750.0g of water that was just boiled (heated to 100.0°C) loses 78.45kJ of heat as it cools. what is final temperature of water?(75.0°C)

According to the law of conservation of mass, in a chemical reaction the total starting mass of all the reactants equal the total final mass of all the products. true or false?

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.

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.