Answers created by Owen Bell
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Why is this statement false: "If 10 grams of propane burn, you need 50 grams of oxygen."?

Question #f2baa

Question #d24f9

The IE of H is 1.31 MJ/mole. If all three electrons in Li were in the 1st shell at a distance equal to that of H, which of the following values would be the better estimate of the first ionization energy of Lithium: 3.6 MJ/mole or 0.6 MJ/mole? Why?

Question #82e8d

If someone says you're wont to buy flowers, what does he or she mean?

Where are atoms that tend to gain electrons located in the periodic table of the elements?

What is an isothermal process with an example?

Question #a8780

Is NF3 an acid or a base?

What conditions are present to determine whether a reaction will be sn1 or sn2?

How many pi bonds are in #SO_2#?

What English helping verb is always used to translate the pluperfect tense?

What is the mass percent of carbon in propanoic acid #(C_2H_5COOH)#?

According to the VSEPR theory, a molecule with the molecular formula of #A_2# has what shape?

Question #73f32

Why is Hess' law useful to calculate enthalpies?

What is the balanced net ionic equation for #H_3PO_4(aq) + Ca(OH)_2(aq) > Ca_3(PO_4)_2(aq) + H_2O(l)#?

Question #578d1

Question #45625

Question #9b9c9

What is the molecular formula of a compound with a mass of 180 grams and an empirical formula of #CH_2O#?

What is the formula for sodium nitride?

In the formula #H_2O_2 > H_2O + O_2#, how many grams of #O_2# are produced from the decomposition of 68 g of #H_2O_2#?

How would you know if an element is an isotope?

What is the molar mass of #K#?

What is the most common isotope of chlorine?

How do you find the slope and intercept of #y=2/3x+4#?

What is the electron configuration for a chloride ion?

Question #ea867

If the diameter of a circle is 20cm, what is the area?

What are the intermolecular forces of CHF3, OF2, HF, and CF4?

A compound contains 40% calcium, 12% carbon, and 48% oxygen by mass. What is the empirical formula of this compound?

What is the difference between standard enthalpy of combustion and standard enthalpy of formation?

How are alkyl groups electron donating?

How many individual atoms make up one unit of aluminum chloride, #AlCl_3#?

You need to construct a regular polygon. When you draw two sides, the interior angle created between them is 120°. What will be the sum, in degrees, of the measures of the interior angles of this polygon when it is completed?

What is the distance between # (–2, 1, 3) # and #(8, 6, 0)
#?

What is the molecular weight of the acetic acid #(CH_3CO_2H)#, rounded to the nearest integer?

Is electric charge a physical property of matter?

Is there a way to "disable" graphs from autoupdating when writing an answer?

Samantha ran 5 miles in 42 minutes. Meghan ran 8 miles in 68 minutes. Who has a faster speed in minutes per mile?

What is the volume of #H_2# generated by reacting 4.33g of #Zn# with excess #H_2SO_4# at 38°C and 760 torr?

An ideal gas has a volume of 2.28 L at 279 K and 1.07 atm. What is the pressure when the volume is 1.03 L and the temperature is 307 K?

How do you solve for y in #9y=1.5x#?

How do valence electrons relate to the periodic table?

What element has an electron notation #(Kr)5s^(2)4d^(10)5p^2#?

Do any of the following compounds exhibit london dispersion forces: CO, NH3, CO2, CH4, and H2?

Question #76404

How do ionization energy and electron affinity determine whether atoms of elements will combine to form ionic compounds?

Gallium has two naturally occurring isotopes. The mass of gallium69 is 68.9256 amu and it is 60.108% abundant. The mass of gallium71 is 70.9247 amu and it is 39.892% abundant. What is the atomic mass of gallium?

What is the distance between #(8, 2) # and # (4, 5)
#?

Mr. Jacobs is 4 times as old as his son. Five years ago, he was was 9 times as old as his son. What is Mr. Jacob's age?

What allows gravity to pull in on things without using energy?

Does hydrogen bonding have a directional character?

Jennifer works in a music store and earns 8.2% commission on each sale. If Jennifer sells a tuba and earns $125.25, what is the price of the tuba?

How would you explain the difference between van der Waals interactions and hydrophobic interactions?

How does temperature affect the dissociation constant?

What does resonance mean in chemistry?

What is the conductivity of salts?

What is the difference between a chemical symbol and a chemical formula?

Which of the following is Lewis base: AlCl3, CO, CO2, or BF3?

Lead (II) nitrate reacts with potassium iodide to form lead (II) iodide and potassium nitrate. How do you write the balanced equation for this?

Can I make a hexagon with 3 right angles?

What happens to atoms during chemical reactions?

The halflife of the decay of radioactive cesium(134) has been reported to be 2.062 years. What fraction of the original radioactivity will remain after 67 months?

Question #d6b39

Why is the kelvin scale used for gas laws?

Why are neutrons heavier than protons?

How do you write "calcium + nitrogen > calcium nitride"?

What is the variance of the following numbers?:
63, 54, 62, 59, 52,

What is a quadrilateral that is not a parallelogram and not a trapezoid?

Are there atoms that can form covalent and ionic bonds?

A 306090 triangle has a hypotenuse of length 9.8. What is the length of the longer of the two legs?

What is the formula of potassium phosphate in grams/mole?

Question #11baf

In the compound #PCl_3#, how many total valence electrons are present?

What is the dissolution reaction for #KNO_3#. How many moles of ions are formed from it?

How many atoms are in 2.0 mol of Cu?

What causes London dispersion forces?