advertisement

Name_______________________ Unit 2 – Properties of Matter/Density Test Per._______ Date_____________ Answer the questions completely. SHOW ALL MATH WORK and DON’T forget to include the units! 1. What is the mathematical equation for density? 2. If two objects have the same volume, but object A has greater mass than object B, which one will have the greater density? ___________________________________________________________ 3. Imagine that you have a cube of copper and a cube of aluminum, which are exactly the same size and shape. When you place them each on an electronic balance, you find that the copper cube has more mass than the aluminum cube. Give one possible reason why the copper cube has more mass. _________________________________________________________________________________ _________________________________________________________________________________ 4. How can you use the water displacement method to find the volume of an irregular solid? _________________________________________________________________________________ _________________________________________________________________________________ _________________________________________________________________________________ 5. What is the volume of an object that made the water level rise in a graduated cylinder from 50 mL to 59 mL? Remember that volume is measured in cm3 for solid objects & not mL when giving your answer. 6. What is the density of water? 7. Will an object with a density of 0.86 g/cm3 sink or float in water? How do you know? _________________________________________________________________________________ 8. A solid rubber stopper has a mass of 33.0 grams and a volume of 30.0 cm3. What is the density of rubber? 9. A marble statue has a mass of 6,200 grams and a volume of 2,296 cm3. What is the density of marble? 10. What is the mass of a pure platinum disk with a volume of 113 cm3? The density of platinum is 21.4 g/cm3. 11. The density of cork is 0.24 g/cm3. What is the volume of a 240-gram piece of cork? 12. The density of gold is 19.3 g/cm3. What is the volume of a 575-gram bar of pure gold? 13. The density of mercury (a liquid metal) is 13.6 g/mL. What is the volume of a 155-gram sample of mercury? 14. If 89.2 mL of a liquid has a mass of 75.2 g, calculate the liquid’s density. 15. A cube of metal has a mass of 1450 g and displaces 542 mL of water when immersed. Calculate the density of the metal. For numbers 16 – 25 use the chart to answer the questions. Densities of Common Substances @ 20°C Substance Density (g/cm3) 0.00133 Oxygen Hydroge 0.000084 nEthanol 0.785 0.880 Benzene 1.000 Water 1.74 Magnesiu m 2.16 Sodium chlorid e Substance Aluminum Iro n Copp er Silve rLea d Mercury Gol d Density (g/cm3) 2.70 7.87 8.96 10.5 11.34 13.6 19.32 Calculate the volume of 60.0 g of each of the following substances: 16. Sodium chloride (NaCl) 17. Mercury (Hg) 18. Benzene (C6H6) 19. Silver (Ag) 20. Gold (Au) Calculate the mass of 40.0 cm3 of each of the following substances: 21. Iron (Fe) 22. Lead (Pb) 23. Aluminum (Al) 24. Copper (Cu) 25. Magnesium (Mg) Densities of Common Substances @ 20°C Substance Density (g/cm3) 0.00133 Oxygen Hydroge 0.000084 nEthanol 0.785 0.880 Benzene 1.000 Water 1.74 Magnesiu m 2.16 Sodium chlorid e Substance Aluminum Iro n Copp er Silve rLea d Mercury Gol d Density (g/cm3) 2.70 7.87 8.96 10.5 11.34 13.6 19.32 STOP