An adult inhales approximately 12 times per minute, taking in about 500 ml of air with each inhalation. oxygen and carbon dioxide are exchanged in the lungs, but there is essentially no exchange of nitrogen. the exhaled air has a mole fraction of nitrogen of 0.75 and is saturated with water vapor at body temperature, 37°c. if ambient conditions are 25°c, 1 atm, and 50% relative humidity, what volume of liquid water (ml) would have to be consumed over a two-hour period to replace the water loss from breathing? how much would have to be consumed if the person is on an airplane where the temperature, pressure, and relative humidity are respectively 25°c, 1 atm, and 10%?

The first element on the periodic table of elements is carbon. a. true b. false

Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic

What is the percentage of hydrogen in nitrogen trihydride