?Fe + ? CI2 - ? FeCI3 balance
the equation

2 Fe + 3 Cl2 -> 2 FeCl3

Explanation:

Write out the problem and list how many of each element are on each side.

__Fe + __Cl2 -> __FeCl3

Fe = 1                 Fe = 1

Cl =2                  Cl = 3

As Cl needs changing on the reactants side, put a 3 in the __ space and write the problem again.

__Fe + 3 Cl2 -> __FeCl3

Fe = 1                 Fe = 1

Cl =6                  Cl = 3

Now fix the products side.

__Fe + 3 Cl2 -> 2 FeCl3

Fe = 1                 Fe = 2

Cl =6                  Cl = 6

Now fix the reactants again.

2 Fe + 3 Cl2 -> 2 FeCl3

Fe = 2                 Fe = 2

Cl =6                  Cl = 6

Hope this helps!

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.