A scholar is worried about global warming. What is one way he could reduce his carbon footprint? A He could walk to school instead of riding to school in a car.
B He could eat more meat and fewer vegetables.
He could keep his phone fully charged all the time.
D He could switch to using styrofoam plates and plastic utensils for his meals.

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 !

lol for the pointsss