Question

8g of O₂ - Calculate the number of particles in it.

Answer 1

Number of Moles = Given Number of particles / Avogadro Number

Molar mass of Oxygen Molecule = 32 g

Given mass = 8 g

Number of moles = 8 / 32 = 0.25 moles

Substituting the answer in the first equation we get,

0.25 moles = Given number of particles / Avogadro number

=> 0.25 * Avogadro number = Given number of particles

=> 0.25 * 6.022 * 10²³ = Given number of particles

=> 1.5055 * 10²³ = Given number of particles

Hence number of particles = 1.5055 * 10²³.