The density of a gaseous element is 5 times that of oxygen under similar
conditions. If the molecule of that element is triatomic, what is its
atomic mass?
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Answer:
Molecular mass of oxygen = 32
Vapour density of oxygen =
2
32
=16
Thus, vapour density of the gaseous element =16×5=80
Molecular mass of the gaseous element =80×2=160
As the molecule is triatomic, its atomic mass =
Atomicity
Mol.mass
=
3
160
=53.33
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