the plate. Then remove the chamber from the tank, draw a light line across the solvent front and outline all of the spots while under ultra-violet light. Measurement must now be taken of cach spot on both plates so that an Rf value may be calculated for each. Rf- distance traveled by substance distance traveled by solvent Remember, distances are measured from the lower line of the chromatogram, not the lower edge. Al distances are to be measured in centimeters-(cm)-and tenths-of centimeters (millimeters) so that each measurement is recorded with 2 significant figures. (Example 3.7 cm) When calculating the Rf values only 2 significant figures should be recorded (example Rf = 0.63). Please note that even though the substance distance and %3D Table showing the names of the compounds/samples, and their calculated Rf values Distance compound Travelled (cm) Samples Distance Solvent Rf Value Travelled Caffeine 0.8cm 4.8cm 0.17 Phenacetin 2.8cm 4.8cm 0.58 Salicylamide Unknown #28 3.9cm 4.8cm 0.81 0.5cm 4.8cm 0.10

the plate. Then remove the chamber from the tank, draw a light line across the solvent front and outline all of the spots while under ultra-violet light. Measurement must now be taken of cach spot on both plates so that an Rf value may be calculated for each. Rf- distance traveled by substance distance traveled by solvent Remember, distances are measured from the lower line of the chromatogram, not the lower edge. Al distances are to be measured in centimeters-(cm)-and tenths-of centimeters (millimeters) so that each measurement is recorded with 2 significant figures. (Example 3.7 cm) When calculating the Rf values only 2 significant figures should be recorded (example Rf = 0.63). Please note that even though the substance distance and %3D Table showing the names of the compounds/samples, and their calculated Rf values Distance compound Travelled (cm) Samples Distance Solvent Rf Value Travelled Caffeine 0.8cm 4.8cm 0.17 Phenacetin 2.8cm 4.8cm 0.58 Salicylamide Unknown #28 3.9cm 4.8cm 0.81 0.5cm 4.8cm 0.10

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter2: Crystallization

Section: Chapter Questions

Problem 2Q

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10 View History Bookmarks People Tab Window Help G convert c to O GroupMes E Buy Essay On x A ALEKS - Jacq x Hoc Chapter 5: Th x Hue Dashboard -> A www-awn.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IQİHQRDYV_6Ux63SypJXz0Coxvwqgg4JkWI74Meq7fCi1Pjl. O GASES Jacqu Interconverting molar mass and density of ideal gases A sample of an unknown compound is vaporized at 200. °C. The gas produced has a volume of 1760. mL at a pressure of 1.00 atm, and it weighs 1.54 g. Assuming the gas behaves as an ideal gas under these conditions, calculate the molar mass of the compound. Round your answer to 3 significant digits. mol Explanation Check O 2021 McGraw-Hill Education, All Rights Reserved. Terms of Use | Privacy MacBook Air
em1.png chem3.png Part 3: Q9 Average absorbance Flask 8 Flask 9 Flask 10 Flask 11 Part 3: Q9 Flask 8 Flask 9 Flask 10 Flask 11 Part 3: Q10 Flask 8 Flask 9 Flask 10 Flask 11 Q Part 3 0.146 [Fe] -0.002mol/L 0.166 volume 5.00mL 0.215 0.294 [FESCN mol/L) ✪ 4.59* 10 5.18*10* 6.64 x 10 9.08*10* [Fe(mol/L) 5.00 x 10 5.00*10* Y=3362x -0.0083 R¹ 0.9993 5.00 x 10 5.00*10* (Amounts of flask 8 (9 - 11's values are in the spreadsheet) 1:1 Ratio so, Molarity of Fe(NO3))3 = 0.2M Volume of Fe(NO3))3 = 5.00mL 71% Moles of Fe³= Molarity x volume(L) Moles of Fe = 0.2M × 0.005L = 1× 10-³mole 68% [SCN ](mol/ 4 x 10-4 5 x 10-4 7*10* 1*10* الخا chem2.png Concentration of Fe³ 9, X = mole of Fe³1x10³ mole Volume 0.0054 Ⓒ 8, Average absorbance for solution 8 (same for 9 - 11) Average absorbance for flask 8 = sum of all absorbances / number of readings (0.145 +0.147 +0.148) 3 Using equation of calibration curve's line(slope) of best fit, the average absorbances of the unknown concentrations to determine…
CH3CH2COCI/FeCl3 : Cl2/FeCl3 m. be 1) Zn(Hg)/HCI 2) NaOH
Content C °- OWLv2 | O × Google Do G google slid x Inbox (4,5 x Certificate ☑ > Course E X Cengage L ✓ b Calculate ✓ ChatGPT × + prod03-cnow-owl.cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator-assignment-take E4 CH 16 17 and 18 [References] Question 1 1 pt This question has multiple parts. Work all the parts to get the most points. Question 2 2 pts Question 3 1 pt Question 4 2 pts Trimethylamine, (CH3)3 N, is a common reagent. It interacts readily with diborane gas, B2H6. The latter dissociates to BH3, and this forms a complex with the amine, (CH3)3 N→BH3. The reaction between trimethylamine and borane is shown. Question 5 1 pt Question 6 × 2 pts Question 7 1 pt CH3 H CH3-N: + B CH3 H CH3 H CH3 -N- CH3 H Question 8 2 pts Is the BH3 fragment a Lewis acid or a Lewis base? To decide this, answer the following questions: Question 9 1 pt Question 10 2 pts a Which of the following is a definition of a Lewis acid? Question 11 1 pt Question 12 1 pt proton donor electron pair…
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Cengage Learnir × | Cengage Learnir x | Cengage Learnir X OWLv2 | Online X × Ar Ex3 CH 14 and 15 prod03-cnow-owl.cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?lo Question 1 1pt This question has multiple parts. Work all the parts to get the most points. Question 2 1pt Question 3 Question 4 2 pts 2 pts Data in the table were collected at 540 K for the following reaction: Question 5 1 pt CO(g) + NO2(g) → CO2 (g) + NO(g) Initial concentration (mol/L) Initial rate Question 6 Question 7 2 pts 1pt [CO] [NO2] (mol/L. h) 5.1 × 10-4 Question 8 Question 9 2 pts 1pt Question 102 pts Question 111pt 0.35 x 10 4 3.9 × 10-8 5.1 x 10-4 0.70 × 10-4 7.9 x 10-8 5.1 × 10-4 0.18 × 10-4 2.0 × 10-8 1.0 × 10-³ 0.35 × 10-4 7.7 × 10-8 Question 12 1 pt 1.5 x 10-3 0.35 × 10-4 1.2 × 10-7 Question 13 1 pt Question 14 1pt Question 151 pt a Determine the reaction order with respect to each reactant. Order with respect to CO: 1 ✓ ✓ 4 Order with respect to NO2: 1 V✓ Progress: 13/15 items Due Mar 28 at…
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