! ! ! O-H-O H2O MW: 18.01 g/mol BP: 99.98oC 2-methyl-2-propanol tert-butanol (unknown) C4H10O MW: 74.12 g/mol BP: 82.2oC Data: Simple Distillation of 95% EtOH (mL) (DM) First Drop 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Temperature (C) 77 79 80 81 81 81 81 81 81 82 82.5 83 85 87 90 92 95 96 98 100 100 100 Fractional Distillation of 95% EtOH (mL) (Partner) Temperature (C) First Drop 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 72 75 77 78 78 78 78.5 79 80 81 82 82 82 82 82 90 16 17 18 19 20 21 22 23 Fraction Distillation of Unknown A (mL) (DM) Temperature (C) First Drop 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 95 97 98 99 100 100 100 100 53 59 60 60 61 62 62 62 62 63 64 64 64 64 64 64 65 65 66 66 67 68 68 68 69 69 70 70 71 72 73 74 74 75 77 35 36 37 38 39 40 41 42 43 44 45 78 79 79 79 80 81 81 81 81 81 78 Unknown A with a Boiling Point of ~81 degrees Celsius is 2-methyl-2-propanol Percent Error of Unknown A = |Expected BP - Theoretical BP | / Theoretical BP x100 = |81-82|/82 x100 = 1.22% error Discussion, Questions and Conclusion: The distillation process is used to purify compounds, such as 95% Ethanol & 5% Water and tert-butanol. In this lab the purification of 95% Ethanol & 5% Water by the use of the simple distillation process while Edward used
A(blue) B(orange) C(red) Total Total Mass(g) 28.05g 8.58g 7.3g 43.93g Number 32 11 8 51 Average Mass(g) 0.876g 0.78g 0.913g 0.861g Relative Abundance 0.6275 0.2157 0.1569 1.000 % Percent Abundance 62.75% 21.57% 15.69% 100% Relative Mass(g) 0.5497g 0.1682g 0.143g 0.8608g IV. Data Chart- V. Analysis- 6. Relative abundance is a specific type of particles divided by the total particles expressed as a number while percent abundance is expressed as the percentage of those specific particles within the total particles. When you add up the individual relative abundances, the result is 1.000. When you add up the individual
6. Copper has two stable isotopes,[pic]and [pic], with masses of 62.939598 amu and 64.927793 amu, respectively. Calculate the percent abundances of these isotopes of copper. 7. Chromium has four naturally occurring isotopes: chromium – 50 (4.35% at 49.946 amu) chromium – 52 (83.79% at 51.941 amu) chromium – 53 (9.50% at 52.941 amu), and chromium – 54 (2.36% at 53.939 amu) Calculate the average atomic mass of
(a.) q = 135.83 g ( 1cal. ( 25.5(C g ( C q(heat) = 3,463.7 cal. (b.) q = 135.83 g ( 4.18 J ( 25.5 (C g ( C q(heat) = 14,178.1 J 11.
1) 46/313 Harris st. 1/1/1 $390 1300 553 814 (LJ) Insp : 21 sat 10:00 2) 19/333 Bulwara rd 2/1/1 $475 1300 553 893 Insp : 21 sat 10:30~10:45 3) 14/313 Harris st. 1/1 1300 553 893/0403 185 117 (Ray white) Insp : 21 sat 11:~11:15 3) 70/732 Harris st. 3+1/2/2 $1000 02)9804 8288/ 02) 9804 6522 Insp : 21 sat / 11:15 4) 5/104 Clarence st. 1/1(1study) 1300 663 894 Insp : 21 sat 11:30~12:00 5) **409/243 Pyrmont st 1/1 $430 0411 804 925 Insp : 21 sat 12:30~12:50 10/558 Jones St 1/1 $400 1300 727 581 Insp : 21 sat 12:45~13:05 6) 908/743-755 George st. 3(study)/2/1 $790 0416 282 952 Insp : 21 sat 1:30~2:00 21 cadiga Ave 3/2/2+1 $950 0432 716 000/ 02)8586 7800 Insp : 25 wed / 4:30~5:00
86-1278) 485 U.S. 46 Retrieved from: http://www.law.cornell.edu/supct/html/historics/USSC_CR_0485_0046_ZS.html New York Times Co. v. Sullivan (No. 39) 376 U.S. 254 Retrieved from: http://www.law.cornell.edu/supct/html/historics/USSC_CR_0376_0254_ZS.html Stanley v. Georgia (No. 293) 394 U.S. 557 Retrieved from: http://www.law.cornell.edu/supct/html/historics/USSC_CR_0394_0557_ZS.html Miller v. California (No. 70-73), 413 U.S. 15 Retrieved from: http://www.law.cornell.edu/supct/html/historics/USSC_CR_0413_0015_ZS.html New York v. Ferber (No. 81-55) 52 N.Y.2d 674, 422 N.E.2d 523, reversed and remanded.
1 5.24 mL 10.061 g 2 5.49 mL 9.293 g 3 5.99 mL 8.055 g 4 6.51 mL 6.647 g 5 7.02 mL 5.189 g 6 7.51 mL 3.932 g Calculation: Error: Our percent error was -0.37%. % error = EV-AV * 100 % error = 2.69-2.70 * 100 = -0.37% AV
2021 13.29 263 | 27.09 784 2022 13.28 288 | 27.06 783 2023 13.45 244 | 27.13 739 2024 13.66 312 | 27.21 801 2025 13.74 349 | 27.19 751 2026 13.95 314 | 27.22 782 2027 14.0 398 | 27.28 719 2028 14.05 402 | 27.36 694 2029 13.97 326 | 27.4 748 2030 14.08 359 | 27.48 830 2031 14.16 441 | 27.47 770 2032 14.15 382 | 27.58 779 2033 14.19 363 | 27.59 754 2034 14.23 317 | 27.6 788 2035 14.33 361 | 27.64 782 2036 14.4 363 | 27.73 797 2037 14.5 409 | 27.8 800 2038 14.57 405 | 27.86 867 2039 14.54 391 | 27.96 778 2040 14.6 397 | 28.1 719 2041 14.61 412 | 28.14 787 2042 14.7 443 | 28.15 767 2043 14.73 450 | 28.16 811 2044 14.75 440 | 28.1 838 2045 14.75 424 | 28.15 809 2046 14.72 390 | 28.23 760 2047 14.88 388 | 28.32
9 | 1 | 1 | 50 | 441 | 96 | 11 | 1 | 1 | 54 | 458 | 96 | 12 | 1 | 1 | 56 | 458 | 104 | 12 | 1 | 1 | 56 | 508 | 106 | 13 | 1 | 1 | 56 | 538 | 126 | 14 | 1 | 1 | 56 | 568 | 126 | 16 | 1 | 1 | 60 | 592 | 145 | 19 | 1 | 1 | 60 | 767 | 156 | 20 | 1 | 1 | 60 | 812 | 156 | 20 | 1 | 1 | 62 | 823 | 185 | 21 | 1 | 1 | 64 | 860 | 203 | 22 | 1 | 1 | 64 | 860 | 203 | 23 | 1 | 1 | 69 | 860 | 234 | 24 | 1 | 1 | 73 | 883 | 234 | 24 | 1 | 1 | 73 | 944 | 234 | 26 | 1 | 1 | 74 | 1076 | 234 | 28 | 1 | 1 | 74 | 1076 | 241 | 28 | 1 | 1 | 80 | 1076 | 243 | 32 | 1 | 1 | 88 | 1132 | 244 | 35 | 1 | 1 | 93 | 1241 | 251 | 35 | 1 | 1 | 100 | 1247 | 261 | 36 | 1 | 1 | 103 | 1426 | 263 | 37 | 1 | 1 | 105 | 1426 | 316 | 37 | 1 | 1 | 105 | 1438 | 325 | 37 | 1 | 1 | 105 | 1456 | 325 | 40 | 1 | 1 | 106 | 1466 | 328 | 41 | 1 | 1 | 109 | 1499 | 328 | 45 | 1 | 1 | 109 | 1617 | 337 | 45 | 1 | 1 | 109 | 1764 | 338 | 45 | 1 | 1 | 114 | 1785 | 338 | 47 | 1 | 1 | 114 | 1785 | 338 | 47 | 1 | 1 | 122 | 1897 | 362 | 48 | 1 | 1 | 122 | 2018 | 373 | 49 | 1 | 1 | 122 | 2305 | 386 | 50 | 2 | 1 | 128 | 2312 | 399 | 51 | 2 | 1 | 129 | 2730 | 399 | 52 | 2 | 1 | 129 | 2764 | 401 | 53 | 2 | 1 | 129 | 2764 | 409
| %Rec | Calories | 1761.87 | 2200 | 80.09% | Pro (g) | 77.57 | 48 | 161.60% | Fat (g) | 82.29 | 73.33 | 112.22% | Carb (g) | 186.98 | | -- | Na (mg) | 3529.7 | 2400 | 147.07% | vitA (IU) | 759.96 | 4000 | 19% | vitC (mg) | 9.55 | 75 | 12.73% | satF (g) | 22.91 | 24.44 | 93.74% | Chol (mg) | 518.56 | 300 | 172.85% | Analysis Results Nutrient | Total | Rec. | %Rec | Calories | 1761.87 | 2200 | 80.09% | Pro (g) | 77.57 | 48 | 161.60% | Fat (g) | 82.29 | 73.33 | 112.22% | Carb (g) | 186.98 | | -- | Fiber (g) | 8.17 | 30 | 27.23%