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lab 2 chem 110

# lab 2 chem 110 - Introduction The density of a sample is...

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Introduction : The density of a sample is defined as its mass divided by its volume. In this experiment, the density of two metal pieces was measured by determining its mass and volume two different ways. The mass of the metal pieces was measured using an electronic balance and using the displacement method. The volume of the metal pieces was measured by obtaining measurements with a ruler and using the displacement method. The mass was then divided by the volume to obtain a density measurement in order to figure out what type of metal the pieces were. Data and Observations: Calculations and Results: Graphs are attached. Slope of line for Graph 1- .10 gms/cm³ Slope of line for Graph 2- 4.5 gms/cm³ Slope of line for Graph 3- 1.7 gms/mL Most likely the metal is Zinc. Percent Error Large Measurement: (7.49-7.14) x100% = 4.90% 7.14 Small Measurement: (7.81-7.14) x 100% = 9.38% 7.14 Large Displacement: (8.61-7.14) x 100% = 20.6% 7.14 Large Measurements Small Measurements Large Displacement gms cm³ gms cm³ gms cm³ 28.975 5.832 15.271 3.004 28.975 3.9 15.788 2.040 11.478 1.58 16.035 2.5 29.249 3.730 12.133 1.58 24.249 8.0 21.630 3.100 11.580 1.5 21.630 3.0 22.696 3.200 16.368 2.4

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