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Common salt obtained from sea-water cont...

Common salt obtained from sea-water contains `8.775% Na Cl` by mass. The number of formula units of `NaCl` present in `25 g` of this salt is :

A

`3.367 xx 10 ^(23)"formula units"`

B

`2.258 xx 10 ^(22)"formula units"`

C

`3.176 xx 10 ^(23)"formula units"`

D

`4.73 xx 10 ^(25)"formula units"`

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