We will use the ideal gas equation to find the mass.
An ideal gas mixture contains 35% helium, 20% methane, and 45% nitrogen (by volume) at 2.00 atm and 90°C. Calculate the mass fraction of methane.
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Our tutors have indicated that to solve this problem you will need to apply the The Ideal Gas Law: Molar Mass concept. You can view video lessons to learn The Ideal Gas Law: Molar Mass. Or if you need more The Ideal Gas Law: Molar Mass practice, you can also practice The Ideal Gas Law: Molar Mass practice problems.