HELP Place about 3 mL of 0.01 M acidified iron (II) sulfate, FeSO4, in a test tube.
Using a clean eyedropper, add 6 drops of 0.01 M potassium permanganate, KMnO4, 1 drop at a time, shaking the test tube after each additional drop.
What do the reactants look like?
What happens when the reactants are combined? Make observations concerning anything that might indicate a chemical reaction, such as production of a gas or a precipitate, color change or temperature change (did the test tube get cold or hot?).
Why do you think a reaction has, or has not, occurred?

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

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1 is the answer to this problem