Determine the molecular weight of the following substances MnO2, Li2S
| September 21, 2021 | education
Molecular mass is the mass of one molecule, which is calculated in atomic mass units. Molecular mass is obtained by adding the relative atomic masses of the elements of substances.
Mr (MnO2) = 55 + 16 * 2 = 82 grams / mol
Mr (Li2S) = 7 * 2 + 32 = 44 grams / mol
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