Question

The density of water is $1.00$ g/ml at $4^{0}C$. Number of water molecules (as multiples of $N_o$) present in $18$ ml water at this temperature is __________.

Answer 1

Density of water = 1 g/ml

Mass of 18 ml water $=18\times 1=18gm$.

$\therefore$ Moles of water $=\frac{18}{18}=1mole$.

So, the number of water molecules $=N_o$.