Mass of each component

Question

In a 65.0-g aqueous solution of methanol, CH4O, the mole fraction of methanol is 0.210.

What is the mass of each component?

Answer 1

Easiest way is to take a basis of 1 mole of mix: .21 moles methanol and .79 moles of water

Convert each to grams using their molar mass (g/mole)

The mass of each ingredient in the mixture will be 65g x mass of the ingredient in the mole basis/(mass of methanol and water in the mole basis)

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