A proposed car air bag uses a canister of CO2 gas to inflate a 54 L bag at 20 ∘C and 1.04 atm pressure. What mass of CO2 must the canister contain? Express your answer to two significant figures.
Given:
P = 1.04 atm
V = 54.0 L
T = 20.0 oC
= (20.0+273) K
= 293 K
find number of moles using:
P * V = n*R*T
1.04 atm * 54 L = n * 0.08206 atm.L/mol.K * 293 K
n = 2.336 mol
Molar mass of CO2,
MM = 1*MM(C) + 2*MM(O)
= 1*12.01 + 2*16.0
= 44.01 g/mol
use:
mass of CO2,
m = number of mol * molar mass
= 2.336 mol * 44.01 g/mol
= 1.028*10^2 g
Answer: 1.0*10^2 g
A proposed car air bag uses a canister of CO2 gas to inflate a 54 L...
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