Question

Which of the following contain more number of atoms:

(i) 10g of copper

(ii) 10g of nitrogen

(iii) 10g of sulphur

(atomic mass of Cu= 63.5u, N= 14u, S= 32u)
please answer urjent

Answer 1

Molecular mass of a compound is the sum of atomic masses of each element present in the molecule. 

Molecular mass = atomic mass of Cu + atomic mass of S + (9 × atomic mass of O) + (10 × atomic mass of H) =63.5+32+9×16+10×1=249.5 gm/mole

Answer 2

Answer:

the correct answer is (ii)