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Question
Calculate the weight of one molecule of oxygen.
[Avogadro’s number = 6 × 1023, O = 16 ]
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Solution
Molecular weight of oxygen = 2 × 16 = 32 g/mol
Using Avogadro’s number
Weight of one molecule = `"Molecular weight"/"Avogadro’s number"`
= `32/(6 xx 10^23)`
= 5.33 × 10−23 g
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