Which lewis electron-dot diagram represents calcium oxide

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?