If two gases are present in a container, the total pressure in the container is equivalent to the sum of the pressure that are exerted by each of the two gases. twice the sum of the pressure that are exerted by the individual gases. the sum of the pressure that each gas would exert if they occupied twice the volume. the sum of the pressure that each gas would exert if they occupied half the volume

The correct option is A

Explanation:

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 answer is na (sodium)