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KCET2020ChemistryStates of Matter

A gas mixture contains 25 % He and 75 % CH ₄ by volume at a given temperature and pressure. The percentage by mass of methane in the mixture is approximately____

Options

  1. A75 %
  2. B25 %
  3. C92 %
  4. D8 %

Correct answer

C. 92 %

Step-by-step solution

Gas mixture contains 25 % He and 75 % CH ₄ by volumes. We have to calculate the mass percentage of methane in the mixture. molar mass of He =4 molar mass of CH ₄=16 Mass percentage of methane in the mixture shall be = 75 16 25 4+75 16 100=92 %

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