Question

how many grams of zinc chloride could be formed from the reaction of 3.57 g of zinc with excess HCL

Answer 1

Zn + 2HCl ==> H2 + ZnCl2

mols Zn = grams/molar mass
Using the coefficients in the balanced equation, convert mols Zn to mols ZnCl2.
Now convert mols ZnCl2 to grams. g = mols x molar mass.

Answer 2

7.45

Answer 3

7.4422