WBCS.LIVE practice question

If the vapour density of a gas is 32, what is its molecular weight?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 64
  2. 16
  3. 32
  4. 128

Correct answer and explanation

Correct answer: 64

Explanation: āœ… Correct Answer: A) 64 šŸ“š Explanation: The molecular weight of a gas is calculated using the simple relationship: Molecular Weight = 2 multiplied by Vapour Density. Since the vapour density is given as 32, we multiply it by 2. The calculation 2 multiplied by 32 results in 64. This fundamental rule of chemistry allows for the easy determination of a gas's mass based on its density relative to hydrogen.