List some ways houses would be built differently if gravity were much stronger or weaker

Gravity plays an important role in how we build our houses and structures. If gravity was much weaker on Earth, we would be able to use structures that are not as resistant. Buildings would not have to carry as much weight, which would mean that weaker materials would be able to be used.

On the other hand, much stronger gravity would mean that buildings would have to endure a lot more pressure. Moreover, everything inside the building (furniture, people, etc.) would be heavier, which would require stronger structures.

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:

by the combination of an unlimited number of elements