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Calculating Density Worksheet Name ____________________ Class Period _____ Use the equations on the board to complete this worksheet. 1. What does density mean? (How would you explain it to someone who doesn’t know what it means so that they would understand?) ________________________________________________________________________ ________________________________________________________________________ 2. Why is it said that density is a property of matter? What does that mean? (Think back to yesterday and the chart with the specific density of various items like marble, gold and platinum.) ________________________________________________________________________ ________________________________________________________________________ 3. How is density calculated? Write out the basic equation. __________________________________________________ 4. How is mass found if density and volume are given? _________________________________________________ 5. How is volume found if mass and density are given? ________________________________________________ 6. Why is understanding density important? How does it apply to everyday life? (Think about how it might be important to know if something will sink or float.) ________________________________________________________________________ ________________________________________________________________________ 7. What is the unit for solid density? g/____ 8. What is the unit for fluid density? g/____ 9. A rock with a mass of 32 g and 43 cm3 has the density of ________________? (Don’t forget to include units) Will this rock float or sink in water? ______________ 10.A block measures 6cm by 3cm by 11cm. What is its volume? ________________ If it has a mass of 32 g what is its density? _________________ 11.If you find a random pure metal item outside, what’s one property of matter that you might use to identify it? _______________________________________________________ 12.If a piece of wood has a mass of 32g and measures 28 cm3 what is its density? (Don’t forget proper units)____________________________ 13.If you know the mass and density what can you calculate about a substance? _________________ 14.If you find a gold colored ring and its density is 19.32g/cm3 and its mass is 46g what is its volume? (Don’t forget units)___________________________________ 15.If the mass of an unknown liquid is 95 g and its volume is 950 mL, what is the density? (Don’t forget proper units) ______________________________ 16.If an unknown irregular solid has a mass of 64 g and when placed in a graduated cylinder with water, the water moves from 42 mL to 73 mL, what is the volume and density of the irregular solid? (Remember volume for solids is measured in cm3 even if the volume is found by water displacement). Volume _________ Density _________ 17.If an unknown liquid has a mass of 54g and a volume of 32 mL, what is the density? ______________ (Use proper units) 18.If the density of a substance is 3.24 g/cm3 is that substance more likely to be a solid or a fluid? (Hint: look at the unit for density. Is that unit for a fluid or a solid?) __________________ 19.If someone asked you how to calculate density what would you tell them they need to know before they could do that? ____________________________________________ 20.My friend has a block of an unknown solid on her desk. It’s a perfect cube, what tool will she use to find its volume? _____________________ What will the unit for volume be in this case? __________________________ 21.What is the mass of ethanol (a liquid) that fills a 200 mL container exactly and has a density of .789 g/mL? ___________________________ 22.A rectangular block of copper metal weighs 1896 g. The dimensions of the block are 8.4 cm by 5.5 cm by 4.6 cm. From this data, what is the density of copper? (hint: find the volume of the block first and don’t forget units) __________________________________ 23.What volume of silver metal will have the mass of exactly 2500.0 g? The density of silver is 10.5 g/cm3 ________________________________________________________ 24.Find the mass of 250.0 mL of benzene (said ben-zeen). The density of benzene is 0.8765 g/mL. (Don’t forget proper units) __________________________ 25.A loaf of bread has a volume of 2270 cm3 and a mass of 454 g. What is the density of the bread? (Don’t forget proper units, I won’t remind you again). _____________________________ 26.A block of wood has a density of 0.6 g/cm3 and a volume of 1.2 cm3, what is the mass of the block of wood? _____________________________________ 27.Use the data given below to calculate the density of each unknown substance. Then use the density chart given to determine the identity of each substance. Mass (g) 4725 171 148 475 680 Volume (cm3) 350 15 40 250 1000 Substance Name Gold Mercury Lead Iron Aluminum Bone Gasoline Air (Dry) Density (g/cm3) #28. ____________ #29. ____________ #30. ____________ #31. ____________ #32. ____________ Substance name _____________________________ _____________________________ _____________________________ _____________________________ _____________________________ Density in g/cm3 19.3 13.5 11.4 7.87 3.7 1.7-2.0 0.66-0.69 0.00119