the density of water is 1/mL. assuming that there are no interspaces between water molecules in liquid water, the volume of a water molecule is? (ans : 3 x 10^-23ml)

$$\begin{gathered} \text{Hi,} \\ \text{Density (d) = 1 g/ml} \\ \mathrm{mass}\mathrm{of}1\mathrm{ml}\mathrm{of}\mathrm{water}=1\mathrm{g} \\ \mathrm{Number}\mathrm{of}\mathrm{molecules}\mathrm{in}1\mathrm{gm}\mathrm{of}\mathrm{water}=\frac{1\times 6.022\times {10}^{23}}{18} \\ \mathrm{Volume}\mathrm{of}\frac{6.022\times {10}^{23}}{18}\mathrm{molecules}=1\mathrm{ml} \\ \mathrm{Volume}\mathrm{of}1\mathrm{molecule}=\frac{1}{\frac{6.022\times {10}^{23}}{18}}=\frac{18}{6.022\times {10}^{23}}=3\times {10}^{-23}\mathrm{ml} \\ \mathrm{Regards} \end{gathered}$$