Lab 1 - Moles, Mass, and Volume

Prior to class please read lab safety please read the

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Unformatted text preview: the proper containers in the set- up area. Prior to Class Please read Lab Safety. Please read the following sections in Lab Equipment: Analytical Balance and Graduated Cylinder under Volumetric Glassware. Please review the following videos: Safety and Analytical Balance. Lab Procedure Please print the worksheet for this lab. You will need this sheet to record your data. Part A: How Big is a Mole? 1 Obtain a small beaker and a jar of popcorn from the set- up area. If you have a watch with a second hand use it as your timer or use the clock on the wall in the lab. 2 One person should act as the counter, the other as the timer. When the timer signals, the counter should start counting kernels, dropping them into the beaker one at a time. At the end of 30 seconds, stop counting and record the count in Table A. 3 Repeat the experiment three more times, switching jobs as counter and timer for each trial. Record the results in Table A. 4 Calculate the average number of kernels counted in the four trials, and enter the value in Table A. Part B: Molar Mas s es (Counting by Moles ) 1 Determine the mass o...
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