In which of these reactions is energy released? exothermic reactions

all reactions

no reactions

endothermic reactions

For which one of the following reactions is the value of δh° rxn equal to δh° f for the product? a. 2 h2 (g) + o2 (g) → 2 h2o (l) b. n2 (g) + o2 (g) → 2 no (g) c. 2 h2 (g) + o2 (g) → 2 h2o (g) d. h2o (l) + 1/2 o2 (g) → h2o2 (l) e. none of the above

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?