Calculate the percentage composition of calcium nitrate.

1.5g of a mixture of CaCO_(3) and MgCO_(3) , on ignition, produces 360mL of CO_(2) at STP. Calculate the percentage composition of the mixture.

1.84 g of a mixture of CaCO_(3) and MgCO_(3) was heated to a constant weight. The constant weight of the residue was found to be 0.96g. Calculate the percentage composition of the mixture. (relative atomic masses of Ca and Mg are 40 and 24 respectively).

A mixture-of 1.5 gm calcium carbonate and magnesium carbonate is strongly heated form 360 ml of carbondioxide at S.T.P. calcualte the percentage composition of the mixture. [C = 12, M = 24]

Calculate the percentage composition of the compound having the molecular formula of C_(6)H_(12)O_(6)(H=1,C=12,O=16) 0.

Calculate the percentage composition of the compound having the molecular formula of C_6H_12O_6 (H = 1, C =12, O = 16).

The equivalent mass of calcium in calcium oxide is 20. find the percentage composition of calcium oxide.

Calculate the percentage composition (by mass) of the constituent elements of sodium sulphate (Na_(2)SO_(4)) .

The composition of duralumin is

The composition of carnallite is -

0.592 g of calcium oxalate was dissolved in dilute acid and the solution was made up to 250 mL. 25 mL of this solution required 8.375 mL of 0.1 N KMnO_4 solution for complete oxidation. Calculate the percentage of calcium oxalate in calcium oxalate sample.