Calculate the volume occupied by 320 g of sulphur dioxide at S.T.P.

[S = 32; O = 16]

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

Determine the number of molecules in a drop of water which weighs 0.09 g.

The molecular formula for elemental sulphur is S₈. In a sample of 5.12 g of sulphur:

(a) How many moles of sulphur are present?

(b) How many molecules and atoms are present?