A gas mixture contains 50% helium and 50% methane by volume at STP. Wh – InterviewSolution

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1.	A gas mixture contains 50% helium and 50% methane by volume at STP. What is the percentage by mass of methane in the mixture? 1. 20% 2. 40% 3. 60% 4. 80
Answer» A gas mixture contains 50% helium and 50% methane by volume at STP. What is the percentage by mass of methane in the mixture? 1. 20% 2. 40% 3. 60% 4. 80

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