Acompound whose molecules contain one boron atom and three fluorine atoms would be named monoboron fluoride.

Boron trifluoride

Explanation: Because it has one Boron atom and Three fluorine which brings in the "tri"

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.

the ratio of the conjugate base to the acid required to attain the desired ph.