Calculate the number of molecules in 6.7 moles of AlCl3

According to the Avogadro's law I mole of any substance contains = 6.023 x 1023

Number of molecules in one mole = 6.023 x 1023

Therefore number of molecules in 6.7 moles of AlCl3:

6.023x1023 molecules / 1.0 mole * 6.7 mole

= 40.3541 x 1023 molecules

= 4.03541 x 1024 molecules