A chemist has 2.0 mol of methanol (CH3OH). The molar mass of methanol is 32.0 g/mol. What is the mass, in grams, of the sample?

Use mass = amount in moles × molar mass. For 2.0 mol of methanol, the mass is 2.0 mol × 32.0 g/mol = 64 g. Therefore, the correct choice is 64 grams.

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