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Assuming the mass of the earth as 6.64xx...

Assuming the mass of the earth as `6.64xx10^(24)`kg Kg and the average mass of the atoms that make up the earth as 40 u ( atomic mass. Unit ) , the number of atoms in the earth is approximately

A

`10^(30)`

B

`10^(40)`

C

`10^(50)`

D

`10^(60)`

Text Solution

Verified by Experts

The correct Answer is:
C
`M_e = 6.64 xx10^(24) kg`
`n_1u_1 = n_2u_2`
`implies n xx 40 "amu" = 6.64 xx10^(24) kg`
`implies n xx40 xx1.6 xx10^(27) kg = 6.64 xx10^(29) kg`
`n = (6.64xx10^(29))/(40 xx1.6 xx10^(-27))~~10^(50)`
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