The molar mass of methane (CH4) is:, 16 g/mol, 16.0 g/mol, 16.042 g/mol, 16.04 g/mol, The molar mass of magnesium chloride (MgCl2) is:, 95.21 g/mol, 100.0 g/mol, 95 g/mol, 95.2 g/mol.

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