Afixed amount of material a is added to a tank; then a fixed amount of material b is added to the tank containing material a. upon heating and stirring, the two react to form c. the reaction works best if just a small amount of b is added to a at a time. add the appropriate instrumentation to the process and draw a p& id depiction of the process using drawing software such as microsoft visio

the answer is either b or c

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.