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Determine the equivalent weight of each ...

Determine the equivalent weight of each given below, if formula weight of these compounds are `X,Y` and `Z` respectively:
(i) `Na_(2)SO_(4)`, (ii) `Na_(3)PO_(4). 12H_(2)O`
(iii) `Ca_(3)(PO_(4))_(2)`

A

`(X)/(2),(Y)/(3),(Z)/(6)`

B

`(X)/(2),Y ,(Z)/(3)`

C

`X,(Y)/(3),(Z)/(3)`

D

`X,Y,Z`

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