Question

Calculate the number of moles of Cl atoms in 3.01×1024 formula units of magnesium chloride, MgCl2.

Answer 1

The number of moles of Cl atom is calculated by use of avogadro constant = 1 moles = 6.02 x10^23
what about 3.01 x10^24

(3.04 x10^24)/ ( 6.02 x 10^23) = 5 moles

5 moles is for CL atom what about CL2 in MgCl2 = 2 x 5 = 10 moles

Answer 2

Answer: 10 moles
To find how many moles, you need to divide the number of atoms with 6.02 * 10^23. Since every magnesium chloride has two chlorine atoms, you need to multiply it by 2. The calculation would be: 3.01×10^24 * 2 / 6.02 * 10^23= 10 moles