Calculate the activation energy for vacancy formation in Al given that the equilibrium number of vacancies at a temperature of 773 K is 7.57 X 1023 m-3 . The atomic weight and density of Al are, respectively, 26.98 g/mol and 2.62 g/cc.

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.