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 data:

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

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