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Suppose the elements X and Y combine to ...

Suppose the elements X and Y combine to form two compounds `XY_(2)` and `X_(3)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

A

30,20

B

40,30

C

60,40

D

20,30

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