Figure 1 B FIGURE 1 A B CP Chemistry Unit 1 Worksheet 3
NameDatePdCP Chemistry – Unit 1 Worksheet 3Mass, Volume, and Density1. Study the matter shown in Figure 1. Each dotrepresents a particle of matter. [Assume theparticles are uniformly distributed throughouteach object, and particles of the same size have thesame mass.]FIGUREFigure1 1ABBAa. In the table below, show how the masses,volumes, and densities of A and B compare byadding the symbol , , or to the statementin the second column.b. Explain your reasoning for each answer in thelast column.PropertyRelationshipMassA BVolumeA BDensityA B2. Study the matter in Figure 2. [Assumethe particles are uniformly distributedthroughout each object, and particles ofthe same size have the same mass.]a. In the table below show how themasses, volumes, and densitiescompare by adding the symbol , , or to the statement in the secondcolumn.b. Explain your reasoning for eachanswer in the last column.PropertyRelationshipMassA BReasoningFIGURE 2ABCReasoningA CVolumeA BA CDensityA BA CModeling Chemistry1U1 cp ws3 v2.0
3. Is object E or object F more dense? [Assume theparticles are uniformly distributed throughouteach object, and particles with a larger size havea larger mass.] Explain your reasoning.FIGURE 3EF4. In Figure 4 below, a graph shows the relationship between mass and volume for twosubstances, A and B. Use the graph to answer questions about these two substances.FIGURE 4: Mass andVolume RelationshipsTwo Pan Balance8070ASubs tance ABMass (g)605040a) You have built a simple two-panbalance shown above to compare themasses of substances A and B. Whatwould happen to the balance if you putequal masses of A and B in the twopans? Equal volumes of A and B inthe two pans? Explain your reasoning.3020Subs tance B100 10 20 30 40 50 60 70 80volume (mL)b) Find the slope of the line for both A and B using correct units. State the physical meaning of the slope foreach substance.c) If you put 10.0 mL of A in one balance pan, how much mass of B would you need in theother pan to make it balance? Explain your reasoning.d) If you put 35.0 mL of B in one balance pan, what volume of A would you need in theother pan to make it balance? Explain your reasoning.e) Water has a density of 1.00 g/mL. Sketch the line representing water on the graph inFigure 4.Modeling Chemistry2U1 cp ws3 v2.0
f) Determine whether substance A and B will sink or float when placed in a bucket of water.A: sinkfloatB: sinkfloat(circle correct response)Defend your answer using the m-V graph, and your outstanding understanding of density.SubstanceRefer to the table of densities at the right toanswer the following .878.908.9610.5011.3513.5519.305. Sketch a graph of mass vs volume fortitanium, copper and mercury.6. You made some cubes out of each metal in the table that each measures 2.00 cm on everyside. (all except mercury – why can’t you make a cube of mercury?)a. What is the volume of each cube in cm3? in mL? (Show your thinking)V cm3V mLb. Find the mass of these metal cubes:lead cubenickel cubezinc cubeModeling Chemistry(Show your work below)3U1 cp ws3 v2.0
7. Alicia’s cheapskate boyfriend gave her a ring he claims is 24 carat gold. Alicia is skeptical.After chem class the next day she measures the mass of the ring, finds the volume of thering by water displacement, and then calculates the density of the ring. Should shetreasure the ring as his first truly generous gift to her, or throw it at him the next time hewalks by? Defend your answer.DATA:Mass:15.28 gFinal volume:43.7 mLInitial volume:42.2 mLVolume of ring:Density:8. A student filled a graduated cylinder with water and read the meniscus at 25.8 mL. The studentthen dropped a solid material into the graduated cylinder and the water level rose to 35.9 mL. Ifthe solid material had a density of 2.99 g/mL, determine the mass of the solid object.Modeling Chemistry4U1 cp ws3 v2.0
EXTRA CREDITRefer to the table of densities on page 3 of this worksheet to answer these questions:You have some iron wire, copper wire, and titanium wire (all the same gauge, or diameter).Your lab group measured out a length of wire that is exactly 10.00g for each type of metalwire.a) Which of these 3 metal wires would be the longest?b) Which of these 3 metal wires would be the shortest?c) Explain your reasoning for answers a) and b).d) If every 1.0 cm length of the titanium wire has a mass of 0.15 g, how long would the10.00g wire be? (Hint: write a conversion ratio for the two quantities you are workingwith)e) What is the diameter of the titanium wire? (Hint: diameter is related to volume;assume it is a cylinder – Geometry! Oh, yeah!)Modeling Chemistry5U1 cp ws3 v2.0
Answers: #4 to end (quantitative problems, primarily)4a) Balance would tip to the right: mA mB for the same volumeb) DA 60g/45mL 1.3g/mL; DB 32g/60mL 0.53g/mLEach mL of substance has a mass of (1.3 or 0.53) grams.c) mA mB when it is balanced. mA 1.3 g/mL * 10.0 mL 13 g A mB 13 gd) 35 mL B * 0.53g/mL 18.6 g B 18.6 g A18.6g A *1mL/1.3 g 14.3 mL Ae) (sketch line on graph w/slope of 1.0g/1mL)f) A will sink, (dA dwater); B will float, (dB dwater)5. Copper; Mercury; Titanium6 a) volume 2.0 cm * 2.0 cm * 2.0 cm 2.03 cm3 8.0 cm3 8.0 mLb) Volume *8.0 mL***Density mass11.35 g/mL 90.8 g Pb8.90 g/mL 70.2 g Ni7.13 g/mL 57.0 g Zn7) Density of ring 15.28g 10.2 g/mL; Looks like Pb/Cu mix!! Throw it at43.7 mL 42.2mLhim!!Extra Credit:a, c) Longest: Titanium (needs more volume ( length) than the others for 10g mssbecause its density is smallest)b, c) Shortest: Copper (needs less volume ( length) than the others for 10 g massbecause its density is the greatest)d) length 10.0 g *volume 10.0 g *1.0cm 66.7cm0.15g1mL 2.20mL4.54 gv r2lr v2.20cm 0.1025cm *l * 66.67cmd 2r 2 *0.1025cm 0.205cmModeling Chemistry6U1 cp ws3 v2.0
Modeling Chemistry 3 U1 cp ws3 v2.0 f) Determine whether substance A and B will sink or float when placed in a bucket of water. A: sink float B: sink float (circle correct response) Defend your answer using the
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