Which best describes nuclear fission? a.) A nucleus spontaneously splits and absorbs energy. b.) Two nuclei spontaneously combine and absorb energy. c.) A nucleus collides with a neutron and splits, releasing energy. d.) Nuclei combine to form a heavier nucleus, releasing energy.

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

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?

How can a mixture of salt water be separated into salt and water