Chapter 10 Review
Name ________________________________
Chapter 10 Quiz Format: 35 points, 10 multiple choice (1 pt each) and 5 open ended
Open Ended:
1 mole conversion – see review #2
1 percent composition – see review #3, 4, and 5
1 percent mass water in hydrate – see review #9
1 hydrate formula – see review #10 and 11
1 empirical/molecular problem – see review #6, 7, and 8
1. Calculate the molar masses of the following compounds:
a. Copper (I) oxide
b. Potassium permanganate
2. How many moles are in each of the following (single conversions):
a. 10 g of NaCl
b. 4.39 x 105 atoms of potassium
c. 56.3 L of oxygen gas at STP
d. 789 g of silver nitrate
3. What is the percent composition of H2Se?
4. What is the percent composition of acetic acid?
5. What is the percent composition of barium fluoride?
6. Determine the empirical formula and name for a compound where the sample contains 8.29 % Al, 32.7
% Cl. and 59.0 % O.
Chapter 10 Review
Name ________________________________
7. Determine the molecular formula for a compound that has a molar mass of 78 g/mol and is 92.3 % C
and 7.70 % H.
8. Determine the molecular formula for a compound that has a molar mass of 695 g/mol is 26.7 % P, 12.1
% N, and 61.2 % Cl.
9. Detemine the percent by mass water in the following hydrates:
a. Sodium fluoride nonahydrate
b. Ca3(PO4)2  3H2O
10. What is the formula for a hydrate of strontium oxalate: mass of hydrate is 100.00 grams, the mass of the
anhydrate is 90.70 g?
11. When 8.00 g of Pb(CH3COO)2 hydrate are heated to allow the water to evaporate, the remaining
anhydrate has a mass of 6.86g. Determine the chemical formula and name of the hydrate.
12. What is the density of fluorine gas at STP?
13. What is the density of nitrogen gas at STP?
14. What is the molar mass of a gas that has a density of 1.00 g/L at STP?
15. What is the molar mass of a gas that has a density of 3.57 g/L at STP?