1.

When 7.1gm Na_(2)SO_(4) (molecular mass 142) dissolve in 100 ml H_(2)O, the molarity of the solution is

Answer»

2.0 M
1.0 M
0.5 M
0.05 M

Solution :Molarity `=(w XX 1000)/(ml WT. xx "VOLUME ml.")=(7.1xx1000)/(142xx100)=0.5 M`.


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