What parts are present in every chemical equation?

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

What state of matter is ice a. liquid b. element c. solid d. gas

Anyone who's in connections academy chemistry b have the factors that affect the rate of a reaction portfolio already done?