How many moles of CaCl2 are produced when this reaction is started with 4.70 grams of chlorine gas?

Answer 1

What reaction?

Answer 2

Ca+Cl2->CaCl2

Answer 3

Ca + Cl2 -> CaCl2
mols Cl2 = grams/molar mass = ?
Then use the coefficients in the balanced equation to convert mols Cl2 to mols CaCl2.