What is the percentage composition of water?

Water makes up about 70 percent of the human body. The water content in the body of male is more than that in the body of female, and the water content in the body of young people is more than that in the elderly. The water content in the body of newborn is about 70%~75% shui. The amount of water in human tissues is also different: about 10 percent of the water in bone and cartilage; Water in fat accounts for about 20%~35% of total fat; The distribution of water in muscles has reached up to about 70% of the total muscle mass. In the blood plasma, except 6%~8% of plasma proteins, 0.1% of glucose and 0.9% of inorganic salts, the rest are all water, accounting for about 91%~92% of the total plasma.

Explanation:

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.

sure im new too!

explanation: