In Victor Meyor's method, 0.2 g of a substance displaced 63 mL of air at `16^@C` and 771 mm pressure. Calculated the molecular weight of the substance . At `16^@C` aqueous tension = 13.5 mm.

A solution containing 9.6 g of a substance in 100g of water boiled at 100.8^@C at 1 atm pressure. Calculate the molecular mass of substance. Calculate the molecular mass of substance. (Boiling elevation constant for water = 0.52^@C per 1000g of it)

2.5 g of pure calcium carbonate, when strongly heated left a residue of 1.400 g. The evolved gas was found to occupy 624 mL at 27^@ C and 755 mm pressure. Calculate the molecular weight of the gas.

Calculate the weight in g of 1270 mL CO_2 at 37^@C and at 700 mm pressure. Given: Molecular weight of CO_2 = 44 .

In Dumas' method for estimation of nitrogen, 0.3 g of an organic compound gave 50mL of nitrogen collected at 300 K temperature and 715 mm pressure. Calculate the percentage composition of nitrogen in the compound.(Aqueous tension at 300K=15 mm)

The relative lowering of vapour pressure produced by dissolving 71.5 g of a substance in 1000 g of water is 0.00713. The molecular weight of the substance will be:

At 720 mm pressure and at 27^@ C , 200 mL of gas weight 1.653g . Calculate its molecular weight using general gas equation.