At a height of km above the earth's surface, an astronaut finds that the atmospheric pressure is about 1.20e-8 mmhg and the temperature is k. how many molecules of gas are there per milliliter at this altitude?

Awatershed is a piece of land that drains water into a particular stream, lake, or river. which of the following factors often negatively impacts the water quality in a watershed? a.) wetlands b.) pollution c.) irrigation d.)rainfall

Can someone list any possible solutions to air pollution ?

Which of the layers of the earth has the following three characteristics? i. it is made of molten rock. ii. it has currents that are constantly moving. iii. earth’s plates float on top of its currents.