?
• How do I calculate average atomic mass?
• What is the molar mass of calcium bromide?
• Question #a4544
• What is the gram-formula mass of #(NH_4)_3PO_4#?
• What is the molar mass of #H_2CO_3#?
• What is the molar mass of Tin (II) Phosphate?
• What is the molar mass of ammonium carbonate?
• What is the molecular weight of #As_2(SO_4)_3#?
• What is the molar mass of #H_3PO_4#?
• What is the formula of titanium(II) oxide?
• What is the molar mass of sodium phosphate?
• How do I work out a formula or molecular mass?
• How many grams does .501 moles of #CuBr_2# weigh?
• What is the molar mass of #AuCl_3#?
• Question #9e257
• What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons?
• What is the molar mass of #CdI_2#?
• Question #4c34a
• If 1 mole of an unknown metal has mass of 63.55 grams, what metal is it?
• What is the mass in grams of one mole of the element containing 12 protons?
• What is the mass of one mole of #CO_2#?
• What is the molar mass of #Na_2SO_4#?
• Question #cc97c
• Thallium consists of 29.5% TI-203 and 70.5% TI-205. What is the relative atomic mass of thallium?
• What is the molar mass of magnesium nitride, #"Mg"_3"N"_2#, if the mass of one mole of magnesium is 24.31 g and of one mole of nitrogen is 14.01 g?
• The atomic mass of carbon is 12.01, hydrogen is 1.01, and oxygen is 16.00. What is the molar mass of glucose #C_6H_12O_6#?
• An imaginary element Y occurs 30% of the time with a mass of 57.9 a.m.u. The remaining sample of Y has a mass of 60.9 a.m.u. What is the average atomic mass of Y?
• If #1000000# silver atoms weigh #1.79 xx 10^(-16) "g"#, what is the atomic mass of silver?
• What is the isotopic abundance of #""^25Mg#?
• How do you calculate the gram formula mass of #NO_2#?
• What is the mass of one mole of #(NH_2)_3PO_4#?
• What is the molar mass of copper (ll) sulfate?
• Why is the mass of a carbon atom greater than the total mass of its protons and electrons?
• What is the number of sulfur atoms that equal a mass of 32.07 amu?
• What is the mass in grams of a single atom of silver?
• What is the molar mass of nitroglycerin, #C_3H_5O_3(NO_2)_3#?
• What is the molar mass of aspirin, #C_9H_8O_4#?
• What is the molar mass of beryllium oxide?
• What is the molecular mass of #C_3H_4O_3#?
• What is the molar mass of carbon tetrachloride?
• What is the molar mass of #Al(NO_3)_3#?
• Which isotopes of aluminum are radioactive?
• Does the mass of an isotope directly relate to the molar mass of the atom?
• Question #0a578
• What is the molar mass of sodium hydroxide?
• What is the formula mass of #HNO_3#?
• The atomic mass of potassium is 39.1. What is the mass of #6.02 * 10^23# atoms of potassium?
• What is the molecular mass of #NH_3#?
• Question #6f0e8
• Question #218f2
• What is the molar mass of #Al_2(SO_4)_3#?
• What is the molecular weight of air?
• How do you find molecular weight?
• How do you calculate molecular weight?
• How can you calculate molecular weight?
• How do you calculate molecular weight of a gas?
• How do you find molecular weight of an element?
• How does molecular weight affect boiling point?
• How does molecular weight affect diffusion?
• How does molecular weight affect freezing point?
• How does molecular weight affect vapor pressure?
• How does molecular weight effect glass transition temperature?
• How is molecular weight related to intermolecular forces?
• How do you calculate molecular weight of DNA?
• How would you calculate the molecular weight of a protein?
• How would you find the molecular weight of an unknown gas?
• What is molecular weight in chemistry?
• What is molecular weight measured in?
• What is the molecular weight of oxygen?
• What is the molar mass of sodium oxygen oxalate #Na_2C_2O_4#?
• Why is atomic mass in parentheses?
• What is the molar mass of magnesium phosphate?
• What is the molar mass of #Fe_2O_3#?
• How can you find formula mass?
• What is the formula mass of ammonium carbonate (#(NH_4)_2CO_3#)?
• What is the gram formula mass of #Ca(OH)_2#?
• What is the formula for mass in chemistry?
• How do you calculate the formula mass for each of the following compounds? (a) #C_6H_12O_6# (b) #Fe(NO_3)_3#?
• How do you calculate the formula mass of aluminum carbonate?
• Is formula mass measured in atomic mass units (amu)?
• What is the molar mass of ammonium sulfate?
• What is formula mass and how is it calculated?
• What is the formula mass of water?
• What is a formula mass example?
• How can you determine formula mass?
• How do you find formula mass?
• How do you find formula mass of a compound?
• How do you calculate formula mass of a compound?
• What is the molar mass of 1-butene?
• What is the molar mass of #CaSO_4#?
• Given an element, why don't ALL the atoms of this element have the same mass?
• What is the molar mass of #SO_3#?
• What is the molar mass of #Ca_3(PO_4)_2#?
• What percent of deuterated water is contained in a sample that has an average relative molecular mass of #"19 g/mol"# and consists of some #"H"_2""^(16)"O"# and some #"D"_2""^(16)"O"#?
• An element has 43 protons and 50 neutrons. What is the atomic mass of this element?
• Why is the atomic mass of an element not a whole number?
• Question #32a90
• How do you find the molar mass of argon?
• What is the atomic mass of calcium?
• What is the atomic mass of calcium chloride?
• What is the atomic mass of calcium nitrate?
• What is the atomic mass of calcium sulfate?
• What is calcium nitrate's atomic mass?
• What is the molar mass of calcium?
• What is the atomic mass of calcium carbonate?
• What is the molar mass of calcium hydroxide?
• What is the atomic mass of calcium phosphate?
• How do you find the atomic mass of calcium?
• What the molar mass of calcium phosphate?
• How do you find the molar mass of #"Fe"_2"O"_3#?
• How do you determine the molar mass of #Fe_2O_3#?
• What is the molar mass of #Fe_2O_3# (rust)?
• What is the molar mass of #Fe_2O_3#, #4H_2O#?
• How do you calculate the molar mass of #Fe_2O_3#?
• What is the molar mass of helium?
• What is the molar mass of helium gas?
• What is the molar mass of helium in kg/mol?
• What is the molar mass of hematite?
• What is the molar mass of hemoglobin?
• What is the molar mass of heptane?
• What is the molar mass of hexane?
• What is the molar mass of hexanol?
• How do you determine the molar mass of #He#?
• How do you determine the molar mass of helium?
• How do you calculate the molar mass of hexane?
• How does molar mass affect entropy?
• How does molar mass affect melting point?
• How do you calculate the molar mass of heavy water?
• How do you find the molar mass of sulfur hexafluoride?
• What is the molar mass of helium gas in g/mol?
• What is the molecular mass of heavy water?
• What is the molar mass of heavy water #"D"_2"O"#?
• How do you find the molar mass of hematite?
• What is the molar mass of hemocyanin?
• How do you determine the molar mass of heptane?
• What is the atomic mass of carbon?
• Why is there an atomic mass unit?
• Why is atomic mass a decimal?
• Why is atomic mass an average?
• Why is atomic mass relative?
• How would you explain an atomic mass number?
• How is atomic mass determined?
• How can an atomic mass not be a whole number?
• How can an average atomic mass be calculated?
• How can the atomic mass be found?
• How can you determine atomic mass?
• How do you calculate the atomic mass of magnesium?
• How do you calculate relative atomic mass of an element?
• How do you calculate the atomic mass of a compound?
• How do you calculate the atomic mass of copper?
• How do you find the atomic mass number of phosphate?
• Does atomic mass affect density?
• How does atomic mass change in the periodic table?
• If xenon has an atomic number of 54 and a mass number of 108, how many neutrons does it have?
• What is the molar mass of lactic acid, #C_3H_6O_3#?
• Question #d90c6
• How do you calculate the formula mass of #C_5H_12#?
• What is the molar mass of nobelium?
• An atom of aluminum has an atomic number of 13 and a mass number of 27. How many neutrons does it have?
• What is the molar mass of copper(l) nitrate, #Cu(NO_3)_2#?
• Question #a81ec
• What is the mass of one mole of carbon-12 atoms?
• Question #1a9d7
• Which is the molar mass of #BF_3#?
• How do you determine the molar mass of #BF_3#?
• What is the molar mass of #NH_3#?
• What is the molar mass of lead (II) chloride (#PbCl_2#)?
• What is the molar mass of acetic acid (#CH_3COOH#)?
• What is the molar mass of the isotope strontium-87 (#""^(87) Sr#)?
• The molar mass of barium nitrate (#Ba(NO_3)_2#) is 261.35 g/mol. What is the mass of #5.30 x 10^22# formula units of #Ba(NO_3)_2#?
• What is the relative formula mass of #(NH_4)_3PO_4#?
• What is the average atomic mass of an element if, out of 100 atoms, 5 have a mass of 176 amu, 19 have a mass of 177 amu, 27 have a mass of 178 amu, 14 have a mass of 179 amu, and 35 have a mass of 180 amu?
• What is the difference betweet molecular mass (Mr) and molar mass (M)?
• Question #c5811
• The atomic weight of an atom is determined by the number of what?
• What is the mass of 19.42 atoms of F?
• The ratio for an mass-to-charge electron is #5.64 x 10^(-12)# kg/C. In another experiment, using Millikan's oil drop apparatus, the found the charge on the electron is #1.605 x 10^(-19)# C. What would be the mass of the electron, according to these data?
• What is the mass of 15ml of water?
• How do you calculate the mass, in g, of 29.6 mL f mercury (Hg) if the density of mercury is 13.6 g/ml?
• An element has a weight of 131.3. What is the reason the number is not a whole number?
• The concentration of carbon monoxide in an urban apartment is 48 #mu#g/#m^3#. What mass of carbon monoxide in grams is present in a room measuring 10.6 ft X 14.8 ft X 20.5 ft?
• Platinum metal is used in jewelry; it is also used in automobile catalytic converters. What is the mass of a cube of platinum 4.40 cm on an edge? The density of platinum is 21.4 g/cm^3?
• If the coal is burned in a power plant that uses 2000 tons of coal per day, what mass of calcium oxide is required daily to eliminate the sulfur dioxide? How many grams of calcium sulfite are produced daily by this power plant?
• Why is an element's atomic number always a round number, whereas its atomic mass often is not?
• Question #99ed9
• What is the molar mass of calcium chloride (#CaCl_2#)?
• What is the unit used to describe molar mass?
• What is the molar mass of iron (III) oxide (#Fe_2O_3#)?
• The elements A and Z combine to produce two different compounds: #A_2Z_3# and #AZ_2#. If 0.15 mole of #A_2Z_3# has a mass of 15.9 g and 0.15 mole of #AZ_2# has a mass of 9.3 g, what are the atomic masses of A and Z?
• Sodium hypochlorite (#NaClO#) is the active ingredient in household bleach. What is the formula mass of sodium hypochlorite?
• What is the average atomic mass of silicon?
• How do you calculate the average atomic mass of magnesium, given the following percent abundances and isotopic masses: #78.99% .^24Mg (23.98504 u)#, #10.00% .^25Mg (24.98584 u)#, and #11.01% .^20Mg (25.98259 u)#?
• Rubidium has two common isotopes, #""^85"Rb"# and #""^87"Rb"#. If the abundance of #""^85"Rb"# is 72.2% and the abundance of #""^87"Rb"# is 27.8%, what is the average atomic mass of rubidium?
• 2. The element copper has naturally occurring isotopes with mass numbers of 63 and 65. The relative abundance and atomic masses are 69.2% for a mass of 62.93 amu and 30.8% for a mass of 64.93 amu. How do you calculate the average atomic mass of copper?
• How do you calculate the mass percentage of different constituent elements in urea?
• Fluorite, a mineral of calcium, is a compound of the metal with fluorine. Analysis shows that a 18.66 g sample of fuorite contains 9.590 g of calcium. How do you calculate the mass of fluorine in the sample?
• Question #fee3e
• How do you calculate the molar mass of each of the following compounds?
• What is the atomic mass of magnesium?
• What is the atomic mass of Mg?
• What is the atomic mass of manganese?
• What is the atomic mass of Mn?
• What is the atomic mass of C?
• What is the atomic mass of nitrogen?
• What is the atomic mass of K?
• What is the atomic mass of neon?
• Magnesium has three naturally occurring isotopes with masses of 23.99 amu, 24.99 amu, and 25.98 amu and natural abundances of 78.99%, 10.00% and 11.01% respectively. How do you calculate the atomic mass of magnesium?
• Silver has two naturally occurring isotopes. Ag- 107 with a mass of 106.905 amu and a natural abundance of 51.84 % and Ag-109. How do you use the atomic mass of silver listed in the periodic table to determine the mass of Ag-109?
• Which element in period 2 has the most mass?
• How would you use the mass spectrum of rubidium to determine the atomic mass of rubidium?
• How do you find the atomic mass of Si-30?
• What is the molar mass of #CCl_4#?
• Question #1740d
• Why are the atomic masses printed on the Periodic Table not whole numbers?
• How do you determine the atomic mass of an element?
• Why is it necessary to use the average atomic mass of all isotopes, rather than the mass of the most commonly occurring isotope, when referring to the atomic mass of an element?
• The density of silver (Ag) is 10.5000 g/cm^3. How do you find of Ag that occupies 965 cm^3 of space?
• The atomic weight of Ga is 69.72 amu. There are only two naturally occurring isotopes of gallium: #"^69Ga# with a weight of 69.0 amu, and #"^71Ga# with a weight of 71.0 amu. What is approximate natural abundance of the #"^71Ga# isotope?
• The ratio of the atoms of isotope-80 and isotope-100 are 6 to 5. What is the average atomic mass of the element?
• What is the mass (g) of 0.95 mol of the element bromine (Br)?
• How do you find relative atomic mass?
• What is an atom's atomlc mass best described as?
• If 45.5 mL of 0.150 M sodium sulfate solution reacts completely with aqueous barium nitrate, what is the mass of #BaSO_4# (233.40 g/mol) precipitate? #Ba(NO_3)_2(aq) + Na_2SO4 (aq) -> BaSO_4(s) + 2NaNO_3(aq)#?
• If an Alka-Seltzer tablet contained 309 mg of aspirin, #1.927 xx 10^03# mg of sodium hydrogen carbonate, and #1.004 xx 10^03#mg of citric acid and nothing else, what is the percent, by mass, of sodium hydrogen carbonate in the tablet?
• Where is the mass of an atom found? Expain.
• Naturally occurring boron is 80.20% boron-11 (atomic mass of 11.01 amu) and 19.80% of some other isotopic form of boron. What must the atomic mass of this second isotope be in order to account for the 10.81 a average atomic mass of boron?
• What gives an elemental atom its weight?
• In a sample of silver, 51.84% of the atoms have a mass of 106.905 amu and 48.16% mass of 108.905 amu. What is the atomic mass of silver?
• The relative molecular mass of methane, #CH_4# is 16.043. What is the relative molecular mas of ethane, #C _6H_6? (C = 12.011)
• Question #08fd0
• What is the atomic mass of iridium?
• Question #7da3f
• Question #a254f
• What is the molar mass of barium chloride, #BaCl_2#?
• If an average atom of sulfur weighs 32.07 many sulfur atoms are contained in sample with mass 8274 amu? What is the mass of #5.213 x 10^24# sulfur atoms?
• How do you calculate the mass of tin oxide?
• According to the periodic table, which two elements have an atomic mass less than twice their atomic number?
• The recommended daily dose of calcium is 1200 mg. Calcium supplements often use calcium carbonate, #CaCO_3#, as the source of calcium. What mass of #CaCO_3# should be used in a tablet so that one tablet provides the recommended daily dose of calcium?
• When the mass of the boron atom is calculated, the mass of the electrons is ignored. Why is the mass of the electrons ignored?
• A sample of copper (Cu) contains 69.17% Cu-63. The remaining copper atoms are Cu-65. What is the average atomic mass of copper?
• Isotope: 35 AMU: 34.968852 % Abundance: 75.77; Isotope: 37 AMU: 36.965903 % Abundance: 24.23 The two isotopes for Cl are chlorine-35 and chlorine-37. What is the average mass for Cl up to 4 decimal places?
• Keeping #n# and #T# constant, how do I prove that #P prop 1/V#? What about keeping #n# and #P# constant and showing that #V prop T#?
• On the periodic table, how is atomic mass represented?
• If a sulfur atom has 16 protons, 16 electrons, and 16 neutrons, what is its atomic mass?
• How do you calculate the relative formula mass (M) of calcium carbonate? Relative atomic masses C = 12, O = 16, Ca = 40?
• The formula for the chemical compound magnesium sulphate is #"MgSO"_4#. How do you calculate the relative formula mass (M) of this compound?
• Magnesium reacts with hydrochloric acid according to the following equation: #Mg(s) + 2HCl(aq) -> MgCl_2(aq) +H_2(g)#. What mass of hydrogen will be obtained if 100 #cm^3# of 2.00 mol #dm^-3# HCl are added to 4.86 g of magnesium?
• What is the molecular weight of chloroform if 0.0275 mol weighs 3.28 g?
• A sample of a substance containing only magnesium and chlorine was tested in the laboratory and was found to be composed of 74.5% chlorine by mass. If the total mass of the sample was 190.2 grams, what was the mass of the magnesium?
• Do isotopes that have the same atomic number have the same atomic mass?
• Question #a535f
• What is the mass of two moles of oxygen atoms (atomic mass 16 amu)?
• As the atomic masses of the elements in the periodic table increase, what happens to the number of atoms in 1 mol of each element?
• What is the molar mass of #NaNO_3#?
• What is the molar mass of #Li_2SO_4#?
• What is the mass of oxygen in dimethylsulfoxide (#C_2H6SO#) rounded to three significant figures?
• Question #c8f01
• What is the molar mass of table salt (i.e. sodium chloride)?
• What is the mass of #2.30 x 10^24# formula units of magnesium chloride?
• What is the molar mass of #Pb(SO_4)_2#? How is this value calculated?
• What is the theoretical mass of water produced from ten moles of #NaHCO_3#?
• What is the molar mass of #K_2Cr_2O_2#?
• Are the mass of two moles of potassium dichromate 2942 g?
• =What particular isotope is the basis for defining the atomic mass unit and the mole?
• The relative atomic masses of nickel cobalt, iron are 58.70, 58.9332, and 55.847, respectively, which element has the greatest mass? The least mass?
• What is the mass, in kg, of 14.0 L of gasoline? (Density 0.680g/#cm^3#)?
• What is the mass of neutrons?
• What is the mass of electrons?
• How do you determine molar mass?
• Question #08e47
• What is the difference between mass number and atomic mass?
• How do you calculate molar mass? For example, what is the molar mass of #Cu(NH_4)_4SO_4#?
• The atomic mass of element A is 63.6 atomic mass units. The only naturally occurring isotopes of element A are A-63 and A-65. What is the percent abundance in a naturally occurring sample of element A closest to?
• What depends on the mass of the substance?
• What is the formula weight of #CuSO_4#?
• What is the formula weight?
• What is the formula mass for #Sr(NO_3)_2#?
• What is the gram formula mass of #Mg_3(PO_4)_2#?
• What is the molar mass of copper (II) chloride?
• What is the gram formula mass of #Al_2(SO_4)_3#?
• An unknown mass of pentanitrogen dioxide contains #1.465X10^24# nitrogen atoms. What is the mass of the pentanitrogen dioxide?
• What is the gram formula mass of #KCl#?
• What is the gram formula mass of #KMnO_4#?
• Question #821ee
• What is the atomic mass of #""^6Li#, if the atomic mass of lithium is 6.941 amu, and #""^7Li# is 92.58% abundant and weighs 7.015 amu?
• How do you use a periodic table to determine the mass of 1 mol of nitrogen gas molecules?
• How do you calculate relative formula mass?
• How do you calculate the molar mass of vitamin A?
• What is the molar mass of iron?
• What is the value of the atomic mass of an atom?
• What is the unit mass of an atom on the periodic table?
• What is the atomic mass of barium due to?
• What does the atomic mass describe?
• What is the mass of an element that has 10 protons, 22 neutrons, and 10 electrons?
• What is the percent by mass of carbon in #CO_2# equal to?
• To find the atomic mass of a particular atom what do you need to know?
• What is the formula weight of #Mg(BrO_4)_2#?
• What is the mass of oxygen in 250 g of sulfuric acid #H_2SO_4#?
• How do you find the mass number and atomic number?
• We know that 99.985% of all hydrogen atoms are hydrogen-1. Only 0.015% are hydrogen-2 atom What is the approximate atomic mass of hydrogen?
• What is a unified atomic mass unit? How is it equivalent to 1 g/mol?
• What is the total mass of #3.01 x 10^23# atoms of helium gas?
• Sulphur burns in air to form sulphur dioxide: #S + O_2 -> SO_2#. What is the mass of sulphur that must be burned to produce 64g of sulphur dioxide?
• The element rubidium (symbol Rb) contains two isotopes, #"^85Ru# and #"^87Ru#, with percentage abundance of 72% and 28% respectively. What is the relative atomic mass (#A_r#) of B?
• What is the percent by mass of oxygen in #Mg(NO_3)_2#?
• How do you calculate the molar masses of the following atmospheric molecules: #CO# and #N_2O#?
• How do find elemental masses?
• What is the mass in grams of #5.56 X 10^22# lead atoms?
• If 558 kg of powdered iron react with powdered sulfur to produce 879 kg of iron sulfide, what is the mass of reacting sulfur?
• Interpret the following equation using moles, molecules, volumes (assume STP). How would the mass of the reactants compare to the mass of the product? #2N_2(g) + 3O_2(g) -> 2N_2O_3(g)#?
• What is the molar mass of sulfuric acid?
• What is the difference between the mass of an isotope and the atomic mass of an element?
• What makes up most of the mass of a Calcium atom?
• If one mole of carbon-12 (#"^12C#) atoms was weighed, what would it have a mass of?
• What does the atomic mass given on the periodic table represent?
• What is the molar mass of #Sr(NO_2)_2#?
• Based on the data table below, which shows three isotopes of neon, what is a correct numerical setup for calculating the average atomic mass of neon?
• The table below gives information about two isotopes of element X. How would you calculate the average atomic mass of element X?
• How do we find the formula mass of #"chromic sulfite"#, #Cr_2(SO_3)_3#?
• What is the difference between molecular mass and formula unit mass?
• Question #1148f
• How to find the relative atomic mass?
• Question #7b209
• How do you find the atomic mass of magnesium?
• In the reaction #P_4 + 5O_2 -> PO_4O_10#, 7.75 g #P_4# reacts. How do you calculate the mass of #P_4O_10# produced?
• The mass of a hydrogen atom is 1.0 amu, and the mass of a carbon atom is 12.0 amu. What is the moiar mass of methane, #CH_4#?
• What is the mass of 7.50 moles of sulfur dloxide (#SO_2#)?
• What is the relationship between atomic mass and mass number?
• Question #d7677
• What are the components of the #""^(12)C# atom?
• Question #7e2b4
• Question #b9c49
• What are the isotopes of sulfur?
• What is the formula mass of 2-pentanol, #C_5H_12O#?
• How does formula mass differ from atomic mass?
• What are the atomic masses appearing in the periodic table?
• What is the molar mass of any substance defined as?
• What is the formula mass of 2-butene, #C_4H_8#?
• How do you determine the formula weight of #"Na"_2"CO"_3"# and #"Ca"_3("PO"_4)_2"#?
• How would you the mass in grams of #4.52 xx10^-3# #"C"_20"H"_42"#? Use the molar masses: C = 12.0 g/mole; H = 1.0 g/mol.
• A chemist obtains 2.50 moles of sodium nitrate (#NaNO_3#). What is the mass of this sample?
• Calcium oxide, or lime, is produced by the thermal decomposition of limestone in the following reaction. What mass of lime can be produced from #1.5 x 10^3# kg of limestone?
• How do you calculate the molar mass of rutile, #TiO_2# a mineral used in coloring glass?
• How do you calculate the average atomic mass of carbon if 98.90% of the atoms are C-12 (12.000000 and 1.100% are C-13 atoms (13.003354 amu)?
• How do you calculate the average atomic mass of rubidium if 72.17% of its atoms have a mass of 84.91 amu and 27.83% of its atoms have a mass of 86.91 amu?
• What is the weighted average mass of chlorine?
• What is the atomic mass of Au?
• Question #4b6b1
• Question #ca4d9
• How do we determine the number of neutrons given #Z#, and a #"mass number"#?
• What is the mass of 0.0914 moles of ammonium sulfate?
• What is the molar mass of sulfuric acid #H_2SO_4#?
• Question #9b865
• How do you calculate the atomic mass of element X if there are two isotopes of this element (x-24 and x-28) and 75% of all x atoms are x-28 isotopes?
• Given a #60*"amu"# mass of carbon atoms, how many carbon atoms are there?
• Question #fc34e
• Question #c0c86
• Question #b3240
• An element #"E"# reacts with oxygen to form an oxide #"E"_2"O"#. What is its relative atomic mass if 6.9 g of the element reacts with water to form #"1800 cm"^3# of hydrogen?
• How would dichromate ion, #Cr_2O_7^(2-)#, oxidize sulfide ion, #S^(2-)#, to give elemental sulfur? The reduction product is #Cr^(2+)#.
• What is the mass of ONE water molecule?
• Question #94b00
• How would you calculate the average atomic mass of element,X, if a sample of X is 22.50% x-37 and 77.50% x-35.?
• Question #578ec
• What is chromium's molecular weight?
• What element has a molar mass of #"5.00 g/mol"#?
• What is the binding energy of one mole of 234Th90 if the mass defect is 1.908 g/mol?
• Question #96ccc
• What is the mass percentage composition of potassium in saltpeter, #KNO_3#?
• Elemental chlorine consists mainly of two isotopes: #""^35Cl# of #75%# abundance; and #""^37Cl#... What is the average atomic mass of chlorine?
• Is an #"amu"# related to protonic mass?
• What is the molar mass (gram formula mass) for the compound sodium thiosulfate, #Na_2S_2O_3#?
• Question #6885f
• What is the molar mass of #AuCI_3#?
• Question #0fe2a
• What is the mass in grams of 0.750 moles of #C_3H_8#?
• Question #c71f2
• What is the molar mass of phosphorus?
• How do you calculate the relative formula mass of copper oxide using the periodic table?
• How would you differentiate between relative atomic mass and relative molar mass?
• What is the atomic mass of Helium?
• How is the atomic mass of an element calculated?
• How would I determine how many grams of antimony would form from the reaction of carbon with #"3.6 g"# of antimony(III) oxide?
• What is the mass of #"sodium bicarbonate"#, #NaHCO_3#, in #"amu"#?
• Question #1fb6a
• How do you calculate formula mass?
• Question #0417a
• Lewis has a copper pipe with a length of 150 cm and a mass of 800 grams. He cuts a piece of the copper pipe with a length of 90 cm. How do you work out the mass of this piece of copper pipe?
• Question #e9b89
• The formula for aluminum sulfate is #Al_2(SO_4)_3#. What is the molar mass of aluminum sulfate to the nearest gram?
• Question #e621d
• Question #5d281
• Question #2694b
• Why did early scientists use atomic mass and not atomic number?
• Question #24531
• What is vapour density?
• Question #09add
• Question #41494
• Question #e9503
• How do I get the molar mass of urea?
• Find the formula weight of #"Ca"("C"_6"H"_12"NO"_3"S")_2#?
• Question #7e98d
• What mass of a metal #"M"# displaces 0.7 L of hydrogen at STP if the equivalent mass of the metal is 28 g?
• What is the formula mass of sulfuric acid?
• What is the mass of a mole of water?
• Question #67a20
• Question #62d7e
• Question #421ba
• Oxygen molecule is ______ times heavier than Helium molecule? (A) 2 (B) 4 (C) 8 (D) 16
• Is the molecular mass of nitrogen gas #28*"amu"#?
• Question #c32eb
• What is meant by the term #"equivalent mass"#?
• What is the difference between molar mass and atomic mass?
• Question #ac389
• What is the atomic number of neon?
• If the weight of metal chloride is #x# grams containing #y# grams of metal, then what is the equivalent weight of the metal in terms of #x#, #y#, and #35.5#?
• Question #24a9d
• Why does the atomic mass of an atom equal the weight of 1 mol of that atom in grams?
• A fictitious element that has two isotopes has an average atomic mass of 117.3. If 65.43% of the atoms of the element have an atomic mass of 119.8, what is the atomic mass of the other isotope?
• Question #1df25
• The isotope 121sb makes up 57.21% of naturally occurring antimony. The only other naturally occurring isotope is 123sb. Deduce the relative atomic mass of antimony according to this data. How do I do that?
• Question #6dadc
• Question #96585
• Question #0137a
• Question #32c89
• Why is the atomic mass unit (amu), rather than the gram, used to express atomic mass?
• Question #ff210
• Question #a8d4f
• Question #c6ffd
• Question #560fe
• Hello there, I need to compare two atomic masses of elements together. Can I get some help please? Thanks!
• Why is the atomic mass of the sodium atom #"23 amu"#?
• What is the average atomic mass of an element composed of a series of isotopes, #X, Y, Z# with respective masses, #18.473*"amu", 19.962*"amu", 21.469*"amu"#, and respective abundances, #X=28.812%#, #Y=28.757%#...?
• How does abundance contribute to the average atomic mass of an element?
• Given that, Magnesium's one atom's mass is 4.03463*10^-23 g. What is the relative atomic mass of magnesium?