exp2_ld - Answer 3. In your own words, describe when and...

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Name Your name Lab Day and Time TA TA's name Room Room C HEMISTRY 11L L EARNING D EVICE EXPT. Scientific Measurement and Error 2 For calculations, you must show all of your work and include appropriate units to receive full credit. Answers to the discussion questions should be in the form of complete sentences. 1. Describe the difference between accuracy and precision. Give examples of measurements that are accurate but not precise, precise but not accurate, and both accurate and precise. (4 pts) Answer 2. Explain the difference between systematic and random error and give examples of both. Describe how systematic and random errors affect the accuracy and precision of measurements. (4 pts)
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Unformatted text preview: Answer 3. In your own words, describe when and how weighing by difference would be employed in the lab. (2 pts) Answer 4. What is the correct volume measurement illustrated in the pictures below? Explain. (4 pts) a. 36 mL c. 36.5 mL b. 36.0 mL d. 36.50 mL a. 12.7 mL c. 13.3 mL b. 12.70 mL d. 13.30 mL Answer Answer 5. The calcium content of a mineral was analyzed five times and the data are presented below. Using the Q test, decide if any piece of data should be omitted. Also calculate the mean and standard deviation for all data determined to be acceptable. (6 pts) Trial 1 2 3 4 5 % Ca 27.1 28.2 27.3 27.1 27.4 Answer A.) B.)...
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This note was uploaded on 06/10/2010 for the course CHEM 101L taught by Professor Austell during the Spring '08 term at UNC.

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