How many molecules are there in 36 g of FeF3?

36 g of FeF₃ contain 1.92 * 10²³ molecules.

Explanation:

Given dа ta:

Mass of FeF₃ = 36 g

Number of molecules = ?

Solution:

First of all we will calculate the molar mass of FeF₃.

Molar mass of FeF₃ = 55.845 + 18.998 * 3 = 112.84 g/mol

The number of molecules will be determine through the Avogadro number.

The number 6.022*10²³ is called Avogadro number and it is the number of atoms or molecules in one gram of atoms of an element or one gram molecules of a compound.

112.84 g of FeF₃ = one mole of FeF₃ = 6.022*10²³ molecules

36 / 112.84 * 6.022*10²³ molecules = 1.92 * 10²³ molecules

36 g of FeF₃ contain 1.92 * 10²³ molecules.