(a) The relative atomic mass of CL atom is 35.5 a.m.u8. Explain this statement.
(b) What is th value fo Avogadro's number?
(c) What is the value of molar volume fo a gas at S.T.P.?

(a) The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.
(b) What is the value of Avogadro's number?
(c) What is the value of molar volume of a gas at STP?

(a) The mass of 5.6 litres fo a certain gas at STP is 12 g. What is the relative molecular mass or molar mass of the gas?
(b) Calculate the volume occupied at S.T.P. by 2 moles of $S{O}_2$

Define or explain the terms:
(a) Vapour density,

(b) Molar volume,
(c) relative atomic mass,

(d) relative molecular mass,
(e) Avogadro's number,

(f) Gram atom,
(g) Mole.

Following question refer to one mole of chlorine gas.
(a) What is the volume occupied by this gas at STP?
(b) What will happen to volume of gas, if pressure is double?
(c) What volume will it occupy at ${273}^{\circ }C$?
(d) If the relative atomic mass of chlorine is 35.5, what will be the mass of 1 mole of chlorine gas?

Define the terms:
(a) vapour density
(b) molar volume
(c) relative atomic mass
(d) Avogadro's number
(e) relative molecular mass