Determine the mass percentage composition of water (H=1. o=16).

A mixture containing 1.12 litre of H^2 and 1.12 litre of D^2 (deuterium) at STP is taken inside a bulb connected to another bulb by a stop-cock wilh a small opening. The second bulb is fully evacuated, the stop-cock is opened for a certain time and then closed. The first bulb is found to contain 0.05 g of H^2 . Determine the percentage composition by mass of the gases in the second bulb.

Calculate the percentage composition of calcium nitrate.

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

0.196 g of an organic compound gave 0.22 g of CO_(2) and 0.0675 g of H_(2)O . In carius determination, 0.3925 g of the substance gave 0.717 g of dry AgCl. Find the percentage composition of the substance.

On complete combustion, 0.246 g of an organic compound gave 0.198 g of CO_(2) and 0.1014 of H_(2)O . Find the percentage composition of the organic compound.

An organic compound contains C, H and O. 0.2475 g of the organic compound yielded on combustion 0.4950 g of CO_(2) and 0.2025 g of H_(2)O . Find the percentage composition of the organic compound.

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).

A substance on analysis, gave the following percentage composition, Na = 43.4%, C = 11.3%, 0 = 43.3% calculate its empirical formula [Na = 23, C = 12, O = 16].