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GRADE: 82.5/90 Experiment 1 Fundamentals of Chemistry, Precision, and Accuracy Mary Johnson Vikram Balaji 23 January, 2018 CHEM 1310 Section C-27 TA: Shaoren Yuan Honor Pledge – Freshman Chemistry Laboratories I did not copy any portion of this work from the work of other students, old lab reports, or unreferenced materials. I understand that such activity is a violation of the Georgia Tech Honor Code. ______________________________________ Signature
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CHEM 1310 Laboratory Data and Results: A. Measurements, Units, and Significant Digits Table 1. Measurements of Lab Drawer Length Width Depth cm 44.89 39.23 19.24 dm 4.489 3.923 1.924 Measuring device meter stick Smallest graduation 0.1 cm Volume of drawer (cm 3 ) 33970 Volume of drawer (L) 33.97 Table 2. LabQuest Measurements of Room Temperature Trial Room temperatur e (ºC) 1 23.5 2 23.0 3 22.7 4 22.4 5 22.2 Mean 22.8 B. Accuracy and Precision Table 3. Accuracy and Precision of Room Temperature Data St. dev. 0.4605 % error 4.404 Section's mean room temperature (ºC) 21.8 Section's standard deviation (ºC) 1.3
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Table 4. Measuring Liquids with Pipets and Graduated Cylinder Masses of water delivered (g) Instrument Trial 1 Trial 2 Trial 3 Mean St. dev. Serological pipet 9.758 9.737 9.806 9.767 0.02890 Volumetric pipet 9.894 9.896 9.889 9.893 2.944*10 -3 Graduated cylinder 9.843 9.687 9.696 9.743 0.07169 C. Atoms, Isotopes, and Ions Table 5. Counting Elementary Particles in Isotopes and Ions (CHECK LAB MANUAL) Charged Isotopes Charge Protons Neutrons Electrons barium-138 cation +2 56 82 54 chloride-35 anion –1 17 18 18 iodide-127 anion –1 53 74 54 cobalt-39 cation +2 27 32 25 potassium-39 cation +1 19 20 18 sodium-23 cation +1 11 12 10 silver-107 cation +1 47 60 46 iron-56 cation +3 26 30 23 D. The Mole and Avogadro's Number Table 6. Will a mole of gold fit in your lab drawer?
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