Answer:
0.07 moles of water
Step-by-step explanation:
Given data:
Number of molecules of water = 4.22×10²²
Number of moles of water = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules of water
4.22×10²² molecules × 1 mol /6.022 × 10²³ molecules
0.7 ×10⁻¹ mol
0.07 moles of water