1.

If isotopic distribution of C-12 and C-14 is 98% and 2% respectively, then the number of C-14 atoms in 12 g of carbon is

Answer»

`1*032xx10^(22)`
`3*01xx10^(22)`
`5*88xx10^(23)`
`6*02xx10^(23)`

Solution :In 12 g of CARBON, the amount of C-14
`=12xx2//100=0*24g`
`:.` C-14 atoms in `0.24g = (0*24xx6*02xx10^(23))/(14)`
`= 1*03xx10^(22)` atoms.


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