Please help me with the answer

Question

What pressure will be exerted by 15 g of carbon dioxide gas in a 20 L container at 0 °C?

Answer 1

PV = nRT; (pressure)(volume)=(numberofmol)(constant R)(temperature in Kelvin)

Given:

V= 20 L

T = 0 C = 273 K

n= 15 g of CO2

molar mass of CO2 is 44.01

15 g divided by 44 g/mol = 0.34

n= 0.34 mol

P=(0.34)(8.314)(273)/20 = 38.7 atm