Which two substances can not be broken down by chemical change?
(1) c and cuo (3) co2 and cuo
(2) c and cu (4) co2 and cu

Acycloalkane molecule contains 8 carbon atoms. how many hydrogen atoms are present in the molecule?

How does the motion of particles in a gas change as the gas cools

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j