On a spring break road trip, 3 friends drive 480 miles to the beach. if their average speed is 60 miles per hour, how many hours did it take them to reach their destination?

8 hours

Explanation:

If they can go 60 miles every hour then in 8 hours they would have traveled 480 miles

60*8=480

we can do the inverse to check it

480/60=8

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 !

the answer is a and have a great day