Percent Composition

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Questions

• What is mole percent?
• Question #e2e8b
• Question #bc737
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• Question #fee41
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• Why is percent composition important in chemistry?
• How can I find the percent compositions of Al2(SO4)3?
• How can I find the percent compositions of Mg(NO3)2?
• What is percent composition by mass?
• What does percent composition tell you about a molecule?
• How can I find the percent compositions of N2S2?
• How can I find the percent composition of (NH4)2S?
• How can I calculate the mass percent of carbon, nitrogen and oxygen in acetamide, #C_2H_5NO#?
• How can I find the percent compositions of CuBr2?
• How can I calculate the percent composition of C2H8N?
• How can I calculate the percent composition of C4H4O?
• How can I calculate the percent composition of CFBrO?
• How can I calculate the percent composition of water in a hydrate?
• How can I calculate the percent composition of magnesium oxide?
• How can I calculate the percent composition of C2OH4?
• What’s the empirical formula of a molecule containing 18.7% lithium, 16.3% carbon, and 65.0% oxygen?
• What’s the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen?
• How can I calculate the percent composition of an element?
• How do you calculate percent composition of a compound?
• How can I calculate the percentage by mass of sodium in sodium azide, NaN3(s); used in automobile air bags?
• How can percent composition be calculated?
• What is an example of a percent composition practice problem?
• What is percent composition in chemistry?
• Question #5e9c7
• A sample of aluminum oxide has a mass of #"6.67 g"#. It was found to contain #"4.78 g Al"#. What is the percent composition of aluminum in the sample?
• Question #90e5d
• Question #85471
• How do you work out the percentage of each element in sodium hydrogen sulfate ?
• For % Composition, when to use mass method and when to use formula method Any hint or trick?
• Calculate the % composition (by mass) of Mg in Mg3(AsO4)2?
• Question #6b970
• Question #d34c1
• Question #711d1
• Question #e5db6
• What is the percentage of ammonium ions in ammonium dichromate?
• Question #f4c23
• Question #67109
• What is the percent composition of nitrogen, #N#, in ammonium sulfide, #(NH_4)_2S#?
• Question #89ca6
• Question #d2834
• Question #edc96
• Question #e25c7
• How many grams of #CO_2# are produced by the combustion of 484g of a mixture that is 35.1% #CH_4# and 64.9% #C_3H_8# by mass?
• Question #eda5e
• 2.76 #g# of #K_2CO_3# was treated by a series of reagents so as to convert all of its carbon to #K_2Zn_3[Fe(CN)_6]_2#. Calculate the weight of the product?
• What is the percent by mass of nitrogen atom in ammonium sulfate, #("NH"_4)_2"SO"_4#?
• Question #3c82d
• Question #fbe82
• What is the difference between mass composition and percent composition?
• Question #9be80
• Question #3d4c9
• Question #01cd8
• Question #fb39d
• Question #c05d2
• There are two compounds of titanium and chlorine. One compound contains 31.04% titanium by mass, and the other contains 74.76% chlorine by mass. What are the ratios of titanium and chlorine atoms in the two compounds?
• Question #9d98c
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• Question #e8b20
• Question #7fb69
• Question #e3e98
• Question #c894f
• Question #2040e
• Question #07c92
• Chlorous acid, #HClO_2#, contains what percent hydrogen by mass?
• What is the empirical formula of a compound which has a percent composition of 40.04% S and 59.96% O?
• How many grams of H are there in 23.5 g of #H_2O#?
• What is the mass percent of #"Cl"# in #"CCl"_4#?
• What is the mass of Cl in 21 g of NaCl?
• The mass ratio of sodium to fluorine in sodium fluoride is 1.21:1. A sample of sodium fluoride produces 34.5 g of sodium upon decomposition. How much fluorine (in grams) forms?
• A 4.78-g sample of aluminum completely reacts with oxygen to form 6.67 g of aluminum oxide. What is the mass percent composition of aluminum in aluminum oxide?
• What is the percentage composition of #CF_4#?
• How many grams of gold should a coin of 35% gold be if when combined with a 3 grams pure gold necklace, it forms a metal that is 69 % gold?
• Question #36c25
• 385mg of iron reacts with excess bromine, producing 1921mg of a mixture of FeBr2 and FeBr3. How would you calculate the masses of FeBr2 and FeBr3 in the product mixture?
• Question #c0e53
• Question #f3642
• Question #05c43
• 75g of potassium nitrate are dissolved in 150g of water. What is the percent by mass of potassium nitrate?
• What is the percentage composition of #PbCl_2#?
• What is the percentage composition of #Ba(NO_3)_2#?
• What is the percentage composition of #(NH_4)_2CO_3#?
• Question #73616
• Question #4d8ee
• What is the percent by mass of the magnesium hydroxide?
• A sample of an unknown metal chlorate, weighing 5.837 g, is heated until all of the oxygen is driven off. The residue remaining in the container weighs 1.459 g. What is the percentage of oxygen in this metal chlorate?
• Question #ffeee
• A chemist decomposes 100.1 grams of a substance into 12.1 grams of carbon and 40.0 g of magnesium. The only other product of the decomposition as oxygen, but the gas escaped from the setup. What was the mass of oxygen gas that escaped?
• Question #afaf3
• What is the percentage composition of a soap #(C_17H_35COONa)#?
• What is the mass percents for the elements present in #H_2SO_4#?
• Question #3084b
• An unknown compound was found to have a percent composition as follows 47.0% potassium, 14.5% carbon, and 38.5% oxygen. What is its empirical formula?
• Question #cf1f9
• What is the percentage composition of #CuCl_2#?
• A 5.25 gram sample of a cobalt chloride hydrate is heated until dried. The anhydrous sample has a mass of 3.00 gram. What is the percent water by mass of the original hydrate?
• A sample of an iron oxide weighing 0.982g is found to contain 0.763 g of iron. The rest of the mass is oxygen. What is the % composition of each element?
• How can you represent the composition of an ionic compound?
• \What is the percent by mass of hydrogen in aspirin, #C_9H_8O_4#?
• A 5.0 g sample of a pure compound containing H, C, and N contains .19 g of H and 2.22 g of C. Another smaller sample of this pure compound is analyzed. How many grams of N should be found in the new 2.0 g pure sample?
• What is the percentage composition of ammonium nitrate, #NH_4NO_3#?
• Question #6cd32
• Do all pure samples of a given compound have the same percent composition?
• Question #56d2c
• Question #97fef
• What is the percentage composition of a compound containing 32.0 g of bromine and 4.9 g of magnesium?
• What is the percent by mass of nitrogen in #NH_4NO_3#?
• When a 14.2-g sample of mercury (II) oxide is decomposed into its elements by heating, 13.2 g Hg is obtained. What is the percent composition of the compound?
• A compound is formed when 9.03 g Mg combines completely with 3.48 g N. What is the percent composition of this compound?
• Question #91e81
• In lab you combine 2.5 g of magnesium, #Mg#, with 1.1 g of oxygen, #O#. What is the percent composition by mass of each element in the compound you produced?
• What is the percent composition by mass of aspartame #C_14H_18N_2O_5#?
• What is the percent composition of #H_2S#?
• What is the percent composition of #Na_3PO_4#?
• What is the percent by mass of oxygen in #H_2SO_4#?
• What is percentage composition?
• How do I find the percentage composition of Nitrogen in N_2O5?
• What is the percentage composition of a compound containing 32.0 g of bromine and 4.9 g of magnesium?
• What is the percent composition of CO2?
• How do you calculate the percent composition of water?
• How do I find the percentage composition of Oxygen in #N_2O_5#?
• How do you calculate the percentage composition of Oxygen in #N_2O_5#?
• How do you get the Molecular Formula from Percent Composition?
• How do you calculate the percent composition by mass of each element in #Al(OH)_3#?
• What is percent composition of ethanol ( #C_2H_5OH# )?
• How do you calculate the percentage composition of Carbon in #C_2H_6#?
• What is the percent composition of #H_2S#?
• How do you calculate the percent composition of lactose, #C_12H_22O_11#?
• What is the percent composition of Ammonia, #NH_3#?
• If there are 100g of #NaClO_2# how would you calculate the percent composition by mass of each element in #NaClO_2#?
• How do you calculate the percentage composition of #(NH_4)_2CO_3#?
• If a sample of iron oxide has a mass of 1.596g and was found to contain 1.116g of iron and .48g or oxyygen, how would you find the percentage composition of this compound?
• What is the percent composition of a carbon, in heptane, #C_7H_16#?
• What is the percent composition of a carbon, in heptane, #C_7H_16#?
• What is the percent composition of a compound with the empirical formula #MgCl_2#?
• How do I find the percentage composition of Chlorine in #CoCl_2#?
• How do you calculate the percentage composition of Iodine in #NI_3#?
• How do you calculate the percentage composition of Iodine in #NI_3#?
• What is the percent composition of Carbon in aspartame #C_14H_18N_2O_5#, an artificial sweetener?
• How do you calculate the percentage composition of Oxygen in #Zn(NO_3)_2#?
• If a .500g sample of citric acid containing only carbon, hydrogen, and oxygen is burned to produce .687g #CO_2# and .187g #H_2O# what is the percent composition and how do you calculate it?
• What is the percent composition of #(NH_4)_2S#?
• How do you calculate the percentage composition of Copper in #CuSO_4#?
• How do you calculate the percent composition of chromium in #BaCrO_4#?
• Question #e0e87
• Question #a40d7
• What is the percent composition of each element in vitamin E, #C_29H_50O_2#?
• What is the percent composition o #Ba_3(PO_4)_2#?
• What is the % of #C# in #C_6H_12O_6#?
• A compound, #XF_5#, is 42.81% fluorine by mass. What is the element #X#? What is the molecular structure of #XF_5#?
• What is the mass percent of each element in sulfuric acid, #H_2SO_4#?
• Sylvanite is a mineral that contains 28.0% gold by mass. How much sylvanite would you need to dig up to obtain 66.0 g of gold?
• What is the percent water in the compound barium chloride dihydrate?
• The chemical formula of ilmenite is #FeTiO_3#. What mass of titanium can be obtained from 500.0 g of ilmenite?
• What is the percentage composition of #NH_4I#?
• How many grams of #Br# are in 195 g of #CaBr_2#?
• What is the percent composition by weight of #Al# in #Al_2(SO_4)3#?
• The mixture of Na2CO3 and NaHCO3 weighs 220g. Heated precipitate weighs 182g. What is the percent composition?
• Question #dc235
• Question #59c70
• Question #44937
• Question #c06a7
• What the mass percent of aluminum in #Al(OH)_3#?
• What is the mass percent of carbon in propanoic acid #(C_2H_5COOH)#?
• Hydrogen reacts with .771 g of carbon to form .90 g of a compound. What is the mass percent of hydrogen in the compound?
• What is the mass percent of nitrogen in the dyeing agent, picric acid (#C_6H_3N_3O_7#)?
• What is the percent composition of a carbon-oxygen compound, given that a 95.2 g sample of the compound contains 40.8 g of carbon and 54.4 g of oxygen?
• Question #c2038
• How many grams of #"Pt"# are present in 25.0 g of Cisplatin, an anti-tumor agent?
• What is the mass percent of hydrogen in ammonium phosphate, #(NH_4)_3PO_4#?
• Alicin contains 59.9 of carbon, 21.7 hydrogen, 24.4 g of oxygen, and sulfur. What the mass percent of sulfur in a 162 g sample of the compound?
• 294 g of potassium dichromate contains 52 g of chromium and 39 g of potassium. What is the mass percent of oxygen in the compound?
• What is the percentage of lithium in lithium carbonate #(Li_2CO_3)#?
• A compound weighing 115 g contains 68.3 g of carbon, 13.2 g of hydrogen, 15.9 g of nitrogen, and some amount of oxygen. What is the mass percent of oxygen in the compound?
• A 230 g sample of a compound contains 136.6 g of carbon. 26.4 g of hydrogen, and 31.8 g of nitrogen. The rest is oxygen. What is the mass percent of oxygen in the compound?
• What is the mass percent of chlorine in chloroform #CHCl_3#?
• Question #27fd7
• How many oxygen ATOMS are present in a #75*g# mass of water?
• What is the percentage of lithium in lithium carbonate #Li_2CO_3#?
• What is the mass percent of nitrogen in ammonium carbonate, #(NH_4)_2CO_3#?
• A compound contains 14.5 g of magnesium and 3.5 g of oxygen. What is the mass percent of oxygen in the compound?
• If one molecule of hemoglobin contains 4 iron atoms, and they constitute #0.335%# by mass of hemoglobin, what is the molar mass of hemoglobin?
• What is the mole fraction of #KCl# in a mixture of 0.564g #NaCl#, 1.52g #KCl# and 0.857g #LiCl#?
• If the mole fraction of #NaCl# in an aqueous solution is 0.0927, what is the percent by mass of #NaCl#?
• If the mole fraction of #"NaCl"# in a solution is #0.125#, what is the percent by mass of #"NaCl"#?
• What is the mole fraction of #NaOH# in an aqueous solution that contains 15.0% #NaOH#?
• What is the percent composition of #K_3PO_4#?
• What is the mathematical formula for calculating mass percent composition from a chemical formula?
• The formula for mustard gas used in chemical warfare is #C_4H_8SCl_2#, which is 159.09 g/mol. What is the percentage of hydrogen in the compound?
• The formula for the illegal drug cocaine is #C_17H_21NO_4#, which is 303.39 g/mol. What is the percentage of carbon in the compound?
• The first inert as compound to be synthesized was #XePtF_6#, which is 440.37 g/mol. What is the percentage of platinum in the compound?
• What is the mass of oxygen in 8 moles of carbon dioxide?
• What is the percent by mass of water in barium bromide tetrahydrate #BaBr_2 * 4H_2O#?
• What is the percent by mass of carbon in acetone, #C_3H_6O#?
• Question #586cc
• What is the percent by mass of hydrogen in the compound #C_2H_6#?
• What is the mass of hydrogen in one mole of aluminum hydroxide?
• Question #651d4
• What is the percentage metal content by mass in aluminum sulfate?
• A 143.1 g sample of a compound contains 53.4 g of carbon, 6.9 g of hydrogen, 43 g of nitrogen, and some amount of oxygen. What is the mass percent of oxygen in the compound?
• Question #ac390
• What is the percentage metal content in aluminum sulfate?
• What is the mass of hydrogen in 49.2 g ammonium hydrogen phosphite?
• How do you calculate the percent by weight of each element in #Na_2SO_4#?
• Question #86743
• Question #8fb2b
• An unknown compound has a percent composition of 52.10% potassium, 15.8% carbon, and 32.1% oxygen. The molar mass of the compound is 150.22 g/mol. What is the empirical formula and the molecular formula of this compound?
• What is the percent by weight of sodium in sodium sulfate?
• How can I find the actual percent composition of magnesium oxide?
• Question #05ae8
• How many grams of 20% zinc oxide ointment would contain 10 g of zinc oxide?
• What is the percentage of #Cl# in #Al(ClO_3)_3#?
• How many grams of calcium carbonate, #CaCO_3#, contain 48 grams of oxygen atoms?
• What is the number of grams of xenon in 3.958 g of the compound xenon tetrafluoride?
• Question #5c707
• What is the percent by mass of chlorine in potassium chloride?
• What is the mass percent oxygen in sodium carbonate, #Na_2CO_3#?
• How do you calculate the percent by mass sulfur in sulfuric acid?
• A 4.33 g sample of a laboratory solution contains 1.32 g of acid. What is the concentration of the solution as a mass percentage?
• Question #f137a
• A compound contains only an unknown metal and chlorine. If analysis shows 41.65 grams of the compound contain 14.18 grams of chlorine, what is the % of the metal in the compound?
• What is the percent by mass of each element in a compound?
• What is the percentage by mass of carbon in #CH_3(CH_2)_5COOH#?
• Question #f5f0c
• If 3.907 g carbon combines completely with 0.874 g of hydrogen to form a compound, what is the percent composition of this compound?
• What is the percent composition of a compound containing tin and chlorine if 18.35 g of the compound contains 5.74 g of tin?
• A sample of a compound analyzed in a chemistry laboratory consists of 5.34 g of carbon, 0.42 g of hydrogen, and 47.08 g of chlorine. What is the percent composition of this compound?
• What is the percentage of water in #"MnCO"_3 *8"H"_2"O"#?
• A sample of 22k gold contains the following by mass: 22 grams gold, 1 gram silver, and 1 gram copper. What is the percent of gold?
• What is the percent potassium, chromium, and oxygen in #K_2Cr_2O_7#?
• What is the mass percent of hydrogen for #C_3H_5OH#?
• The solder once used by plumbers to ten copper pipes to together consists of 67% lead and 33% tin. What is the mass of lead in a 250-g block of solder?
• Question #49595
• How many gold atoms in a #"carat"#?
• Question #6fa05
• Question #eaf9b
• Question #d9700
• Question #a24ba
• If you mixed 80 tons of sand, 12 tons of rock, and 4.0 tons of cement to make concrete, what would the percent by weight of sand be?
• What is the percentage by mass of ammonium nitrate?
• What is the percentage by mass of #SO_3#?
• A78.0-g sample of an unknown compound contains 12.4 g of hydrogen. What is the percent by mass of hydrogen in the compound?
• A compound containing only carbon and hydrogen has a carbon-to-hydrogen mass ratio of 11.89. Which carbon-to-hydrogen mass ratio is possible for another compound composed only of carbon and hydrogen?
• Question #f2548
• How do you calculate the percent composition of all the elements in #Ca(NO_3)_2#?
• When 150 #cm^3# of water freezes, 162 #cm^3# of ice is formed. How do you calculate the percentage increase in the volume?
• Question #35687
• Question #7b0d0
• What is the percentage of carbon by mass in citric acid?
• Question #a455e
• Question #b98f4
• A compound is broken down into 34.5 g of element A, 18.2 g of element B, and 2.6 g of element C. What is the percent (by mass) of each element?
• If 1.0 g of hydrogen reacts completely with 19.0 g of fluorine, what is the percent by mass of hydrogen in the compound that is formed?
• Question #3e721
• Hydrogen was passed over heated 2g copper oxide till only copper was left. The mass of copper obtained was was 1.6 grams. What is the percentage of oxygen in copper oxide?
• How do you calculate the mass percent composition of carbon in each carbon-containing compound?
• Question #0ca2b
• Question #f28fb
• What mass in grams of iron(III) oxide contains 71.6 g ofiron? Iron(III) oxide is 69.94% iron by mass.
• How do we find percentage composition of a compound, with respect to an element....?
• What is percentage content of carbon by mass in #Ca(HCO_3)_2#?
• A 25.0 g sample of an aluminum/mercury amalgam used for filling cavities is 7.00% mercury by mass. What is the mass of aluminum in the 25.0 g sample? (Use correct numbers of significant figures)
• What mass of magnesium oxide results from thermal decomposition of #250*g# of magnesium carbonate?
• What is the percent composition by mass of oxygen in magnesium oxide?
• How do you calculate the percentage of calcium in calcium carbonate, #CaCO_3#?
• Question #d1163
• How do you calculate the percentage by mass of carbon in carbon monoxide?
• How would you calculate the percentage by mass of oxygen in a compound?
• How would you determine percent by mass of acetic acid present in a reaction?
• What is the percent composition of nitrogen for #Sr(NO_3)_2#?
• If the quantity of metal in a metallic oxide is 60%, what is its equivalent weight?
• What is the percentage metal by mass in magnesium oxide?
• What is the percentage by mass of iron (Fe) in the mineral hematite (#Fe_2O_3#)?
• What is the approximate percentage of #CO_2# combined with globin?
• Question #eaa82
• The mass of water is 18.00 grams per mole. What is the % of oxygen in water?
• When a 13.60-g sample of a compound containing only magnesium and oxygen is decomposed, 5.40 g of oxygen is obtained. What is the percent composition of this compound?
• How do you calculate the percentage of Cu in #CuSO_4#? What is the atomic weight (mass) of each element?
• How do you calculate the percent composition by mass of #O# in picric acid (#C_6H_3N_3O_7#)?
• What is the percent composition of water in #"Na"_2"SO"_4 * 10"H"_2"O"#?
• Question #7b152
• What is the percent of carbon in 50.0 g of cyclohexane?
• Question #4b784
• What percent of calcium carbonate is oxygen?
• How do we assess the purity of organic compounds?
• How do you calculate the percentage composition by mass of potassium in potassium hydroxide?
• How do you find the percentage composition of a compound that contains 17.6 g of iron and 10.3 g of sulfur? The total mass of the compound is 27.9 g.
• Question #aad5c
• What percentage does oxygen make up in the compound #MgSO_4#?
• What is the percentage #"ammonium"# content in #"ammonium dichromate"#?
• Calculate the mass of oxygen in a molecule of #"CO"_2# by using percentage composition? please help
• What is the percentage composition by mass of the constituent atoms in calcium nitrate?
• A student had a sample of #"BaCl"_2 * 2"H"_2"O"# and an inert material. He heated a sample until the mass did not change...? (Problem below)
• MgO Lab: How would your calculated value for the percent composition of magnesium oxide been affected if all the magnesium in the crucible had not reacted?
• Question #717ba
• Question #2be51
• A 3.060 g sample of a mixture was analyzed for barium ion by adding a small excess of sulfuric acid to an aqueous solution of the sample.The resultant reaction produced a precipitate of barium sulfate, which collected by filtration, washed, dried, weight?
• What is the percent composition of carbon in acetic acid?
• The label on an Ocean Spray Cran-Raspberry drink lists 30 g of sugar in 240 mL of drink. I weighed 240 mL of drink and found its mass to be 251 g. What is the percent composition of sugar in the drink?
• Question #240cc
• Question #e0d9c
• A #2.03*g# mass of calcium salts contains #1.33*g# calcium carbonate. What is the #%# calcium carbonate; and what is the percentage by mass of of calcium in calcium carbonate?
• How many milligrams in a #1.36*g# mass?
• What mass of sulfur is contained in a #250*g# mass of #98%# #"sulfuric acid"#?
• Question #43840
• How do you find the percent composition of oxygen in sodium hydroxide?
• How do you find the percent composition of all elements in sulfur trioxide?
• What mass of metal is present in a #45.8*g# mass of barium sulfate?
• What is the percentage composition of each element in #"Freon"#, #CF_2Cl_2#?
• Question #0dbab
• What is the percentage by mass of carbon in caproic acid?
• Question #373c7
• What is the percent composition by mass of nitrogen in #(NH_4)_2CO_3#?
• How do I verify the percent composition of #"MgSO"_4cdotx"H"_2"O"# in this Epsom Salt package and solve for #x#?
• What is the percent by mass of water in #CuSO_4*5H_2O#?
• Question #6e99b
• A substance contains 35.0 g nitrogen, 5.05 g hydrogen, and 60.0 g of oxygen. How many grams of hydrogen are there in a 142-g sample of this substance?
• Question #a1df0
• How would you determine what compound has the highest percent by mass of hydrogen?
• What is the mass percent of #Fe# in iron(II) ammonium sulfate hexahydrate, #Fe(NH_4)_2(SO_4)_2 * 6H_2O#?
• Coal is not a pure chemical compound, but its elemental composition can be approximated by the formula #C_135H_96NO_9S#. What is the approximate percentage by mass of sulfur in coal?
• Question #c9ede
• Question #6f7b3
• Question #a3c21
• Question #ad9c5
• Question #030a2
• If 1g sample of limestone was dissolved in acid to give 0.38 g of #"CO"_2#. If limestone contains no carbonate other than #"CaCO"_3#, find the percentage of #"CaCO"_3# in the limestone?
• What is the mol fraction of ethanol in a #"4.4 mol/kg"# aqueous solution?
• Question #e864f
• Question #d3f2e
• Question #be1e2
• A #0.49*g# mass of water is LOST from a mass of #3.75*g# #Fe(NO_3)_3*2H_2O# upon prolonged heating. What is the percentage composition of water with respect to the starting salt?
• What is the percentage composition by mass of water in #CaSO_4*2H_2O#?
• In a #5*kg# mass of urea, what is the mass of nitrogen?
• Question #d61b3
• Question #ebf5e
• What is the elemental composition of #H_3PO_4#?
• How do you find the percent composition (by mass) of each element in iron(II) nitrate?
• Question #66054
• If 60.2 grams of Hg combines completely with 24.0 grams of Br to form a compound, what is the percent composition of Hg in the compound?
• A compound of 2.225 g, known to be a carbohydrate, was analyzed and found to contain 0.890 g of carbon, 0.148 g of hydrogen and the rest was oxygen. How do you determine the percentage composition by mass of the compound?
• A mixture of magnesium carbonate and magnesium oxide of mass #12.46*g# underwent fierce heating. After heating, there were #8.43*g# of salt remaining. What were the masses of magnesium carbonate, and magnesium oxide in the original sample?
• Question #11d9c
• Question #a18c9
• A 75.0 g sample of a solution is known to contain 23.8 g of glucose. What is the mass percent of glucose in this solution?
• Calculate the percentages by mass of magnesium, oxygen and hydrogen in magnesium hydroxide, #Mg(OH)_2#. What is the mass of magnesium in #97.4# #g# of #Mg(OH)_2#?
• What is the percent composition of water in #Na_2S • 9H_2O?#
• An oven-cleaning solution is 40.0% (by mass) #NaOH#. If one jar of this product contains 454 g of solution, how much #NaOH# does it contain?
• What is percentage composition of element by mass in the lithium nitride salt, #Li_3N#?
• What is the percent composition of #NiO#, if a sample of #NiO# with a mass of 41.9 g contains 33.1 g #Ni# and s g #O#?
• If #4.57*g# of glucose are dissolved in #25.2*g# of water, what are the mole fractions, #chi_"each component"#?
• Question #df751
• Question #9af40
• Question #9f7ef
• What is the percent composition by mass of nitrogen in #(NH_4)_2CO_3# (gram-formula mass 96.0 g/mo)?
• Question #13edc
• What mass in kg of #"CuFeS"_2"# ore is required to obtain #"325 g"# of pure copper?
• How do you solve this titration calculation?
• Question #745de
• Question #90bc3
• Question #bb490
• A #25*g# mass of a mixture of calcium carbonate and sodium hydroxide is subjected to fierce heat. What are the masses of each salt in the mixture?
• Question #68096
• Question #fc962
• What are the smallest and largest volumes of 0.15 mol/L silver nitrate solution required to react with 0.3 g of a mixture of potassium chloride and barium chloride dihydrate?
• Question #15857
• What are the mole fractions of #"water, ethanol, acetic acid,"# in a #25%:25%:50%# mixture by mass?
• the enol content of which is greater i)1,3,5 trihydroxy benzene ii)1,2,4 trihydroxy benzene. also explain why?
• Question #22a3c
• If we require #445*g# of copper metal, what mass of #CuFeS_2# ore do we need?
• What is (i) #%O# in #"aluminum sulfate"# by mass? And (ii) given a #1.00*g# mass of this salt, how many formula units does this mass represent?
• What is the percent by mass of a solution that contains 45.0 g #"KNO"_3# in 295 mL water?
• Question #2fed5
• Question #0d581
• How do you find the elemental composition of carbon, hydrogen, and oxygen, of acetic acid?
• Question #9cc47
• Question #e18cb
• How do you calculate the percent composition by mass of each element in #Al(OH_)3#?
• Question #61ae6
• What mass of oxygen is found in #"1.36 g"# of #"MgO"#?
• Question #12c2c
• What are #"molality"#, and #"molarity"# of....?
• Question #a3d1b
• Question #1f52d
• Question #dbbe6
• A #3.41*g# mass of gold is alloyed with a #2.43*g# mass of silver. What is the purity of the gold in terms of #"karats"#?
• Question #99452
• How many moles of iron oxide are present in a mass of #16*kg#?
• #"50 g"# of #"ZnS"# are strongly heated in air to effect partial oxidation and the resultant mass weighed #"44 g"#. What is the ratio of #"ZnO"# to #"ZnS"# in the resulting mixture?
• Calculate the mass of the chalk that contains impurities?
• What is the percentage composition by mass of nitrogen in calcium nitrate?
• Question #133bf
• Question #1cf45
• A #2.19*g# mass of potassium nitrate is dissolved in a #75*g# mass of water. What is it percentage concentration?
• Question #b124d
• What is the percentage of oxygen in sulfuric acid?
• Question #f9291
• Question #f6775
• What is the percentage composition by mass of nitrogen in ammonia?
• Question #351ba
• Question #3336d
• Question #a6f2d
• What mass of calcium phosphate will I need to contain the same number of ions as 14.2 g of sodium phosphate?
• A #"0.4596 g"# sample of a pure soluble chloride compound is dissolved in water, and all of the chloride ion is precipitated as #"AgCl"# by the addition of an excess of silver nitrate. The mass of the resulting #"AgCl"# is found to be #"0.6326 g"#...?
• Question #c09f6
• What is the percentage by mass of phosphorus in a washing powder, in which a 0.085 g precipitate of magnesium pyrophosphate forms from a 2 g sample of powder? (Gravimetric analysis).
• A 67.2 g sample of a gold and palladium alloy contains #2.49 times 10^23# atoms. What is the composition (by mass) of the alloy?
• How do we assess salt content of a solution?
• A hydrate containing aluminium sulphate has the formula #"Al"_2 ("SO"_4)_3 * x"H"_2 "O"# and it contains 11.11% of aluminium by mass. Calculate the value of #x# in the hydrate formula. ?
• What is the mass % of H in C9H10N2?
• What is the percentage composition of chlorine by mass in calcium chloride?
• Question #bd620
• What mass of #"ferric oxide"# would result from oxidation of a #58.7*g# iron metal. What mass of dioxygen is required?
• A sample of indium chloride, #"InCl"_3#, is known to be contaminated with sodium chloride, NaCl. The contaminated sample is then treated with excess #"AgNO"_3#(aq). What is the percentage by mass of #"InCl"_3# in the sample?
• How to find Percent Composition of Magnesium Oxide with Masses of Magnesium and Oxygen? After that how do I find percent error/
• Question #532b9
• Question #cd3fd
• Question #d7115
• What is the percent by mass of hydrogen in aspirin, #C_9H_8O_4#?
• Question #1d3d1
• A container was found in the home of the victim that contained 103 g of ethylene glycol in 340 g of liquid. What was the percentage of ethylene glycol?
• 1 tonne of CuSO4 contains how many kg of copper? (Mr; Cu=63.5, S=32, O=16)
• Question #74a4c
• One of the chlorophylls, chlorophyll a, has four nitrogen atoms in a molecule, and the mass fraction of nitrogen is 6.27%. What is the relative molar mass of chlorophyll a?
• A sample of a mineral contains #26.83%# #"KCl"# and #34.27%# #"MgCl"_2#. Find the percentage of chlorine in this sample?