6g of an impure sample of potassium chlorate gives 1.9g of oxygen on heating in presence of a catalyst. What is the percentage of purity of the sample. [K = 39,Cl = 35.5, O = 16]

5g of an impure sample of common slat on treatment with excess of AgNO_(3) solution yields 9.812g of AgCl . What is the percentgae impurity of that sample ?

2.5 g of an inpure sample of sodium bicarbonate when strongly heated gave 300ml of carbondioxide measured at 27^(@) and 760 mm pressure. Calculate the percentage purity of the sample. (Na=23, C=12, O=16).

9.7g of hydrated copper sulphate on heating loses 3.5 g of water. What is the percentage of water of crystallization?

20.0g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample (Mg=24)-

How much quantity of KClO_3 required to produce 5.6 lit oxygen at S.T.P.? [K = 39, Cl = 35.5, O = 16]

How much quantity of oxygen will be obtained when 24.5 gm potassium chlorate is heated? [K = 39 k, Cl = 35.5, O = 16]

20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample

0.316 g of an organic compound, after heating with fuming nitric acid and barium nitrate crystals in a sealed tube gave 0.466 g of the precipitate of barium sulphate. Determine the percentage of sulphur in the compound. (Atomic masses : Ba = 137, S = 32, O = 16, C = 12, H = 1).

10g of pyrolusite on reaction with conc. HCl liberated 0.1 equivalent of Cl_(2) . Percentage purity of pyrolusite sample-

A given sample of pure compound contains 9.81 gm of Zn, 1.8 xx 10^23 atoms of chromium and 0.6 mole of oxygen atom. What is the simple molecular formula of the sample ? [Atomic mass of Zn = 65.38]