Gas Stoichiometry: Automobile Airbags 6. Calculate the volume occupied by 25.2 g
ID: 541576 • Letter: G
Question
Gas Stoichiometry: Automobile Airbags 6. Calculate the volume occupied by 25.2 g of CO2 at 0.84 atm and 25°C (R-0.08206 L atm/K mol). 7. A sample of nitrogen gas is confined to a 14.0 L container at 375 torr and 37.0°C. How 760 many moles of nitrogen are in the container (R-0.08206 L. atm/K mol, 1 atm torr)? Gases are sold in large cylinders for laboratory use. What pressure, in atmospheres, will be exerted by 2,500 g of oxygen gas (O2) when stored at 22C in a 40.0 L cylinder (R 0.08206 L·atm/K·mol)? 8. A flask with a volume of 3.16 L contains 9.33 grams of an unknown gas at 32.0°C and 1.00 atm. What is the molar mass of the gas (R = 0.08206 L·atm/K·mol)? 9.Explanation / Answer
6)
Molar mass of CO2,
MM = 1*MM(C) + 2*MM(O)
= 1*12.01 + 2*16.0
= 44.01 g/mol
mass(CO2)= 25.2 g
number of mol of CO2,
n = mass of CO2/molar mass of CO2
=(25.2 g)/(44.01 g/mol)
= 0.5726 mol
Given:
P = 0.84 atm
n = 0.5726 mol
T = 25.0 oC
= (25.0+273) K
= 298 K
use:
P * V = n*R*T
0.84 atm * V = 0.5726 mol* 0.0821 atm.L/mol.K * 298 K
V = 16.7 L
Answer: 16.7 L
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