You are driving your vehicle through a busy intersection. a vehicle drives across your path. you cannot avoid crashing into the other vehicle. what type of crash should minimize the severity of the injuries and damage that occur?

Brace of Impact

Explanation:

Various researches have  shown that people who are aware of a collision and brace before the impact have less injury and long term outcomes. So people should brace for impact as when you brace the muscles in your neck can better protect the nerves, discs and ligaments and if you stay relaxed then these ligaments, discs, nerves will take more force and would result in more injury.

n2(g) + 3h2-> 2nh3(g)   this is the balanced equation

note the mole ratio between n2, h2 and nh3.   it is 1 : 3 : 2   this will be important.

moles n2 present = 28.0 g n2 x 1 mole n2/28 g = 1 mole n2 present

moles h2 present = 25.0 g h2 x 1 mole h2/2 g = 12.5 moles h2 present

based on mole ratio, n2 is limiting in this situation because there is more than enough h2 but not enough n2.

moles nh3 that can be produced = 1 mole n2 x 2 moles nh3/mole n2 = 2 moles nh3 can be produced

grams of nh3 that can be produced = 2 moles nh3 x 17 g/mole = 34 grams of nh3 can be produced

note:   the key to this problem is recognizing that n2 is limiting, and therefore limits how much nh3 can be produced.