Water vapor is a component in air and can enter tires when an air compressor or air pump is used to fill a tire. Your friend mentions having water in her tire after using the air pump at a local gas station. If she stores her bicycle outside overnight in a cold temperature, what would happen to the water vapor?

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 !

sure im new too!

explanation: