You are holding a plane mirror 1 meter in front of your eyes and are able to see a 15 meter tall tree
behind you. the image completely fills your 25 cm tall mirror. how far away from the tree are you
standing?
a) 15 meters b) 25 meters c) 30 meters d) 60 meters

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.

you need to have a picture of the atom that way we can answer it