Question

Total number of atoms represented by the compound $CuSO_4 . 5H_2O$ is

• A. 27
• B. 21
• C. 5
• D. 8

Answer 1

Answer: (B)

21

Answer 2

Total number of atoms in $CuSO_4 .5H_2O$ are 1+ 1 + 4 + 5 (2 + 1) = 6+ 5 $\times$ 3 = 21 $\therefore$ $CuSO_4 . 5H_2O$ has 21 atoms