Enter your Name:   Enter your E-mail Address:  01. Define the following terms: a. Electrolysis b. Polar molecule c. Solvent d. Solute e. Cohesion f. Hard water 02. What is the chemical formula for water? 03. Some metals tend to absorb oxygen but not hydrogen. Suppose such a metal was covering the battery in an electrolysis experiment like Experiment 4.1. Which is the more likely erroneous result: HO2 or H40? 04. Why is water a liquid at room temperature when all other chemically similar substances are gases at room temperature? 05. Carbon dioxide (CO2) is one of the gases that we exhale when we breathe. Carbon monoxide (CO) is a poisonous gas associated with burning things under conditions of low oxygen. How many atoms are in one molecule of CO2? How many atoms are in one molecule of CO? 06. The principal component of gasoline is octane, whose molecules are composed of eight carbon atoms (C) and eighteen hydrogen atoms (H). What is the chemical formula? 07. Why are water molecules polar? 08. If a substance does not dissolve in water, is it ionic, polar, or nonpolar? 09. If a substance dissolves in water, will it dissolve in vegetable oil, a nonpolar substance? 10. Is hard water the result of a city's water treatment process?