Question

the number of atoms present in 0.5gram atom of nitrogen is the same as the atom in
options
1# 12gram of C
2# 32gram of S
3# 8gram of oxygen
4# 24gram of Mg​

Answer 1

8gram of oxygen

hope it's help

Answer 2

option 3 is correct
since 1 gram atoms contains 1 mole then 0.5 gram atoms conrains 0.5 mole. so 8 grams of oxygen contains 0.5 mole whereas others have 1 mole. therefore 3rd option is correct