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Suppose the elements X and Y combine to ...

Suppose the elements X and Y combine to form two compounds of `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 , what are tha atomic masses of X and Y ?

A

40, 30

B

60.4

C

20, 30

D

30, 20

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A
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