An unknown gas has a density of 1.96 g L⁻¹ at 25 °C and 0.985 atm

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

An unknown gas has a density of 1.96 g L⁻¹ at 25 °C and 0.985 atm. What is the molar mass of the gas? (a)

24.5\ \text{g mol}^{-1}

(b)

49.8\ \text{g mol}^{-1}

(c)

43.9\ \text{g mol}^{-1}

(d)

12.9\ \text{g mol}^{-1}