34g of pure `H_(2)O_(2)` is decomposed. Calculate the mass and volume of NTP of oxygen that will be evolved.

Calculate the volume of 20 g of hydrogen gas at NTP.

Calculate the volume of oxygen at NTP will react with 1.0 g of calcium

KCIO_3 on heating decomposes to KCI and O_2 . Calculate the mass and volume of O_2 produced by heating 50 g of KCIO_3 .

Solid ammonium dichromate (relative molecular mass = 252) on heating decomposes as follows : (NH_(4))_(2)overset(Delta)toN_(2)+Cr_(2)O_(3)+4H_(2)O Calculate the volume of nitrogen at S.T.P., that will be evolved when 31.5 g ammonium dichromate is heated.

An acidic solution of Cu^(2+) ions containing 0.4 g of Cu^(2+) ions is electrolysed until all the copper is deposited. Calculate the volume of oxygen evolved at N.T.P.

3.4 gm of H_(2)O_(2) decomposes, the weight of oxygen liberated from it is

When 20 ml of 2.5" M "H_(2)O_(2) aqueous solution is decomposed the S.T.P. volume of oxygen obtained is