For the chemical reaction c2h6 --> c2h4 + h2 + 137kj, the chemical energy of the a. reactant and the chemical energy of the products are equal. b. reaction cannot be calculated. c. reactant is greater than the chemical energy of the products. d. products is greater than the chemical energy of the reactant.

Dalton’s model of an atom is the best described as a) a solar system b) a solid sphere c) a cloud d) a scoop of chocolate chip ice cream

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

Oxygen and hydrogen gas are at the same temperature t.what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.