Running Record

Chapter 2 Review problems 1. Calculate the density of a piece of wood with a mass of 8.3 g and a volume of 5 cm3. 1.7 g/cm3 2. A spoonful of sugar with a mass of 8.8 grams is poured into a 10 mL graduated cylinder. The volume reading is 5.5 mL. What is the density of the sugar? 1.6 g/mL 3. A 10.0 gram pat of butter has a density of 0.862 g/mL. What is the volume of the butter? 11.6 mL 4. A sample of metal has a mass of 34.65 g. When placed in a graduated cylinder containing water, the water level rises 3.3 mL. Which of the following metals is the sample made from? Silver which has a density of 10.5 g/cm3; Tin, which has a density of 7.28 g/cm3; or titanium, which has a density of 4.5 g/cm3. 10.5 g/mL sample is silver 5. Rock salt has a density of 2.18 g/cm3. What would the volume be of a 4.8 g sample of rock salt? 2.2 mL 6. A piece of lead displaces 1.5 mL of water in a graduated cylinder. Lead has a density of 11.34 g/cm3. What is the mass of the lead? 17 grams 7. Convert each temperature reported in degrees Celsius to Kelvin’s. a. 54 °C 327 K b. -54 °C 219 K c. 15 °C 288 K 8. Convert each temperature reported in Kelvin to degrees Celsius a. 32 K -241˚C b. 0 K 273 ˚C c. -281 K -554 ˚C 9. Express the following quantities in scientific notation. a. 50000 m/s2 5.0 x 104 m/s2 b. 0.00000000062 kg 6.2 x 10-10 kg c. 0.000023 s 2.3 x 10-5 s d. 21300000 mL 2.13 x 107 mL e. 990900000 m/s 9.909 x108 m/s f. 7.03 7.03 x 100 10. Solve the following addition and subtraction problems. Write your answers in scientific notation. a. 5.10 X 1020 + 4.11 X 1021 4.62 x 1021 b. 6.20 X 108 - 3.0 X 106 6.2 x 108 c. 2.303 X 105 - 2.30 X 103 2.28 x 105 d. 1.20 X 10-4