The density of a certain gas is 1.98gdm-3 at s.t.p. What is the molecular mas…

Chemistry JAMB 2005

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 checkmark
  • 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
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