1 Chemistry: An Introduction 2 Measurements And Calculations 3 Matter 4 Chemical Foundations: Elements, Atoms, And Ions 5 Nomenclature 6 Chemical Reactions: An Introduction 7 Reactions In Aqueous Solutions 8 Chemical Composition 9 Chemical Quantities 10 Energy 11 Modern Atomic Theory 12 Chemical Bonding 13 Gases 14 Liquids And Solids 15 Solutions 16 Acids And Bases 17 Equilibrium 18 Oxidation–reduction Reactions And Electrochemistry 19 Radioactivity And Nuclear Energy 20 Organic Chemistry 21 Biochemistry expand_more
3.1 Matter 3.2 Physical And Chemical Properties And Changes 3.3 Elements And Compounds 3.4 Mixtures And Pure Substances 3.5 Separation Of Mixtures Chapter Questions expand_more
Problem 1ALQ: When water boils, you can see bubbles rising to the surface of the water. Of what arc these bubbles... Problem 2ALQ: If you place a glass rod over a burning candle, the glass turns black. What is happening to each of... Problem 3ALQ: The boiling of water is a physical change because the water disappears. physical change because the... Problem 4ALQ: Is there a difference between a homogeneous mixture of hydrogen and oxygen in a 2:1 ratio and a... Problem 5ALQ: Sketch a magnified view (showing atoms and/or molecules) of each of the following, and explain why... Problem 6ALQ: Are all physical changes accompanied by chemical changes? Are all chemical changes accompanied by... Problem 7ALQ: Why would a chemist find fault with the phrase “pure orange juice”? Problem 8ALQ: Are separations of mixtures physical or chemical changes? Explain. Problem 9ALQ: Explain the termselement, afoul, and compound. Provide an example and microscopic drawing of each. Problem 10ALQ: Mixtures can be classified as either homogeneous or heterogeneous. Compounds cannot be classified in... Problem 11ALQ Problem 12ALQ: Look at Table 2.8 in your text. How do the densities of gases, liquids, and solids compare with one... Problem 13ALQ: Label of the following as an atomic element, a molecular element, or a compound. Problem 14ALQ: Match each description below with the following microscopic pictures. More than one picture may fit... Problem 1QAP Problem 2QAP: What is the chief factor that determines thephysical slateof a sample of matter? Problem 3QAP: Of the three stales of matter, and are not very compressible. Problem 4QAP: has a definite volume hut takes the shape of its container. Problem 5QAP: Compare and contrast the ease with which molecules are able to move relative to each other in the... Problem 6QAP: Matter in the __________ state has no shape and fills completely whatever container holds it. Problem 7QAP: What similarities are there between the solid and liquid states of matter? What differences are... Problem 8QAP: A sample of matter that is “rigid” has (stronger/weaker) forces among the particles in the sample... Problem 9QAP: Consider three 10-g samples of water: one as ice, one as liquid, and one as vapor. How do the... Problem 10QAP: ¡n a sample of a gaseous substance, more than 99% of the overall volume of the sample is empty... Problem 11QAP: Elemental bromine is a dense, dark-red, pungent-smelling liquid. Are these characteristics of... Problem 12QAP: Is the process represented below a physical or chemical change? (For Exercises 1314) Magnesium metal... Problem 13QAP: From the information given above, indicate onechemicalproperty of magnesium metal. Problem 14QAP Problem 15QAP: You want to cook some raw noodles to make a pasta dish for supper. So, you turn on the gas stovetop... Problem 16QAP: Which of the following is/are examples of a chemical change? carving Wood snow melting dry ice... Problem 17QAP: Classify each of the following as a physical or chemical change or property. Oven cleaners contain... Problem 18QAP: Classify each of the following as aphysical or chemicalchange or property. A fireplace poker glows... Problem 19QAP Problem 20QAP: What is acompound? What are compounds composed of? What is true about the composition of a compound,... Problem 21QAP: Certain elements have special affinities for other elements. This causes them to bind together in... Problem 22QAP: _________ can he broken down into the component elements by chemical changes. Problem 23QAP: The composition of a given pure compound is always no matter what the source of the compound. Problem 24QAP: Which of the following are considered compounds (as opposed to elements)? He F2 HCI S8 Problem 25QAP: If iron filings are placed with excess powdered sulfur in a beaker, the iron filings are still... Problem 26QAP: If the combination of iron filings and sulfur in Question 25 is heated strongly, the iron reacts... Problem 27QAP Problem 28QAP: Which of the following substances is(are) homogeneous mixture(s)? chocolate chip cookie iodine... Problem 29QAP: Classify the following asmixturesorpure substances. the vegetable soup you had for lunch the... Problem 30QAP: Classify the following asmixturesorpure substances. a multivitamin tablet the blue liquid in your... Problem 31QAP: Classify the following mixtures asheterogeneousorhomogeneous. soil mayonnaise Italian salad dressing... Problem 32QAP: Read the “Chemistry in Focus” segmentConcrete—An Ancient Material Made Newand classify concrete as... Problem 33QAP Problem 34QAP: Describe how the process offiltrationcould be used to separate a mixture into its components. Give... Problem 35QAP: In a common laboratory experiment in general chemistry, students are asked to determine the relative... Problem 36QAP: During a filtration or distillation experiment, we separate a mixture into its individual... Problem 37AP Problem 38AP: Classify each of the following as a(n) element, compound, pure substance, homogeneous mixture,... Problem 39AP: 1f a piece of hard, white blackboard chalk is heated strongly in a flame, the mass of the piece of... Problem 40AP: During a very cold winter, the temperature may remain below freezing for extended periods. However,... Problem 41AP Problem 42AP: True or false? Salad dressing (such as oil and vinegar dressing) separating into layers after... Problem 43AP Problem 44AP: Which of (he following are true? P4 is considered a compound. Metal rusting on a car is a chemical... Problem 45AP: (For Exercises 4546) Solutions containing nickel(II) ion are usually bright green in color. When... Problem 46AP: (For Exercises 4546) Solutions containing nickel(II) ion are usually bright green in color. When... Problem 47AP: The processes of melting and evaporation involve changes in the of a substance. Problem 48AP: A(n) always has the same composition. Problem 49AP: Classify each of the following as aphysicalorchemicalchange or property. Milk curdles if a few drops... Problem 50AP: Which of the following contains an element, a compound, and a mixture? copper, silicon dioxide(SiO2)... Problem 51AP: Classify the following mixtures ashomogeneousorheterogeneous. potting soil white wine your sock... Problem 52AP: Which of the following best describes the air around you on a typical day? (Assume the air is made... Problem 53AP: Give three examples each ofheterogeneousmixtures andhomogeneousflux lures. Problem 54AP: True or false? Mixtures always result in a chemical reaction because they consist of two or more... Problem 55AP: Choose an element or compound with which you are familiar in everyday life. Give... Problem 56AP Problem 57AP: Give an example of each of the following: a heterogeneous mixture a homogeneous mixture an element a... Problem 58AP Problem 59AP: Sketch the apparatus commonly used for simple distillation in the laboratory, identifying each... Problem 60AP Problem 61AP: Which of the following best describes the substanceXeF4 ? element compound heterogeneous mixture... Problem 62CP Problem 63CP: Which of the following describes a chemical property? The density of iron is 7.87 g/cm3. A platinum... Problem 64CP Problem 1CR Problem 2CR Problem 3CR: You have learned the basic way in which scientists analyze problems, propose models to explain the... Problem 4CR: Many college students would not choose to take a chemistry course if it were not required for their... Problem 5CR Problem 6CR Problem 7CR Problem 8CR Problem 9CR Problem 10CR: What ismatter? What is matter composed of? What are some of the different types of matter? How do... Problem 11CR Problem 12CR Problem 13CR Problem 14CR Problem 15CR Problem 16CR Problem 17CR Problem 18CR: a. Given that 1100. mL of ethyl alcohol weighs 78.5 g, calculate the density of ethyl alcohol. b.... Problem 19CR: Which of the following represent physical properties or changes, and which represent chemical... format_list_bulleted