How many molecules of carbon dioxide, CO2, are present in 388.1 grams?

53.11 * 10²³ molecules

Explanation:

Given dа ta:

Number of molecules of CO₂ = ?

Mass of CO₂ = 388.1 g

Solution:

Formula:

Number of moles = mass / molar mass

Molar mass of CO₂ = 12 * 1 + 16*2

Molar mass of CO₂ = 44 g/mol

Now we will put the values in formula.

Number of moles = 388.1 g / 44 g/mol

Number of moles = 8.82 moles

Now we will calculate the number of molecules 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.

1 mole = 6.022 * 10²³ molecules

8.82 mol * 6.022 * 10²³ molecules / 1 mol

53.11 * 10²³ molecules