11. most reactions, including enzyme-catalyzed reactions, proceed faster at higher temperatures. however, for a given enzyme, the rate drops off abruptly at a certain temperature. account for this behavior. (5 points)

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.

elements make up everything, and they combine to make compounds.

the answer is c

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)