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Gas Stoichiometry & Applications of the Ideal Gas Equation

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 

Given the reaction:                 2 PbO  -->  2 Pb  +  O2
What is the total volume of O2, measured at STP, produced when 1.00 mole of PbO decomposes?
a.
5.60 L
b.
11.2 L
c.
22.4 L
d.
44.8 L
 

 2. 

A sample of an unknown gas at STP has a density of 0.630 grams per liter.  What is the molar mass of this gas?
a.
2.81 g/mole
c.
22.4 g/mole
b.
14.1 g/mole
d.
63.0 g/mole
 

 3. 

Given the balanced equation:  C3H8  +  5 O2  -->  3 CO2  +  4 H2O
What is the total number of liters of CO2 produced when 20.0 liters of O2 are completely consumed?
a.
12.0 L
b.
22.4 L
c.
3.00 L
d.
5.00 L
 

 4. 

Given the balanced equation:  Ca  +  2 H2O  -->  Ca(OH)2  +  H2
When 80.2 grams of Ca react completely with the water, what is the total volume, at STP, of H2 produced?
a.
1.00 L
b.
2.00 L
c.
22.4 L
d.
44.8 L
 



 
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