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Atomic Mass and Atomic Mass Unit

How many mole...

Question

How many moles are present in 80 grams of Oxygen gas?

A

2.0 moles

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B

2.2 moles

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C

2.5 moles

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D

3.8 moles

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Solution

The correct option is C
2.5 moles

2.5 moles

Molecular mass of diatomic oxygen gas is 32 grams.

Moles present in 80 grams of Oxygen gas = [80/32] = 2.5

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