Convert mass to moles for both reactants. (round to 2 significant figures.)
2.50 g CuCl2 equals
| moles
0.50 g Al equals
moles

Explanation:

Given parameters:

Mass of CuCl₂  = 2.50g

Mass of Al  = 0.50g

Unknown:

Number of moles of CuCl₂ and Al  = ?

Solution:

To solve this problem, we must understand that the number of moles is a fundamental property used in stoichiometry calculations.

         Number of moles  =

Molar mass of CuCl₂  = 63.6 + 2(35.5) = 134.5g/mole

Molar mass of Al  = 26.98g/mole

          Number of moles of  CuCl₂  =  = 0.019moles

        Number of moles of Al  =   = 0.019moles