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varsha valli g. (804)

Blazing goIITian

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m.wt of water content=249.17-159.6=89.57g
so there is 89.57 of water in 249.17g of hydrate.
amt of water x is in 3g of hydrate
x=89.57*3/249.17=1.07g
so wt of anhyd shud be 3-1.07=1.93g
but the wt is 2.00g
so error%=1.93*100/2 =96.5%
hope this helps
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Varsha be cool, tomorrow is what we make it today, so if u can dream it , u can make it . life is an ice cream ,eat it before it melts away!!!!!!!!!