CHEM2: Chemistry in Your World 2nd Edition Test Bank

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Chapter 1—Living in a World of ChemistryMULTIPLE CHOICE1.Which activity comes first in the scientific method?a.conclusionb.hypothesisc.experimentationd.observationANS:D2.Which is considered a physical science?a.physicsb.biologyc.zoologyd.botanyANS:A3.A scientist is trying to make a new insecticide that will be more toxic to flies, but less toxic to humansthan insecticides now available. The scientist is engaged ina.basic research.b.applied research.c.technology.d.serendipity.ANS:B4.Which technology described in this chapter required the most time from idea to use?a.photographyb.nylonc.roll-on deodorantd.X-rays in medicineANS:D5.The discovery of Teflon® wasa.anexample of planned research.b.accidentalc.eventually damaging to the ozone layer.d.deemed useless by the discoverer's company.ANS:B6.Which of the following are linked to the release of CFCs?a."ozone holes" in thestratosphereb.increased air pollutionc.drinking water pollutiond.increased food spoilageANS:A

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CHEM2Chapter 1Living in a World ofChemistry27.An endeavor to provide an "ample margin of safety" to protect the public is an example of aa.technology-based law.b.balancing law.c.risk management.d.risk-based laws.ANS:A8.What is the approximate population of the world?a.6,000,000 peopleb.about 3 billion peoplec.over 6,000,000,000 peopled.2,000,000 peopleANS:C9.Chemistry is often defined as thestudy ofa.matter and the changes it can undergo.b.naturally occurring matter.c.fundamental particles in research labs.d.synthetically produced matter.ANS:A10.Refrigeration has been used since the late 1800s and earlyrefrigerants werea.safe.b.flammable and toxic.c.inert.d.fluorine compounds, CFCs.ANS:B11.The map of the complete human DNA sequence wasa.completed in 1990.b.doneexclusively in not-for-profit research labs.c.completed exclusively in for-profit research labs.d.completed in 2003.ANS:D12.Which of the following explorations could be enhanced by our knowledge of DNA?a.development of drug to curecancerb.use of genetically modified food to produce edible vaccinesc.determine if a convicted felon is actually innocentd.all of theseANS:D

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CHEM2Chapter 1Living in a World ofChemistry313.Which is considered a fossil fuel?a.coalb.solarc.windd.hydrothermalANS:A14.The smallest concentration listed below isa.parts per million.b.parts per trillion.c.parts per billion.d.parts per thousand.ANS:B15.What is chemophobia?a.fear of chemistry coursesb.fear of global warmingc.fear ofchemicalsd.fear of radiationANS:CTRUE/FALSEAnswer the following in reference to the 2003 HCRA publicationRisk in Perception.1.Natural risks seem less worrisome than human-made risks.ANS:T2.The American perception of“It can’t happen to me.” or “It can’t happen here.” changed in 2001.ANS:T3.The perception of the severity of a risk escalates with time.ANS:F

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CHEM2Chapter 1Living in a World ofChemistry4MATCHINGUse the following terms to answer the questions given below.a.basic researchb.applied researchc.natural scienced.social sciencee.technology1.What is the term applied to scientific research that is oriented toward an immediate, practical goal?2.What is the term applied to scientific research that has noimmediate, practical goal?3.What term would be applied to expanding the number of methods to produce marketable medicinesbased on DNA manipulation?1.ANS:B2.ANS:A3.ANS:E

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Chapter 2—The Chemical View of MatterMULTIPLE CHOICE1.Which of the following is not one of the common states of matter?a.solidb.plasmac.liquidd.gasANS:B2.Which of the following is one of the classes of pure substances?a.compoundb.homogeneous mixturec.solutiond.heterogeneous mixtureANS:A3.Which is not a mixture?a.pure waterb.mayonnaisec.strawberry Kool-Aid®drinkd.rockANS:A4.Most samples of matter occur in nature asa.elements.b.compounds.c.homogeneoussamples.d.mixtures.ANS:D5.Separating a mixture of iron and sulfur can be donea.by filtration.b.dissolving in water.c.with a magnet.d.by burning.ANS:C6.Which statement describes a physical property of oxygen?a.Oxygen supports burning of gasoline.b.Oxygen has a density of 0.0014 g/mL.c.Oxygen is required for human metabolism of food.d.Oxygen combines with iron causing the formation of rust.ANS:B7.Which is a chemical property?a.boilingpointb.state

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CHEM2Chapter 2The Chemical View of Our World2c.odord.flammabilityANS:D8.A process is probably a chemical reaction ifa.it produces light.b.a solid appears when two solutions are mixed.c.bubbles start to form when two substances are mixed.d.all of theseANS:D9.Which of the following is not a chemical change?a.burning charcoalb.rusting ironc.melting iced.baking breadANS:C10.Which term describes energy?a.motionb.heatc.lightd.all of theseANS:D11.Alfred Nobel____________?a.discovered dynamiteb.proposed the metric systemc.developed the STM, scanning tunneling microscoped.discovered kinetic energyANS:A12.Which mixture is heterogeneous?a.salt and waterb.water and oilc.sweetened hot tead.Ivory soap barANS:B13.The element whose name is derived from the Latinaurum, meaning shining dawna.gold.b.aluminum.c.silver.d.chromium.ANS:A

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CHEM2Chapter 2The Chemical View of Our World314.Which of the following elements is a metal?a.Ca,calciumb.Na, sodiumc.Hg, mercuryd.all of theseANS:D15.Sublimation is a characteristic physical property ofa.chlorine (Cl2, liquid).b.oxygen (O2, gas).c.bromine (Br2, liquid).d.iodine (I2, solid).ANS:D16.Whatinformation is not provided by the formula, C4H10, for butane?a.butane being an organic compoundb.the molecular formulac.the relative number of atoms of each kindd.the shape of the moleculeANS:D17.Which of the following sets, is alist of the symbols for an element and a compound (in that order)?a.Mg, COb.CO, CO2c.CO, Cod.H2O2, PANS:A18.Which of the following sets, is a list of the symbols that could represent the following substances,respectively?leada compound of equal parts hydrogen and oxygenelemental oxygena.PB, H2O2, Ob.Pb, HO, Oc.Pb, H2O2, O2d.PB, HO, O2ANS:C19.In the balanced equation, 2 Al + 6 HCl→2 AlCl3+ 3 H2, the sum of the coefficients of thereactants isa.5.b.8.c.13.d.none of theseANS:B

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CHEM2Chapter 2The Chemical View of Our World420.The equation, 2 C(s) + O2(g)→2 CO(g), tells usa.the number of atoms of each kind in reactants and products is the same.b.carbon monoxide (CO) is a product.c.two atoms ofcarbon undergo reaction.d.all of theseANS:D21.How does the known number of nonmetals compare to that of metals?a.There are fewer metals.b.There are an equal number of each.c.There are fewer nonmetals.d.This cannot bepredicted because not all metals and nonmetals have been discovered.ANS:C22.What prefix is the largest?a.megab.centic.microd.kiloANS:A23.A person weighs 165 lbs. Which of the following would calculate their mass inkilograms if 2.2 lbs = 1kg?a.1652.2b.165 ÷ 2.2c.2.2 ÷ 165d.165 + 2.2ANS:B24.The quantity 10-9(one billionth) is designated by the prefixa.pico.b.nano.c.centi.d.mega.ANS:B25.Which of the following wouldconvert 15 L of gasoline to gallons? (1.06 qt = 1 L ; 4 qts = 1 gal)a.(15) (1.06/1) (1/4)b.(15) (1/1.06) (4/1)c.(15) (1.06/1) (4/1)d.(15) (1/1.06) (1/4)ANS:A

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CHEM2Chapter 2The Chemical View of Our World526.An example of a homogeneous mixture isa.oil in water.b.a saltwater solution.c.a suspension.d.a pure substance.ANS:B27.Which of the following is not a pure substance?a.pure goldb.clean airc.refined sugard.distilled waterANS:B28.Which state of matter is composed of chargedparticles which are dramatically affected by electric andmagnetic fields?a.solidsb.liquidsc.gasesd.plasmasANS:D29.How many categories of pure substances exist?a.2b.3c.thousandsd.about 100ANS:A30.A puresubstance which can be decomposed into two or more pure substances is a(n)a.element.b.compound.c.mixture.d.colloid.ANS:B31.For which of the following is it necessary that there be a definite composition which cannot vary?a.mixtureb.solutionc.compoundd.colloidANS:C

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CHEM2Chapter 2The Chemical View of Our World632.How many phosphorus atoms are in the formula H3PO4?a.4b.3c.7d.1ANS:D33.How many chemical formulas are in this chemical equation?P4(s) + 6 F2(g)→4 PF3(g)a.2b.3c.4d.11ANS:B34.Which of the following is an SI unit of ?a.poundb.kilogramc.quartd.calorieANS:B35.Potential energy is defined asa.heat energy.b.energy associated with motion.c.stored energy.d.the ability to dowork.ANS:C36.Which of the following is a physical change?a.souring of milkb.ripening of fruitc.frying an eggd.meltingANS:D37.The simplest form of matter is a(n)a.element.b.mixture.c.compound.d.solution.ANS:A

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CHEM2Chapter 2The Chemical View of Our World738.Which of the following is a compound?a.mercuryb.bloodc.sugard.airANS:C39.How would you separate a mixture of salt, sand, and water?a.by filtration, followed by evaporationb.freezing, followed by meltingc.separating with tweezers, followed by evaporationd.by filtration, followed by burningANS:A40.Which of the following is a physical property?a.freezing pointb.colorc.odord.all of the aboveANS:D41.Which of thefollowing is an example of a chemical change?a.boiling waterb.iodine sublimatingc.barbecuing a steakd.breaking a piece of glassANS:C42.Identify the nonmetal among those listed below.a.Feb.Nac.Sd.AgANS:C43.What isthe coefficient in front of iron when the following equation is balanced?Fe + O2→Fe2O3a.1b.2c.4d.6ANS:C

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CHEM2Chapter 2The Chemical View of Our World844.How many millimeters are in 100 cm?a.10b.1000c.100d.1ANS:B45.Which of the following has thehighest kinetic energy?a.boulder on the top of hillb.water behind a damc.a ball falling from a 3 story buildingd.a piece of woodANS:C46.What kind of change is depicted in the following image?a.chemical changeb.physical changec.both a chemical change and a physical changed.There is no change shown in the image.ANS:ATRUE/FALSE1.A pure substance which can be decomposed intotwo or more pure substances is called a mixture.ANS:F2.10 mg is larger than 100 ng.ANS:T3.Glucose has the chemical formula C6H12O6. In one molecule of glucose there are 24 atoms.ANS:T4.The density of copper is 8.96 g/mL andthat of gold is 19.3 g/mL.The ratio of the mass of a 10 mLblock of copper to a 10 mL block of gold is 0.464.ANS:T

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CHEM2Chapter 2The Chemical View of Our World95.The most common unit of volume used in chemistry is the millimeter.ANS:F6.In order to convert a measurement for theelement mercury from mass to volume, one would multiplythe starting measurement by the following factor.ANS:FCOMPLETION1.The chemical symbol for copper is_________.ANS:Cu2.Mg is the chemical symbol for____________________.ANS:magnesium3.There are ____________mg in exactly 10. g.ANS:10,000100001044.The SI multiple of 10–3is indicated in a unit with the common prefix _________.ANS:milli5.1 Mm = _______mANS:1061,000,0001000000

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CHEM2Chapter 2The Chemical View of Our World10MATCHINGUse the pictures below to answer the following questions.a.c.b.d.1.Which figure abovedepicts a homogeneous mixture?2.Which figure above depicts a heterogeneous mixture?3.Which figure above depicts a compound?4.Which figure above depicts an element?1.ANS:C2.ANS:B3.ANS:D4.ANS:A

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Chapter 3—Atoms and the Periodic TableMULTIPLE CHOICE1.Which combination of individual and contribution isnotcorrect?a.Antoine Lavoisier-clarified confusion over cause of burningb.John Dalton-proposed atomic theoryc.Marie Curie-discovered radium andpoloniumd.Robert Millikan-discovered the neutronANS:D2.John Dalton did his research work in which of the following countries?a.Franceb.Greecec.Russiad.EnglandANS:D3.Which radiation type has no detectable charge?a.alphab.betac.gammad.both alpha and betaANS:C4.Which radiation type was shown to be identical to N electron?a.alphab.betac.gammad.None are identical to an electron.ANS:B5.Rutherford's foil experiment providedevidence for what atomic feature?a.nucleusb.electronc.protond.neutronANS:A6.Which subatomic particle has the incorrect charge indicated?a.proton-positiveb.electron-negativec.neutron-neutrald.nucleus-neutralANS:D

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