Histidine is a polyprotic acid. , using excel to:
a. calculate fractions (αi ) of all the species as a function of ph in the range of 1-13. use the equations given below. calculate αi at every 0.2 ph unit to obtain a smooth plot. plot the fractional concentration vs. ph for all the species.
b. identify and mark species at all intersection points and peaks.

a chemical reaction

explanation:

a. they are both space stations

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a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.