Calculate the relative molecular weight of CaO, HNO3, CuSO4.
August 28, 2021
The relative molecular weight of a compound (M) is the sum of the relative atomic masses (A) of each element, taking into account the indices (n). (A) – determined by the periodic table.
M (CaO) = A (Ca) + A (O) = 40 + 16 = 56.
M (HNO3) = A (H) + A (N) + A (O) * 3 = 1 + 14 + 16 * 3 = 63.
M (CuSO4) = A (Cu) + A (S) + A (O) * 4 = 63.5 + 32 + 16 * 4 = 159.5.
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