The molecular mass of a substance is the sum of the atomic masses of all the atoms in a molecule of the substance. It is therefore, the relative mass of a molecule expressed in atomic mass units (u).
Illustration : The relative molecular mass of water is 18 u, which can be calculated as
Atomic mass of Hydrogen= 1u
Atomic mass of oxygen =16u
The percentage by weight of Z in white vitriol, (Zn = 65, S = 32, O = 16, H = 1), is approximately | |||
Right Option : A | |||
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Which of the following is the relative molecular mass of H2 ? | |||
Right Option : B | |||
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Determine the molecular mass of ammonia (NH3) ? | |||
Right Option : C | |||
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