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Oyheatod

Answer»

mass of MgSO4.xH2O is = 24+32+64+x(18) = 120+18x. now when it is heated, all the H2O will be removed. that is 18x

so loss in Mass is 18x/(120+18x) = 51.2/100 (given=51.2% loss of mass) => 18x/120+18x = 0.512 => 18x = 0.512(120+18x) so, 0.488*18x = 61.44 => x = 61.44/18*(0.488) = 6.999 = 7.



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