Question

Convert mass to moles for both reactants. (Round to 2 significant figures.)

2.50 g CuCI2 equals... moles
0.25 g AI equals... moles

Answer 1

2.50 g CuCl2 equals 0.019 moles

0.25 g Al equals 0.0093 moles

Explanation: :-)

Answer 2

Mass = mr x moles
Mr of CuCl2 = ( 63.5) + ( 35.5 x 2) = 134.5
2.5 = 134.5 x moles
2.5 / 134.5 = moles
Moles = 0.019 (2DP)

0.25g of Al
Mr of Al = 27
0.25 = 27 x moles
0.25/ 27 = 0.0093 moles (2sf)

Hope this helps :)