**Answer 1**

1) …………( 4.65 x 10^24 / 6.02 x 10^23 ) = 7.7 moles of NO2……….

2)……………1.14 x 4 x 6.02 x 10^23 = 2.744 x 10^24 atoms in SO3 ( Note : 1 molecule of SO3 has 4 atoms , one of S and three of O ) ..

**Answer 2**

divide no. molecules by Avogadro’s number

atoms in 1.14 mol SO3 = mol SO3 x Avogadro’s no x 4