At atmospheric pressure and body temperature the lungs contain nitrogen, oxygen, carbon dioxide, and water vapor where pn, -573 mm hg, po, 100 mm hg, and ph, o-47 mm hg. a) what is the partial pressue of co2? b) what is the percent composition of the air inside the lungs? c) why is your number given above a percent by volume? d) the percent composition of air does not change appreciably with altitude. why, then, does one experience difficulty in breathing at high elevations?

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?