An unknown gas shows a density of 3 g per litre at 273°C and 1140 mm Hg pressure. What is the gram molecular mass of this gas?

Cost of Sugar (C₁₂H₂₂O₁₁) is ₹40 per kg; calculate it's cost per mole.

Calculate the number of atoms present in :

(a) 10 g of Chlorine

(b) 10 g of Nitrogen

Correct the following:

(a) Equal volumes of any gas, under similar conditions, contain an equal number of atoms.

(b) 22 g of CO₂, occupies 22.4 litres at STP.

(c) The unit of atomic weight is grams.