Question

What is the percentage of oxygen present in the compound (a).

(Atomic mass of Cu = 63.5, N = 14, H =1, S = 32, C=12)​

Answer 1

Answer:

may be 21% is answer

hope it helps

Answer 2

Explanation:

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