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How to calculate the weight of oxalic acid (H2C2O4.2H2O)??

For me it is coming 132...but i don't think my ans is correct..

 

 its 126= 2+2*12+4*16+2(2+16).

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 how you did?? can explain me??

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oxalic acid has the molecular formula (cooh)2.2H2O,therefore its molecular mass is 45.2+18.2 i.e 90+36=126

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