Find the relative molecular weight of NaNO3.
| April 18, 2021 | education
The relative molecular weight of a substance (Mr) is calculated as the sum of the relative atomic masses (Ar) times the number of atoms. The sodium nitrate (NaNO3) molecule has one sodium atom, one nitrogen atom and three oxygen atoms.
Mr (NaNO3) = Ar (Na) + Ar (N) + 3 Ar (O) = 23 + 14 + 3 × 16 = 85
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