Chemistry Solved_Part_6

Chemistry Solved_Part_6 - Week 4 Laboratory Activity 4...

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©2010 Digital Interactive Video Education Week 4 Laboratory Activity 4 Measuring Matter Introduction Laboratory Activity 3 was a “qualitative” experiment. We did not record any measurments, but simply made obser- vations on the degree of magnetism, reactivity, etc. during the experiment. In Laboratory Activity 4, we will conduct a “quantitative” experiment to measure the density of an object. Before we begin, let’s practice using various instru- ments for measuring length, volume, and mass. Refer to the methods section for the required materials. Use the appropriate number of signiFcant digits on all calculations. Measurement tips: -When measuring using instruments with “tick marks” or graduations, always have your eyes perpendicular to the point of measurement, and never at an angle or to one side. -When a measurement is between graduations, you can estimate a place value. ±or example, if graduations were 1 mL apart, you can estimate to 0.1 mL. -When measuring liquid volumes, always make your measurement from the bottom of the meniscus.
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Chemistry Solved_Part_6 - Week 4 Laboratory Activity 4...

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