Answer:
7.11 x 10²³ atoms of oxygen
Explanation:
Given parameters:
Mass of Carbon dioxide = 52g
Unknown:
Number of oxygen atoms present = ?
Solution:
To solve this problem, we need to first find the mass of oxygen in the compound.
Molar mass of CO₂ = 12 + 2(16) = 44g/mol
Mass of oxygen = [tex]\frac{32}{44}[/tex] x 52 = 37.8g
Number of moles of oxygen = [tex]\frac{mass}{molar mass}[/tex] = [tex]\frac{37.8}{32}[/tex] = 1.18moles
So;
1 mole of a substance contains 6.02 x 10²³ atoms
1.18 mole of oxygen will contain 1.18 x 6.02 x 10²³ = 7.11 x 10²³ atoms of oxygen
