Mixtures can be separated by filtration and distillation. both methods take advantage of
similarities in the chemical properties of the mixture’s components
similarities in the physical properties of the mixture’s components
differences in the physical properties of the mixture’s components
differences in the chemical properties of the mixture’s components

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.

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg