ChemLab1

ChemLab1 - Uyen Nguyen Precision and Accuracy; Mass and...

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Uyen Nguyen Precision and Accuracy; Mass and Density February 4, 2008 Chem 002, Section 005 Precision and Accuracy; Mass and Density Introduction : In this laboratory experiment, we will be using several different pennies that were produced from different decades to measure their weights, density and volume. The purpose of this experiment is to determine whether there is a consistence, reproducible difference between the masses of U.S. “copper” pennies minted in different year and whether or not this is due to the changes in the composition or dimensions of the penny. Experimental Procedure: 1. Select four pennies minted in four different decades. 2. Use one of the electronic analytical balance and measure each penny three times. 3. Find another electronic analytical balance and measure each penny again three times. 4. For each penny, calculate the average and standard deviation from each balance. Then calculate the total average and standard deviation from each penny from the two balances. 5. Get into a group, and within your group, select one penny from each decade. 6. Using a graduated cylinder, find the volume of each penny selected from each decade. Then, find the density of each penny.
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This note was uploaded on 02/27/2010 for the course CHEM 1132 taught by Professor Cole/clark during the Spring '08 term at UCM.

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ChemLab1 - Uyen Nguyen Precision and Accuracy; Mass and...

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