Calculate the equilibrium concentration of H3O in a 0.20 M solution of oxalic acid. Express your answer to two significant figures and include the appropriate units.

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 is the rate law for the uncatalyzed reaction?

What type of energy conversion occurs when you place your feet near the fire place and they become warm