What is the identity of a gas that has a density of 14975 gL

What is the identity of a gas that has a density of 1.4975 g/L and a volume of 8.64 L at a pressure of 2.384 atm and with a temperature of 349.6 Kelvin?

A) H2O B) N2 C) SO2 D) NO3 E) Cl2

Solution

P * molar mass = density * R * T

2.384 * molar mass = 1.4975 * 0.0821 * 349.6

2.384 * molar mass = 43.0

molar mass = 43.0 / 2.384 = 18.0 g/mol

Therefore, the gas would be H2O