Calculate the number of C atoms in 11g of carbon dioxide

1.51× 10²³ C atoms

Explanation:

Given data:

Mass of CO₂ = 11 g

Number of atoms in 11 g of CO₂  = ?

Solution:

First of all we will calculate the number of moles of CO₂ .

Number of moles = mass/ molar mass

Number of moles = 11 g/ 44 g/mol

Number of moles = 0.25 mol

One mole of  CO₂ contain 1 mole of C atom.

0.25 mole of CO₂ contain 0.25 moles of C atom.

The number of C atoms in 0.25 moles 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 .

11 g of CO₂ = 0.25 moles of C = 0.25 × 6.022 × 10²³ C atoms

1.51× 10²³ C atoms

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