# Laboratory Techniques and Measurements Essay

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Pages: 4

Laboratory Techniques and Measurements
Peter Jeschofnig, Ph.D. Version 42-0165-00-01

Lab RepoRt assistant

This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.

Data Table 1: Length measurements. | Object | Length (cm) | Length (mm) | Length (m) | CD or DVD | 12cm | 120mm | .12m | Key | 6.5cm | 65mm | .065m | Spoon
102C-100c x 100%/100C=0.020% 98.2C-100C x 100%/100C= 0.018%

C. An unknown, rectangular substance measures 3.6 cm high, 4.21 cm long, and 1.17 cm wide. If the mass is 21.3 g, what is this substance’s density (in grams per milliliter)?

3.60cm * 4.21cm * 1.17cm = 17.7cc 21.3g/17.7cc = 1.20 g/cc

D. A sample of gold (Au) has a mass of 26.15 g. Given that the theoretical density is 19.30 g/mL, what is the volume of the gold sample?

26.15g / 19.30g/mL = 1.355cc

E. What would happen if you dropped the object into the beaker while using the Archimedes’ Principle method instead of submerging the object?

If you were to drop the object into the beaker while using this principal I am not sure what would happen I think that the results might be ruined due to different objects having different boutancy.

F. How did the magnet’s density measurement using the Archimedes’ Principle compare to the density measurement using the calculated volume? Which method might be more accurate? Why?

When using the Archimedes’ Principal I got a density of 5.33g/cm^3 while using the calculated volume I got a density of 7.04g/cm^3 I would assume that the calculated volume measurement was more accurate due to having less calculated variables like reading the beaker properly.

G. You are given a small piece of gold colored material and want to determine if it is actually gold. Using the