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How many moles of oxygen are present in 64 grams of oxygen?

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in Chemistry – Class 11 by (148k points)
How many moles of oxygen are present in 64 grams of oxygen?

(a) three moles

(b) two moles

(c) one mole

(d) 16 moles

The question was posed to me in unit test.

My query is from States of Matter topic in portion States of Matter of Chemistry – Class 11

1 Answer

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Best answer
Right choice is (b) two moles

Easy explanation: As we know that the number of moles of a gas is given by the amount of the substance in weight divided by the molecular weight of the substance. So in case of oxygen, it is 64 grams divided by 32 grams and that is two moles.

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