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Practice Problems and Examples from Chapter 1
Practice Problems and Examples from Chapter 1
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Chemistry Chapter 1 Exercises and Problem Solving Practice ProblemsExercise 1.1 Temperature
a.) Which is the highest temperature, 37℃ or 85℉?
● 85℉
b.) Which is the lowest temperature, 20℉ or 0℃?
● 20℉
c.) The boiling point of a substance is 15℃. If you hold a sample of the substance in your hand, will it boil?
● Yes, it will boil because a normal body temperature is around 37℃.
Topics: 1.3.3 Temperature
Notes: Comparing Fahrenheit to Celsius
Exercise 1.2 Density of Liquids
When 5.0 mL each of vegetable oil, water, and kerosene are put into a large test tube, they form three layers.
a.) Which is the most dense liquid?
● Water
b.) Which is the least dense liquid?
● Kerosene
c.) If an additional 5.0 mL of vegetable oil is added to the test tube, will there be a permanent change in the
order of liquids from bottom to top of the test tube?
● No
d.) Describe the contents of the test tube after the addition of 5.0mL of vegetable oil.
● The order stays the same from top to bottom (kerosense, vegetable oil, water) but the amount of
vegetable oil doubles.
Topics: 1.3.4 Density
Notes: Understanding the density of liquids and how those densities interact with one another.
Exercise 1.3 Physical Properties and Changes
Identify each physical property and physical change in each of the following statements. Also identify the
qualitative and quantitative information given in each statement.
a.) The blue chemical compound azulene melts at 99℃.
● Physical Properties: Blue, melting point of 99℃
● Physical Change: Melting
, ● Qualitative: Blue
● Quantiative: Melting point of 99℃
b.) The white crystals of table salt are cubic.
● Physical Properties: White, Cubic
● Qualitative: White, Cubic
● There is no physical change or quantitative data.
c.) A sample of lead has a mass of 0.123 g and melts at 327℃.
● Physical Properties: Mass of .123g, melting point of 327℃
● Physical Change: Melting
● Quantiative: Mass of .123, melting point of 327℃
● No qualitative data
d.) Ethanol is a colorless liquid that vaporizes easily; it boils at 78℃ and its density is 0.789 g/mol.
● Physical Properties: colorless, liquid, boiling point of 78℃, density of .789 g/mol
● Physical Change: Boiling
● Qualitative: Colorless, Liquid
● Quantiative: boiling point of 78℃, density of .789 g/mol
Topics: 1.3.1 Physical Properties of Matter and 1.3.2 Physical Change
Notes: Understanding qualitative vs quantitative, recognizing physical properties and physical changes
Problem Solving Practice 1.1 Density
Given that there are four quarts in a gallon, 453.59 g in exactly 1 pound, and 946.3 mL in exactly 1 quart,
calculate the mass of one gallon of mercury, hence verifying the statement in the text that a gallon of mercury
weighs more than 100 pounds.
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