Question

Carbon monoxide is a gas at 0 °c and a pressure of 1.58 × 105 pa. it is a diatomic gas, each of its molecules consisting of one carbon atom (atomic mass = 12.0 u) and one oxygen atom (atomic mass = 16.0 u). assuming that carbon monoxide is an ideal gas, calculate its density ρ.

Answer 1

Given temperature = $0^{0}C = (0^{0} + 273 )K = 273 K$

Pressure = 1.58 ×$10^{5} Pa$ ×$\frac{1 atm}{1.01325*10^{5}Pa}$

= 1.56 atm

$Density =\frac{PM}{RT}$

ρ = $\frac{(1.56 atm)(28.01 g/mol)}{(0.08206 L.atm/mol.K)(273 K)}$

= 1.95 g/L