Chem 152L Final Review Fa10

Chem 152L Final Review Fa10 - Final Exam Review...

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Brinton, MC Chem 152L Final Exam Review Instructions: Use dimensional analysis wherever appropriate! Include all units in your set-up and answer, pay attention to significant figures, and show your work! No work = no credit!! 1. What is the metric system base unit of each for the following types of measurements? length volume mass temperature 2. The metric system uses prefixes to indicate powers of ten relative to a base unit. Using prefixes, give the metric unit corresponding to each of the following powers of 10. 10 9 meters = 1 10 -1 meter = 1 10 6 meters = 1 10 -2 meter = 1 3. Describe the procedure for lighting a Bunsen burner safely using a match. 4. Describe how you should be dressed, from head to feet, when performing lab experiments.
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Brinton, MC Chem 152L 5. A rectangular solid has a mass of 110.786 g and has the following dimensions: 3.63 cm by 5.48 cm by 4.19 cm. Calculate the density of the solid. 6. Explain how weighing by difference can be used to find the mass of a particular volume of liquid. 7. State the physical quantity (e.g., length, mass, etc.) expressed by the following units. 8. State the significant figures in each of the following measurements. 9. Perform the following calculations, rounding off the answer to the correct number of significant figures. Include units. a) mg b) km c) cm 3 a) 0.002 L b) 89,190 mm c) 1.00 g 5.639 g a) 95.6 s + 8.73 s b) 1.6 cm 3 × 2.27 cm 3 =
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Brinton, MC Chem 152L 10. Define the difference between a physical change and a chemical change . Give one example of each. 11. State four experimental observations providing evidence that a chemical change has taken place. 12. Sketch a picture of a beaker containing mercury (d = 13.6 g/mL), water (d = 1.00 g/mL), dichloromethane (d = 1.33 g/mL), and a chunk of solid iron metal (d = 7.88 g/mL). Clearly label each substance.
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13. You are trying to determine the density of an unknown liquid. First you weigh the graduated cylinder and find that its mass is 49.6623 g. Then you pour some liquid into the graduated cylinder and weigh it again, finding the new mass to be 123.1447 g. Measure the volume in the picture below (shown in mL) to the correct number of significant figures, and then calculate the density of the liquid. 14. Indicate whether each of the following processes is exothermic or endothermic : Water condenses on the surface of a cold glass. Snow melts in the spring. Gasoline undergoes combustion. 15. Indicate whether each of the following changes is physical or chemical : Sodium metal melts at 98ºC. Bread bakes at 350ºF. Gray iodine crystals sublime to form purple vapor. 16. Indicate whether each of the following properties is physical or chemical : Copper metal corrodes. Iron metal conducts electricity.
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Chem 152L Final Review Fa10 - Final Exam Review...

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