Answer:
Explanation:
Given data:
Number of moles of NaOH = 2 mol
Number atoms = ?
Solution:
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.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
So in 2 mol of NaOH:
1 mol = 6.022 × 10²³ molecules of NaOH
2 mol × 6.022 × 10²³ molecules NaOH / 1mol
12.044 × 10²³ molecules NaOH
we can determine the number of atoms of each elements.
one mole of NaOH contain 1 mole sodium atom one mole hydrogen atom and one mole of oxygen atom.
1 mol = 6.022 × 10²³ H atoms
1 mol = 6.022 × 10²³ O atoms
1 mol = 6.022 × 10²³ Na atoms
So 2 mol,
2 mol =2 × 6.022 × 10²³ H atoms = 12.044 × 10²³ H atoms
2 mol =2 × 6.022 × 10²³ O atoms = 12.044 × 10²³ O atoms
2 mol =2 × 6.022 × 10²³ Na atoms = 12.044 × 10²³ Na atoms
Total = 36.132 × 10²³ atoms
