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Mole Concept and Avogadro's Number

The number of...

Question

The number of molecules in 4 grams of $C O_{2}$ is..........

1 N_{o}

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0.4 N_{o}

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0.1 N_{o}

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0.8 N_{o}

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Solution

The correct option is B $0.1 N_{o}$
The number of molecules in 4 grams of $C O_{2}$ $= N o . o f m o l e s * N_{o} = (4 / 44) * N_{o} = 0.1 N_{o}$
(As each mole contains $N_{o}$ molecules)

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