Question

how many atoms are there in 1g of rhombic sulphur s8

Answer 1

1 Gram atom means one mole of the substance. Hence 8grams of sulphur contains0.25gram atoms of sulphur.

Answer 2

1 gm of rhombic sulphur is
$\frac{1}{32 \times 8} moles$
Moles × Avagadro number gives the no. of molecules

i.e Na×1/(32×8)

No. of molecules× no. of atoms in molecule gives total no. of atoms in that specific mole..

8Na×1/(32×8)
==》Na/32=6×10^23/32==》0.1875×10^23
==》1.875×10^22 atoms