Answer
9.40L
Work Step by Step
At STP condition, temp= 273K, P = 1 atm
So by using the combined gas law
PV = nRT and the n from question 10.43a,
(n=0.42mol)
(1 atm)(V) = (0.42 mol)(0.08201)(273K)
Solving for V,
V = (0.42)(0.08201)(273)/(1)
= 9,4L