What is the effect of adding more water to the following equilibrium reaction? a. more h2co3 is produced. b. co2 concentration increases. c. the equilibrium is pushed in the direction of reactants. d. nothing

Which of the following statements is true? a. most heat energy is easily recovered and used for useful actions. b. friction causes molecules to vibrate more slowly. burning air and gasoline in an c. engine changes chemical energy into mechanical energy. it is impossible to d. change mechanical energy into mechanical energy.