Question

the mass of one molecule of water is approximately

Answer 1

6.×10^23 water molecules have =18gm. 1 molecules have =18/6×10^23. =3×10^-23

Answer 2

Answer: Mass of one molecule of water is equal to $2.98\times 10^{-23}g$

Explanation:

According to the mole concept:

$6.022\times 10^{23}$ number of molecules is contained in 1 mole.

Mass of 1 mole of water = 18 g

$6.022\times 10^{23}$ number of molecules occupies 18 g of mass of water.

So, 1 molecule will occupy a mass of $\frac{18g}{6.022\times 10^{23}}\times 1=2.98\times 10^{-23}g$

Hence, mass of one molecule of water is equal to $2.98\times 10^{-23}g$