Answer:
the anwser is; B: increasing its speed
calculate the molar mass of Fe + 3(Cl)
that is your total mass
percent composition of FeCl3
mass % Fe = molar mass FE / total mass X 100 = %
mass % 3Cl = molar mass 3Cl / total mass X 100 = %
that is percent composition
Hope it’s help !!!!
Take a look at this and see if you can get an understanding and explain it in oxidation numbers
I believe it does contain both