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H(2) gas is often used as a reducing gas...

`H_(2)` gas is often used as a reducing gas. In a particular set up 17.4 gm of `MnO_(2)` on reacting with excess of hydrogen gas gives water and new oxide `Mn_(x)O_(y)` such that mass of the oxide obtained is 12.6 g. What will be value of y if x is 2. `[Mn=55]`

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