Name:__________________________________ Date:__________________ Class period:_____
U5 Stoichiometry with Mass WKSHT
Classwork!
Directions: For each of the following, use dimensional analysis to solve the problem. Record
your answer to the correct number of significant figures and include the appropriate units.
1. What mass of potassium would react with excess chlorine to produce 156 g of potassium
chloride?
2 K
+
1 Cl2

2 KCl
2. How many grams of zinc will be formed if 32.0 g of copper reacts with zinc nitrate?
Copper(I)nitrate is the other product.
2 Cu
+
1 Zn(NO3)2

1 Zn
+
2 Cu(NO3)
3. Aluminum reacts with 42 g of iron(II) sulfate. How many grams of iron are formed?
Aluminum sulfate is the other product?
____ Al
+
____ Fe(SO4)

____ Fe
+ ____ Al2(SO4)3
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4. How many grams of silver oxide are needed to react with 7.9 g of hydrochloric acid to
produce silver chloride and water?
____ Ag2O
+
____ HCl

____ AgCl
+
____ H2O
5. Calcium chlorate decomposes into calcium chloride and oxygen.
a) Write the word equation and balanced formula equation for this reaction.
b) If 250 g of calcium chlorate decomposes what mass of oxygen would be produced?
6. Chromium reacts with sulfur to produce chromium (III) sulfide.
a) Write the word equation and balanced formula equation for this reaction.
b) What mass of chromium (III) sulfide is produced from the reaction of 13.2 g of sulfur
with excess chromium?
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