Air is composed of about 79 mol% N2 and 21 mol% 02. What is the frequency of binary collisions of all kinds at 300 Kand 1 atm total pressure? The radius of N2 is 1.6 A and the radius of 02 is 1.5 A. Think of an approximate and simpler way to calculate the frequency of binary collisions of all kinds. How does your approximate answer compare with the one you calculated initially?

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by

Glucose (c6h12o6) is an important biological molecule. (round the answer to nearest hundredth.) what is the percent by mass of carbon in glucose?