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MissPhiladelphia
Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles.

  4.75×10^24 gold atoms ( 1 mol / 6.022x10^23 atoms ) = 7.888 mol gold

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Answer:

There are 7.8877 moles of gold.

Explanation:

Let the moles of gold be x

Number of gold atoms = [tex]4.75\times 10^{24}[/tex]

Number of atoms In 1 mole = [tex]N_A=6.022\times 10^{23}[/tex]

Then number of atoms in x moles of gold :

[tex]x\times 6.022\times 10^{23}=4.75\times 10^{24}[/tex]

x = [tex]\frac{4.75\times 10^{24}}{6.022\times 10^{23}}=7.8877 mol[/tex]

There are 7.8877 moles of gold.

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