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Question
Define the following terms:
(i) Atomic mass
(ii) Molecular mass
(iii) Formula mass
(i) Atomic mass
(ii) Molecular mass
(iii) Formula mass
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Solution
(i) The mass of an individual atom of an element is known as its atomic mass.
(ii) The molecular mass of a substance is the sum of the atomic masses of the atoms present in that molecule or compound.
(iii) The formula mass of a substance is the sum of masses of all ions in a formula unit.
(ii) The molecular mass of a substance is the sum of the atomic masses of the atoms present in that molecule or compound.
(iii) The formula mass of a substance is the sum of masses of all ions in a formula unit.
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