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VOCABULARY
MOLAR MASS
MOLE CONVERSIONS
PERCENT COMPOSITION
EMPIRICAL/MOLECULAR FORMULA
100
A special term used to count tiny particles such as atoms, molecules, and ions
What is mole (mol)
100
Calculate the molar mass of sulfur trioxide
What is 80.06g
100
How many grams of potassium chlorate are in 3.35 moles of potassium chlorate?
What is 411g
100
What is the percent composition of each element in the water molecule?
What is 11% H and 88.8% O
100
Aspirin is 60.0% C, 4.5% H, and 35.5% O. Calculate its empirical formula.
What is C(9)H(8)O(4)
200
There are a specific number of particles in one mole of a substance (give the number and name of number)
What is 6.022x10^23 and Avogadro's Number
200
Calculate the molar mass of potassium chlorate
What is 122.55g
200
How many grams are in 12.8 moles of oxygen?
What is 410g
200
What is the percent composition by mass in C(5)H(10)O(2)
What is 11.76%-C, 0.99%-H, 15.61%-O
200
The insecticide lindane contains 24.78% C, 2.08% H, 73.14% Cl. If its molar mass is about 291 g/mol, what is the molecular formula?
What is C(6)H(6)Cl(6)
300
gives the lowest whole number ratio of the atoms of an element within a molecular compound
What is empirical formula
300
calculate the molar mass of calcium phosphate
What is 310.18g
300
How many molecules are in 1.74 moles of methane (CH4)
What is 1.05x10^24 molecules
300
What is the percent composition of calcium phosphate
What is Ca-38.76%, P-19.97%, O-41.27%
300
The percent of composition of caffeine is 49.5% C, 5.20% H, 16.4% O, and 28.9% N. What is the molecular formula of caffeine if it's molar mass is 194.1 g/mole.
What is C(8)H(10)O(2)N(4)
400
gives the actual number of atoms of each element within a molecular compound
What is molecular formula
400
calculate the molar mass of sulfuric acid
What is 98.08g
400
You need 250g of table sugar, or sucrose, C(12)H(22)O(11) to bake a cake. How many sucrose molecules will be in the cake?
What is 4.4x10^23 molecules
400
Ammonium dichromate
What is Cr-41.26%, N-11.11%, O-44.43%, H-3.20%
400
What is the molecular formula of triazaborane with a composition of B 40.31%, H 7.51%, and N 52.18% and molar mass of about 80g/mol?
What is B(3)H(6)N(3)
500
two things you need to know to calculate the molecular formula
What is molar mass of the molecular formula and the empirical formula
500
Calculate the molar mass of ammonium monohydrogen phosphate
What is 132.08
500
An extra strength aspirin tablet contains 5.0x10^22 atoms of aspirin (C9H8O4) What is the mass of aspirin in one tablet?
What is 15g
500
What is the percent of water in MgSO(4).7H(2)O
What is 51.17%
500
Dimethylhydrazine, the fuel used in the Apollo lunar descent module, has a molar mass of 60.10 g/mol. It is made up of carbon, hydrogen, and nitrogen atoms. The combustion of 2.859 grams of the fuel in excess of oxygen yields 4.190 grams of carbon dioxide and 3.428 grams of water. What are the empirical and molecular formulas for dimethylhydrazine?
What is CH(4)N e.f. and C(2)H(8)N(2) m.f.