Answer:
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
