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1. If 3.0 liters of oxygen gas react with excess carbon monoxide at STP, how many liters of carbon dioxide can be produced under the same conditions?
2 CO (g) + O2 (g) ____ 2 CO2 (g)
a) 1. L
b) 3.0 L
c) 4.5 L
d) 6.0 L
2. Under certain conditions argon (Ar) gas diffuses at a rate of 3.2 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 4.5 centimeters per second. What is the approximate molar mass of the unknown gas?
a) 10 g/mol
b) 20 g/mol
c) 28 g/mol
d) 56 g/mol
3. Which of the following gases effuses the fastest at a given temperature?
a) Ne
b) CH4
c) Ar
d) H2
4. What is the volume of 3.5 moles of oxygen gas (O2) at standard temperature and pressure (STP)?
a) 6.4 L
b) 22.4 L
c) 32.0 L
d) 78.4 L
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