What is the limiting reactant when 19.9 g of cu0 are exposed to 2.02 g of H2 according to the following equation

One significant difference between an ionic bond, where electrons are taken from one atom and added to another atom, and a covalent or metallic bond, where electrons are shared is

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

Will mark brainliest how many electrons can be held in the energy level n = 4?