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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_(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 

A

23,30

B

30,40

C

40,30

D

80,60

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