When iron metal reacts with sulfuric acid, it produces iron (III) sulfate and hydrogen gas. Balance the equation: Fe + H2SO4 → Fe2(SO4)3 + H2. Explain why it is necessary to balance chemical equations and why coefficients can be added to an equation, but subscripts cannot be changed.

2Fe + 3H₂SO₄ → Fe₂(SO₄)³ + 3H₂

It is necessary to balance chemical equations to obey the Law of Conservation of Matter.

Coefficients can be added to to show how many molecules are in a chemical. You can't change the subscripts because if you change the subscripts, you are changing the amounts of an element are in the chemical equation.

Explanation:

The numbers you use to balance the equation are 2,3,1, and 3.

LOCOMass(a.k.a-" The Law of Conservation of Matter") states that matter cannot be created or destroyed in any situation. If you have 12 atoms of a substance, you must get 12 back out. We balance the equations to make sure of that.

I already did the second question(it's basically an explanation within the answer itself).

Also, if you have trouble with balancing equations, I recomment making a small T chart of all your reactants and products of each element in an equation to better help understand what needs to be changed.

hope this helps!!

the answer is   c.) 1575 j.

explanation: