1.

26.8gm of Na_(2)SO_(4) nH_(2)O contains 12.6gm of water. The value of 'n' is:

Answer»

1
10
6
7

Solution :`Na_(2)SO_(4).nH_(2)O`
Molar mass `=(1.42+18N)`
Mass of WATER`=(12.6)/(26.8)xx(142+18n)`
`18n=(12.6)/(26.8)xx(142+18n)`
n=7


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