Suppose the elements X and Y combine to form two compounds X Y 2 and X 3 Y 2 . When 0 . 1 mole of X Y 2 weighs 10 g and 0 . 05 mole of X 3 Y 2 weighs 9 g , the atomic weights of X and Y areNEET 2016 (

Question

Suppose the elements X and Y combine to form two compounds X Y 2 and X 3 Y 2 . When 0 . 1 mole of X Y 2 weighs 10 g and 0 . 05 mole of X 3 Y 2 weighs 9 g , the atomic weights of X and Y areNEET 2016 (Phase 2)

TestHub · Accepted Answer

For X Y 2 , ∵ 0.1 m o l e of X Y 2 = 10 g ∴ 1 m o l e of X Y 2 = 100 g and X + 2 Y = 100 ...(i) For X 3 Y 2 , ∵ 0.05 m o l e of X 3 Y 2 = 9 g ∴ 1 m o l e of X 3 Y 2 = 180 g and 3 X + 2 Y = 1 8 0 ...(ii) On solving, X = 40 and Y = 30 .

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