# Number of Moles & Number of Particles (calculation 3)

Use this formula: How many formula units are there in 1 mole of sodium chloride?

1 mol NaCl = 6.02 x 1023 NaCl formula units

*1 mole of sodium chloride contains 6.02 x 1023 NaCl formula units.

How many formula units are there in 2 moles of sodium chloride?

2 mol NaCl = 2 x 6.02 x 1023 = 1.204 x 1024 NaCl formula units

*2 moles of sodium chloride contains 1.204 x 1024 NaCl formula units.

How many ions are there in 2 moles of sodium chloride?

2 mol NaCl = 2 x 6.02 x 1023 = 1.204 x 1024 NaCl formula units

2 mol NaCl = 2(2 x 6.02 x 1023)= 2(1.204 x 1024) = 2.408 x 1024 atoms

*2 moles of sodium chloride contains 2.408 x 1024 ions (combination of Na+ ions & Cl ions).

How many sodium ions are there in 2 moles of sodium chloride?

2 mol NaCl = 2 x 6.02 x 1023 = 1.204 x 1024 NaCl formula units

2 mol NaCl = 1(2 x 6.02 x 1023)= 1(1.204 x 1024) = 1.204 x 1024 Na+ ions

*2 moles of sodium chloride contains 1.204 x 1024 Na+ ions.

How many chloride ions are there in 2 moles of sodium chloride?

2 mol NaCl = 2 x 6.02 x 1023 = 1.204 x 1024 NaCl formula units

2 mol NaCl = 1(2 x 6.02 x 1023)= 1(1.204 x 1024) = 1.204 x 1024 Cl ions

*2 moles of sodium chloride contains 1.204 x 1024 Cl ions.

Note: 2 moles of sodium chloride contains 1.204 x 1024 Na+ ions & 1.204 x 1024 Cl ions. Therefore, the total number of ions in 2 moles of sodium chloride is 2.408 x 1024 ions.

(1.204 x 1024) + (1.204 x 1024) = 2.408 x 1024 ions