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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 mol He (  6.022 x 10^23 atoms / mole ) = 2.4088 x 10^34 atoms He

Answer:

Number of atoms in 4.00 moles of helium = [tex]2.4092\times 10^{24}[/tex]

Explanation:

Avogadro’s number represent the number of the constituent particles which are present in one mole of the substance. It is named after scientist Amedeo Avogadro and is denoted by [tex]N_0[/tex].

Avogadro constant:-

[tex]N_a=6.023\times 10^{23}[/tex]

Thus,

1 mole of helium contains  [tex]6.023\times 10^{23}[/tex] atoms

So,

4.00 moles of helium contains  [tex]4.00\times 6.023\times 10^{23}[/tex] atoms

Number of atoms in 4.00 moles of helium = [tex]2.4092\times 10^{24}[/tex]

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