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2.5 mol CO2 ( 2 mol O / 1 mol CO2 ) ( 6.022 x 10^23 atom / mole ) = 3.011 x 10^24 atoms of oxygen

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 could be converted.

Answer : The correct option is, (a) [tex]4.52\times 10^{24}[/tex]

Explanation :

As we know that,

1 mole of substance contains [tex]6.022\times 10^{23}[/tex] number of atoms.

As we are given that:

The moles of [tex]CO_2[/tex] = 2.50 moles

Now we have to calculate the number of atoms present in [tex]CO_2[/tex] molecule.

In [tex]CO_2[/tex], there are 3 atoms in [tex]CO_2[/tex] molecule that means 1 atom of carbon and 2 atoms of oxygen.

As, 1 moles of [tex]CO_2[/tex] contains [tex]3\times 6.022\times 10^{23}[/tex] number of atoms.

So, 2.50 moles of [tex]CO_2[/tex] contains [tex]2.50\times 3\times 6.022\times 10^{23}=4.52\times 10^{24}[/tex] number of atoms.

Therefore, the number of atoms in 2.50 moles of [tex]CO_2[/tex] are [tex]4.52\times 10^{24}[/tex]

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