Answer :

Molecular mass is the sum of the atomic masses of all the atoms present in one molecule of the substance.

1. H2O = (1gX2) + 16g = 18g


2. CO2 = 12g + (2 x16g) = 12 + 32 = 44g


3. NaOH = 23g + 16g + 1g = 40g


4. NO2 = 14 + (2 x 16) = 46g


5. H2SO4 = (1gx2) + 32g + (4x16g) = 98g


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