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Common salt obtained from sea water cont...

Common salt obtained from sea water contains 96% NaCl by mass. The approximate number of molecules present in 10.0 g of the salt is

A

`10^(21)`

B

`10^(22)`

C

`10^(23)`

D

`10^(24)`

Text Solution

Verified by Experts

The correct Answer is:
C
Mass of NaCl present in 10.0 g of salt `= ( 10 xx 96 )/(100) =9.6 g `
Number of molecules present
= Number of moles `xx` Avogadro.s number
`=( 9.6 )/( 58.5 ) xx 6.023 xx 10^(23) ~~ 10^(23) ` molecules
(Molecular weight of NaCl = 58.5)
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