Question

the minimum no. of molecules are in:
(1) 11.3litre (N.TP)SO2
(2) 1 mole SO2
(3) 10^23 SO2 molecules
(4) none of these
​

Answer 1

Correct option is

A

1.5 ×NA​

1 mole of any gas at STP has volume =22.4 L

Here, volume =11.2 L

⟹1 mole=22.4 L

⟹22.41​=1 L

⟹11.2 L=22.411.2​=0.5 moles

One molecule of SO2​ is made up of 3 atoms.

∴ No.of atoms =3×0.5×NA​=1.5×NA​