Calculate the relative molecular weight of the elements: Na3PO4, Cu2S, CaO.
| December 19, 2020 | education
The molecular weight is the sum of the totality of the atomic masses of the atoms included in the substance
M (Na3PO4) = 23 * 3 + 31 + 16 * 4 = 164 g / mol
M (Cu2S) = 64 * 2 + 32 = 160 g / mol
M (CaO) = 40 + 16 = 56 g / mol
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