Two step mole conversion (I need to fill in the boxes )

Balance this equation co2(g) + h2o (g) show that the balanced equation obeys the law if conversation of mass

Compare and contrast the bohr model and the electron cloud models of the atom.

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.