ideal gas law(1)

Pressure, P = 0.97 atm
Molar mass, M = 14 + 16x2 = 46 g mol⁻¹
density, d = ?
Gas constant, R = 0.082 atm L mol⁻¹ K⁻¹
Absolute temperature, T = 273 + 35 = 308 K

PV = nRT
PV = (m/M)RT
PM = (m/V)RT
PM = dRT
d = PM/(RT)

Density, d = 0.97 x 46 / (0.082 x 308) = 1.77 g L⁻¹