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Question

The molecular mass of the compound SO2 is:

A
16 u
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B
48 u
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C
32 u
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D
64 u
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Solution

The correct option is D 64 u
Molecular mass of a substance is the sum of the atomic masses of its constituent atoms.
Molecular mass of SO2
= Atomic mass of S + 2×(Atomic mass of O)
= 32+(2×16)
= 64 u.

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