Gas law questions

Question

1. How many moles of gas are in 275mL containers with 1.00 atm at 73C?
2. What is the molar mass of the gas that is condensed into 0.697g of the liquid?

Answer 1

1.

P = 1.00 atm

V = 275 mL = 0.275 L

T = 73 °C = 73 +273.15 = 346.15 K

2. molar mass = (0.697 g)/(0.00968 mol) = 72 g/mol

(consistent with the hydrocarbon pentane, which is a gas at 73 °C)