Question

The number of molecules in one litre of water is (density of water = 1g/mL)​

Answer 1

Answer:

${\bold{Given \: that:-} }$

$\bold{Density \: of \: water = \frac{1g}{ml} }$

$\bold{Therefore,}$

$\bold{Mass=Density×volume=1×1000=1000g}$

$\bold{number \: of \: moles \implies \: \frac{mass}{molar \: mass} }$

$\bold{ \implies{ \frac{1000}{18} }}$

$\implies{ \bold{55.56}}$

$\bold{Number \: of \: molecules = 55.56 \times 6.022 = {10}^{23} }$

$\bold{ \implies{3.34 \times {10}^{25} }}$

Hope it helps you