Please help me I need it now

Ok for the question you can make up your own

If you can't make up your own tell me so I can try my best to come up with questions

1. Since and last are adverbs so am not sure how that part going to go

Type of Adverb for since is: Time

Type of Adverb for last is : Time

2. Question:

happily

Type: Manner

Hopes this helps you.

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 compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements