Ap Chemistry Review Sheet - Winston Churchill High School, 2016-2017 Page 13
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15AP Chemistry
Summer Review
Winston Churchill High School
2016-2017
6. NH
+
4
7. CO
2
8. CH
NH
3
2
9. HCOOH
10. HCN
VI.Stoichiometry
*Please do all questions on a separate piece of paper.
*You will need to be able to write molecular chemical reactions and do mole conversions to
do these questions.
1. 30.5 g of sodium metal reacts with a solution of excess lithium bromide. How many
grams of lithium metal are produced?
2. How many molecules are in 100. L of potassium hydroxide solution at STP?
3. Propane, C
H
, undergoes combustion. How many grams of propane are needed to
3
8
produce 45.9 g of water?
4. How many moles are in 3.02 x 10
molecules of water?
26
5. Find the empirical and molecular formulas for a compound containing 11.66 g iron
and 5.01 g oxygen if the molar mass of the compound is 320 g/mol.
6. A solution of 3.50 g of sodium phosphate is mixed with a solution containing 6.40 g
of barium nitrate. How many grams of barium phosphate can be formed?
7. Find the empirical and molecular formulas for a compound containing 5.28 g of tin
and 3.37 g of fluorine if the molar mass of the compound is 584.1 g/mol.
8. Octane, C
H
, undergoes combustion. How many grams of oxygen are needed to
8
18
burn 10.0 g of octane?
9. Sodium azide, NaN
, decomposes into its elements. How many grams of sodium
3
azide are required to form 34.8 g of nitrogen gas?
10. Ammonia reacts with oxygen gas to form nitrogen monoxide and water. How many
grams of nitrogen monoxide are formed when 1.50 g of ammonia react with 2.75 g of
oxygen gas?
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