The air in our atmosphere contains, by volume, approximately 78% nitrogen, 21% oxygen, 1% argon, and all other gases at trace amounts (discounting pollution).

a. suppose we take the partial pressure of nitrogen in denver, co, which is about 0.686 atm. what is the total air pressure above the "mile-high city"?
b. further suppose we take this measurement on the hottest day of the year (99°f), using a 250 ml gas chamber barometer. how many moles of argon are in the sample taken?

How do temperature and salinity affect deepwater currents? as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.

What is calcium oxide+diphosphorus pentoxide--> calcium phosphate balanced

Which statement characterizes synthetic polymers? a. they come from animals and plants. b. they are found in nature. c. they are made in a lab. d. they are components of starch.