How many molecules of carbon dioxide are present in 388.1 grams

53.11  × 10²³ molecules of CO₂

Explanation:

Given data:

Mass of CO₂= 388.1 g

Number of molecules = ?

Solution:

Number of moles of CO₂:

Number of moles = mass/molar mass

Number of moles = 388.1 g/ 44 g/mol

Number of moles = 8.82 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

8.82 mol × 6.022 × 10²³ molecules / 1 mol

53.11  × 10²³ molecules of CO₂