Answer:
36 g of FeF₃ contain 1.92 ×10²³ molecules.
Explanation:
Given data:
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 .
