An atom of molecular weight m- 50 da is confined to a solid lattice at 25 c where it "sits" in a square well potential (hard walls on both sides) of free width 0.02 nm. what is its vibration or collision frequency? check with the literature to see whether your answer is reasonable. if it is not, explain why not. answer 13-1

The air we breath is made of mostly oxygen molecules

The horse latitudes-high-pressure zones about 30 degrees north and 30 degrees south of the equator.-warm air traveling away from the equator cools and sinks-weather tends to be clear and drythe doldrums-low-pressure near equator-air rises and spreads out toward the poles-rising moist air produces clouds and heavy rainthe westerlies-blow from the west-move from the horse latitudes toward the poles.-bring storms across much of the united statesthe tradewinds-blow from the east-move from the horse latitudes toward the equator  -strong, steady winds

Liquid. good luck : )