Rank the following covalent bonds in order of decreasing polarity: C-H, N-H, O-H, and F-H. a. C-H > N-H > O-H > F-H b. F-H > O-H > N-H > C-H c. O-H > F-H > N-H > C-H d. N-H > F-H > O-H > C-H e. C-H > F-H > O-H > N-H

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

b) mutualism

hope this : )