Calculate the relative molecular weight of the following compounds: KNO2. MgCO3, CuSO4, Fe3O4.

| August 12, 2021 | education

Let’s calculate the relative molecular weight of the following compounds.

Let’s calculate for KNO2. Sodium nitrite.

Mr (KNO2) = Ar (K) + Ar (N) + 2Ar (O) = 39 + 14 + 16 * 2 = 85 g / mol.

Let’s calculate for MgCO3. Magnesium carbonate.

Мr (MgCO3) = Ar (Mg) + Mg (C) + 3Mg (O) = 24 + 12 + 16 * 3 = 84 g / mol.

Let’s calculate for СuSO4. Copper sulfate.

Мr (CuSO4) = Ar (Cu) + Ar (S) + 4Ar (O) = 64 + 32 + 4 * 16 = 160 g / mol.

Let’s calculate for Fe3O4. Iron oxide.

Mr (Fe3O4) = 3Ar (Fe) + 4Ar (O) = 3 * 56 + 4 * 16 = 232 g / mol.



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