Question

The density of water is $1gm/ml$. The number of molecules present in $1litre$ of water $is$

• A. 18
• B. 18 x 1000
• C. 6.023 X 10²³
• D. 55.55 × 6.023 × 1023

Answer 1

The correct option is D

55.55 × 6.023 × 1023

$1lit.ofwater$ = $1000g$

No. of molecules = $\frac{W_t}{GM.W_t}\times n$

= $\frac{1000}{18}\times N$ = $55.55\times 6.023\times {10}^{23}$