15.2 grams of CO2 = ? molecules of CO2

2.11 molecules of CO₂

Explanation:

Given data:

Mass of CO₂ = 15.2 g

Molecules of CO₂ = ?

Solution:

Number of moles of CO₂:

Number of moles = mass/molar mass

Number of moles = 15.2 g/ 44 g/mol

Number of moles = 0.35 mol

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.

1 mole = 6.022 × 10²³ molecules

0.35 mol × 6.022 × 10²³ molecules / 1 mol

2.11 molecules of CO₂