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9 April, 01:42

The molecular mass of sodium oxide (Na2O) is

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  1. 9 April, 01:53
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    The answer is 62 u. The molecular mass of a molecule (Mr) is the sum of atomic masses (Ar) of its elements. Ar (Na) = 23 u. Ar (O) = 16 u. Therefore, the molecular mass of sodium oxide is 62 u: Mr (Na2O) = 2 * Ar (Na) + Ar (O) = 2 * 23 u + 16 u = 46 + 16 = 62 u.
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