Concept explainers
Make a drawing, based on the kinetic-molecular theory and the ideas about atoms and molecules presented in this chapter, of the arrangement of particles in each of the cases listed here. For each case, draw 10 particles of each substance. It is acceptable for your diagram to be two dimensional. Represent each atom as a circle, and distinguish each different kind of atom by shading.
(a) a homogeneous mixture of water vapor and helium gas (which consists of helium atoms)
(b) a heterogeneous mixture consisting of liquid water and solid aluminum; show a region of the sample that includes both substances
(c) a sample of brass (which is a homogeneous solid mixture of copper and zinc)
Trending nowThis is a popular solution!
Chapter 1 Solutions
Chemistry & Chemical Reactivity
Additional Science Textbook Solutions
General, Organic, and Biological Chemistry - 4th edition
Basic Chemistry (5th Edition)
Organic Chemistry
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
Chemistry: Structure and Properties
- Table salt from the beaker on the left in the photograph is added to water, forming the solution on the right of the photo. If you want to separate the mixture, would the distillation apparatus in figure 2-16 or the filtration apparatus in figure 2-17 be the better choice? Explain.arrow_forwardSuppose someone emptied ball bearings into a container of salt. Could you separate the ball bearings from the salt? How? Would your method involve no change, be a physical change, or be a chemical change?arrow_forwardClassify the substances represented by the models in Problem 1-58 as to the number of atoms present per molecule, that is, as diatomic, triatomic, tetraatomic, etc.arrow_forward
- You are given a hammer, a battery, a bulb, wires and switch.(a) How could you use them to distinguish between samples of metals and non- metals?(b) Asses the usefulness of these tests in distinguishing between metals and non-metals?arrow_forward(a) The sodium ion did not take part in this chemical reaction(Diluted H2SO4(aq) versus NaOH(aq)). What do we call such an ion?(b) Draw a simple diagram which shows how the sodium ion mixes with water in solution.What do we call this physical process?arrow_forwardYou are given a hammer a battery, a bulb, wires and switch(a) How could you use them to distinguish between samples of metals and non metals?(b) Assess the usefulness of these tests to distinguish between metals and non-metalsarrow_forward
- Classify each change as physical or chemical. (a) the rusting of iron(b) the evaporation of fingernail-polish remover (acetone) from the skin(c) the burning of coal(d) the fading of a carpet upon repeated exposure to sunlightarrow_forwardChemistry (b) A sampling plan is necessary to ensure that a laboratory sample is truly a representative of the entire population. (i) Describe the goals of the sampling plan. "It is possible to determine whether the population is homogeneous or heterogeneous if a single sample is collected and analyzed." Comment on this statement. (ii)arrow_forward7. State whether each of the following represents a chemical change or merely a physical change:(a) A few grams of sucrose (table sugar) are placed in a small beaker of deionized water; the sugar crystals “disappear,” and the liquid in the beaker remains clear and colorless.(b) A copper statue, over time, turns green.(c) When a teaspoon of baking soda (sodium bicarbonate) is placed into a few ounces of vinegar (acetic acid), volumes of bubbles (effervescence) are produced.arrow_forward
- 5 Water is evaporated from the magnesium chloride solution. The resulting solid is melted at 700°C and decomposed by passing electric current through it. (a) What is the name of the physical change that occurs first in the magnesium chloride? (b) Write the balanced chemical equation for this step. (c) Identify the type of chemical reaction.arrow_forward60. When tin comes in contact with the oxygen in the air, tin(IV) oxide, SnO2, is formed. Sn(s) + O2(g) SNO2(s) A piece of tin foil, 8.25 cm × 21.5 cm × 0.600 mm (d = 7.28 g/cm³), is exposed to oxygen. (a) Assuming that all the tin has reacted, what is the mass of the oxidized tin foil? (b) Air is about 21% oxygen by volume (d = 1.309 g/L at 25°C, 1 atm). How many liters of air are required to completely react with the tin foil? |Darrow_forward(d) Complete the following statements: (i) The three are solid, liquid and (ii) The three scales are degree Celsius, Kelvin and (iii) Pure substances have a composition whereas mixtures have a composition. Homogeneous mixtures have a composition. When a solute is in water, the homogeneous mixture formed is called (iv) CoSO4 is whereas CoSO4:7H2O is (v) NaF(s) contains an bond. bond whereas H2(g) contains a (vi) To remove the water molecules from CUSO4 5H2O we heat the sample of this compound with a which has a blue flame and we cool the sample in a which contains silica gel. (vii) The Group 8A (Group 18) elements are collectively known as 3arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemical Principles in the LaboratoryChemistryISBN:9781305264434Author:Emil Slowinski, Wayne C. Wolsey, Robert RossiPublisher:Brooks ColeIntroductory Chemistry: An Active Learning Approa...ChemistryISBN:9781305079250Author:Mark S. Cracolice, Ed PetersPublisher:Cengage Learning
- World of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage LearningGeneral, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage Learning