The density of a certain gas is 1.98gdm-3 at s.t.p. What is the molecular mas of the gas?
-
44.0 g
- 54.0 g
- 26.0 g
- 31.0 g
The correct answer is: A
Explanation
Density = mass/volume∴ 1.98 = molecular mass/22.4
molecular mass = 1.98 * 22.4 = 44.35 ≅ 44.05