Concept explainers
A chemist observes the behavior of a gas by filling a balloon and measuring its volume at different temperatures. After making many measurements, he concludes that the volume of a gas always increases with increasing temperature. The chemist's conclusion is best classified as an:
a. observation
b. law
c. theory
Interpretation:
The given statement is to be classified as an observation, a law, or a theory.
Concept introduction:
A law is a rule which is universally followed. A law is something which is undeniable.
A theory is an idea or a framework, which is used to explain some phenomenon.
The process of monitoring a change in something is called an observation.
Answer to Problem 1SC
Correct Answer: Option (b).
Explanation of Solution
Reason for correct option:
The experiment is conducted to check the behavior of a gas by a chemist, in which a balloon is filled with the given gas and the volume of gas is measured at different temperatures. The chemist observed that when there is an increase in the temperature of the gas, the volume of the gas also increases. This signifies a law. It is not a type of a theory or any observation. After many experiments on the behavior of gases, the above statement is proved and becomes a law.
Hence, option (b) is correct.
Reason for incorrect options:
Option (a) is incorrect because according to option (a), it is an observation.
Option (c) is incorrect because according to option (c), it is a theory.
Hence, options (a) and (c) are incorrect.
Want to see more full solutions like this?
Chapter 1 Solutions
Chemistry In Focus
- Using Table 1.5, calculate the volume of 25.0 g of each of the following substances at 1 atm. a. hydrogen gas b. water c. iron Chapter 5 discusses the properties of gases. One property unique to gases is that they contain mostly empty space. Explain using the results of your calculations.arrow_forwardAnswer number 5 to 8 pls. I don't want to waste my money here.arrow_forwardPart II Graham's Law (average speed and molar mass) - Submicroscopic View Your observation 1. The speed of the particles is (circle one) a. Constant b. Variable C. same 2. The particles move in a between collisions. a. straight –line b. curved path 3. The speed of the particles changes following the collision with a. another particle b. the wall of the container c. both the wall of the container and another particle. Use the Track function explained earlier to help answer this question. 4. Collisions between particles or the walls of the container are elastic or not elastic. 5. The particles attractions to other particles. а. еxperience b. do not experience 6. The RMS speed of helium is as the mole of helium changes. a. constant b. variable 7. Record the RMS speeds of different gases in the following table. Table 1. RMS speed of gases Gas Не Ne Ar Molar mass g/mol RMS speed m/s 8. Is your observation of RMS speeds consistent the Graham's law of effusion, which states that rates of…arrow_forward
- gas molecules experience friction when traveling through space A. True B. Falsearrow_forward2. Pressure can be measured in a. grams. b. meters. kilopascals. d. liters. C.arrow_forwardAccording to the kinetic-molecular theory of gases, particles in a gas a. have different shapes b. have different colors c. are in constant motion d. may remain motionless for a period of time at high temperature e. take up a significant amount of volumearrow_forward
- 6. When Mr. Calvo heated up the water, the sugar dissolved Name: Date: Class: Pages: 149 to 157 5. To make a solution, particles from one substance so that you cannot see them. into another substance A. dissolves B. drags C. rubs D. condenses A. slower B. faster C. without any change D. into salt 7. A begins and ends with the same kind of matter. A. chemical change B. physical change D. solute C. solvent 8. A begins with one kind of matter and ends with another. B. chemical change B. physical change C. solvent D. solute . when a substance goes through a chemical change, it forms a new substance that has different physical and chemical properties. Chemical changes are often caused by changes in temperature. Which of the following is an example of a chemical change caused by a change in temperature? А. burning wood in a fire melting ice cream С. В. freezing a popsicle boiling water D. 10.Iron becomes rust when it reacts with oxygen. Which of the following is another example o material…arrow_forwardYou have a sample of a pure substance at a high temperature and high pressure. It has a density similar to its liquid phase, but it has a kinetic energy similar to its gas phase. What state of matter would best describe this substance? a. solid b. liquid c. gas d. supercritical fluidarrow_forwardName the three most common states of matter on Earth. Physical properties can be divided into two categories. _______ depend on the amount of matter present, while _______ don't. Match the following properties with the best descriptions of each. a. Physical change i. Observable without affecting substance's composition b. Chemical change ii. Must undergo a chemical reaction to observe c. Physical property iii. Easily reversible d. Chemical property iv. Can only be reversed by a chemical reaction Give a general formula for each type of reaction.a. Decompositionb. Combinationc. Displacement Repeating many _______ forms a crystal structure. Inside each of these repeated units is the _______. Some phase transitions require an input of heat, such as _______. Other phase transitions require heat to be released, such as _______. What are two characteristics that make an ideal gas distinct from a real gas? At what temperatures do Bose-Einstein condensates (BCEs) form?arrow_forward
- Please helparrow_forward19. Use the kinetic-molecular theory to explain each observation given. a. Wax melts near the flame of a burning candle. b. Liquid water may be converted into ice cubes in a freezer. c. Ginger ale flows to match the shape of a glass. d. Water gradually evaporates from a swimming pool. e. Water vapor condenses inside house windows on cold days. f. Snow gradually disappears, even when the tem- perature remains below freezing. g. Solids and liquids cannot be compressed as much as gases.arrow_forwardAnswer number 21 to 26 pls. I don't want to waste my money here.arrow_forward
- World of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage Learning
- Living By Chemistry: First Edition TextbookChemistryISBN:9781559539418Author:Angelica StacyPublisher:MAC HIGHERChemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage Learning