I need help!

Iron chloride (FeClg) forms from a chemical reaction of Iron (Fe) and Chloride (C12). What goes in the blanks to make a balanced chemical equation? _ Fe + __Cl2 -->___ FeCl3 2 Fe + 3 Cl2 -->2 FeCl3 2 Fe + 1 Cl2 -->2 FeCl3 1 Fe + 3 Cl2 -->2 FeCl3 3 Fe + 2 Cl2 -->3 FeCl3 Question 10 (6 points) Listen Given this chemical equation: GaF3+ _ _- Cs --> ___ CSF+ ___ Ga a) Write out what numbers belong in each of these blanks to have a balanced chemical equation: b) How did you figure this out? c) How does the balanced equation show conservation of mass