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The number of atoms in 52g of He is-...

The number of atoms in 52g of He is-

A

`78.299xx10^(24)` atoms

B

`7.820xx10^(-24)` atoms

C

`7.829xx10^(24)` atoms

D

`78.234xx120^(25)` atoms

Text Solution

Verified by Experts

The correct Answer is:
C
Number of atoms`=(N_(A)xxmass)/("at. Mass")`
`=(6.023xx10^(23)xx52)/(4)=7.829xx10^(24)` atms
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