Answer the following stoichiometry question:

How many atoms in 4.75 moles of gold, Au?

936 atoms

41.5 atoms

2.86 x 10^ 24 atoms

1.27 x 10^ 23 atoms

2.86 * 10²⁴ atoms of gold

Explanation:

Given dа ta:

Number of moles of gold = 4.75 mol

Number of 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.

One moles of substance = 6.022 * 10²³ atoms

4.75 moles of gold = 4.75 * 6.022 * 10²³ atoms of gold

28.61 * 10²³ atoms of gold

2.86 * 10²⁴ atoms of gold