Animals get energy from the food that they eat. However, when the molecules from the food enter your cells, how do the molecules turn in to energy? Question 3 options:

The glucose molecules from the food are broken down by the mitochondria in the cell to produce ATP which the cells use as energy.

The ATP is broken down into glucose which the cells use for energy.

Upon hitting the stomach, the food molecules are changed to energy molecules which fuel the body.

The cells absorb ATP from food and use it for energy.

The ATP is broken down into glucose which the cells use for energy.

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.

- decrease the number of plants and animals living in the water.