A certain substance contains 60.0 % carbon, 5.0 % hydrogen, and 35.0 % chlorine by mass. Find its empirical formula.

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

Heat is the total potential energy of a substance that can be transferred. true false

What is the most common form of matter in the universe