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Two elements x and y form two types of m...

Two elements x and y form two types of molecules like `xy_(3)` and xy. 1 gm of `xy_(3)` lowers the freezing by `1^(@)C` when dissolved in 100 gram solvent whereas for the same lowering in freezing point for same amount of solvent 0.5 gram xy is required. Calculate atomic mass of x and y . (Gram : `k_(f)` for solvent is `5" K molal"^(-1)`)

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