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Using rounded atomic masses (C=12, H=1), what is the molar mass of methane (CH4)?

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A) 32 g/mol

B) 17 g/mol

C) 15 g/mol

D) 16 g/mol

Answer: D

Explanation: Molar mass is the sum of atomic masses multiplied by the number of each atom. For CH4, add 1×12 + 4×1 to obtain 16 g/mol.

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