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If the masses of Cr and O are in ratio 13:12 in Cr03,then the ratio of O that combines with the same mass of Cr in Cr2O3 and Cr2O7 is 1)1:2 2)1:4 3)3:7 4)2:5

Answer» If the masses of Cr and O are in ratio 13:12 in Cr03,then the ratio of O that combines with the same mass of Cr in Cr2O3 and Cr2O7 is 1)1:2 2)1:4 3)3:7 4)2:5


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