Which substance is an electrolyte?
(1) ch3oh (3) h2o
(2) c6h12o6 (4) koh

The answer is 4) KOH

Explanation:

Electrolytes are substances which ionize when dissolved in water. They are classified as:

Strong electrolyte: Which completely ionize when in water. Eg: NAOH, KOH (produces K+ and OH- ions when dissolved in water)

Weak electrolyte: partially ionize when in water. Eg: Acetic acid

Non-electrolyte: Do not ionize at all in water. Eg: Alcohols such CH3OH, sugars such as glucose (C6H12O6).

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.