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Section 4: Gas Stoichiometry


1.	Calculate the number of moles of gas contained in a 16.0-L vessel at 373 K with a pressure of 2.50 atm. Need a Hint?
		A)	2.8 x 10^-3 mol
		B)	1.31 x 10^-1 mol
		C)	0.766 mol
		D)	1.31 mol


2.	Determine the Celsius temperature of 1.50 moles of ammonia contained in a 10.0-L vessel under a pressure of 2.0 atm. Need a Hint?
		A)	-111°C
		B)	162°C
		C)	-50°C
		D)	0.0°C


3.	A gaseous compound is 30.6% nitrogen and 69.4% oxygen by mass. A 5.25-g sample of the gas occupies a volume of 1.00 L and exerts a pressure of 1.26 atm at –4.0°C. What is the molecular formula for the gas? Need a Hint?
		A)	NO
		B)	NO₂
		C)	N₃O₆
		D)	N₂O₄


4.	A 10.0-L vessel contains gas A at a pressure of 300.0 torr. A 3.00-L vessel contains gas B at a pressure of 400.0 torr. Gas A is forced into the second vessel. Calculate the resulting pressure in torr. Assume the temperature remains constant. Need a Hint?
		A)	1000 torr
		B)	1400 torr
		C)	1800 torr
		D)	2000 torr