A closed gas system initially has volume and temperature of 5920mL and 567.0C with the pressure unknown. If the same closed
system has values of 0.932atm, 4.46L and 371K, what was the
initial pressure in atm?
1.59 atm
0.629 atm
629 atm
1.07 atm

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 !