if you want to know the identity of an unknown substance, what type of formula would you most likely want to know?

Smell: Most chemists can identify solvents by their distinctive smells (though this is a pretty bad idea). ¹

Melting point: If you've got very pure crystals, you can use their melting point to figure out which of several possible chemicals you've got.

Explanation:

I hope this helps and pls mark me brainliest :)

b i think it’s a water wheel turning in a stream

c. orbital shape i hope this is correct