Solid NaCl is produced by the reaction of metallic sodium with
chlorine gas. This reaction is also
accompanied by the release of heat
energy. Which equation shows this
reaction?

Newtons second law deals most cosely with

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

If you burn 10 kilograms of wood in a fire (combustion) what is the weight of the products after the fire has finished burning the wood?