What do you know about a chemical compound by looking at its chemical
formula?
a the properties of the molecules in the compound
b how many molecules are in a sample
chow the compound reacts with other compounds
d the number and kinds of atoms in the compound

C how the compound reacts with other compounds.

Explanation:

a. as the temperature increases, the kinetic energy of the gas molecules increases & the molecules move faster & further away from each other.

b. if you decrease the temperature of a fixed amount of gas at constant pressure, the combined gas law reduces to charles's law. in this case, volume will also decrease.

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.