1.

Suppose the elements X and Y combine to form two compounds XY_(2) and X_(2)Y_(2). When 0.1 mole of XY_(2) weighs 10 g and 0.05 mole of X_(3)Y_(2) weighs 9 g, the atomic weights of X and Y are

Answer»

40, 30
60, 40
20, 30
30, 20

Answer :A


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