What do you know about a chemical compound by looking at its chemical
formula?
A the number and kinds of atoms in the compound
B how the compound reacts with other compounds
DC how many molecules are in a sample
D the properties of the molecules in the compound
choice C would be tempting to choose but the the amount of molecules of a compound most of the time only 1 unless stated otherwise. The more obvious answer is that you can find the amount and kind of atoms in the compound.
