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1.1 Chemistry in context Read Online
1.2 Phases and classification of matter Read Online
1.3 Physical and chemical properties Read Online
1.5 Measurement uncertainty, accuracy, and precision Read Online
1.6 Mathematical treatment of measurement results Read Online
Your alarm goes off and, after hitting “snooze” once or twice, you pry yourself out of bed. You make a cup of coffee to help you get going, and then you shower, get dressed, eat breakfast, and check your phone for messages. On your way to school, you stop to fill your car’s gas tank, almost making you late for the first day of chemistry class. As you find a seat in the classroom, you read the question projected on the screen: “Welcome to class! Why should we study chemistry?”
Do you have an answer? You may be studying chemistry because it fulfills an academic requirement, but if you consider your daily activities, you might find chemistry interesting for other reasons. Most everything you do and encounter during your day involves chemistry. Making coffee, cooking eggs, and toasting bread involve chemistry. The products you use—like soap and shampoo, the fabrics you wear, the electronics that keep you connected to your world, the gasoline that propels your car—all of these and more involve chemical substances and processes. Whether you are aware or not, chemistry is part of your everyday world. In this course, you will learn many of the essential principles underlying the chemistry of modern-day life.
| Start Quiz | Download PDF | |
| Start Quiz | Download PDF | |
| Start Quiz | Download PDF | |
| Start Quiz | Download PDF | |
| Start Quiz | Download PDF | |
| Start Quiz | Download PDF |
Question: The volume of a certain gas sample is 1150 mL at a temperature of 25°C. At what temperature would that same gas sample have a volume of 1.53 L at constant pressure and mass?
Choices:
-49.1°C
124°C
248°C
397°C
Question: The phase change from solid to gas is called ______________.
Choices:
boiling
efflorescence
evaporation
sublimation
Question: A sample of a certain gas has a volume of 222 mL at 695 mm Hg and 0°C. What would be the volume of this same sample of gas if it were measured at 333 mm Hg and 0°C?
Choices:
894 mL
657 mL
463 mL
359 mL
Question: For a given sample of gas molecules, the average kinetic energy depends only on the value of the ________________.
Choices:
pressure
temperature
volume
moles
Question: The volume of a certain gas sample is 235 mL at a temperature of 25°C. At what temperature would that same gas sample have a volume of 310 mL at constant pressure and mass?
Choices:
-47.0°C
33.1°C
69.4°C
120°C
Question: If the temperature and pressure are kept constant during the process, how many liters of TiCl[sub]4[/sub] gas will be produced when 20.0 L of chlorine react with titanium, according to the reaction: Ti(s) + 2 Cl[sub]2[/sub](g) TiCl[sub]4[/sub](g)?
Choices:
5.00 L
10.0 L
20.0 L
40.0 L
Question: Nitrogen gas has a pressure of 452 mm Hg. What is the pressure in atmospheres?
Choices:
4.52 atm
0.595 atm
0.452 atm
1.68 atm
Question: The liquid to gas phase transition for the drying rainwater on a road, following a rainstorm, is described to be what?
Choices:
Boiling
Evaporation
Sublimation
None of the above
Question: Ionic crystals have the following properties.
Choices:
Long range order
Amorphous
Made up of neutral molecules
None of the above
Question: In a phase diagram, if a sample is at low pressure and high temperature, it is likely to be in what phase?
Choices:
Liquid
Gas
Solid
Both A and C
Question: The atmospheric pressure on a nice day is 751 mm Hg. What is this pressure in atmospheres?
Choices:
0.751 atm
7.51 atm
0.988 atm
1.01 atm
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