A space shuttle can carry 23 tons of cargo into space. If a shuttle is launched with 22 tons of cargo instead of 23, how does the shuttle’s motion change?

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 !

a chemical change results in a new substance being formed; whereas a physical change will result in a different state of matter

explanation: