1. Which of the following is incorrect? (a) Gram molecular mass = one mole molecules (b) Gram atomic = one gram atom (c) 1 a.m.u = 1.66 x 10-24 g. = ê (d) Molecular mass of Oxygen is 32 a.m.u.
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What is the mass of one molecule of oxygen?
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Correct option is
A
5.31×10
−23
g
The molecular weight of oxygen is 32 g/mol.
Hence, one mole of oxygen weighs 32 g.
One mole of oxygen contains 6.023×10
23
molecules.
The mass of one molecule of oxygen is:
6.023×10
23
32
=5.31×10
−23
g.
Hence, option A is correct.
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Answer:
a
Explanation:
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