TLC, IR, MP TEMPLATE

Use the data in the attached pictures to determine the % error.

. Experimental data mass (g) and volume (mL) of a substance was gathering, recorded, and plotted in Figure 1. a. Correctly la bel the graph axis (include units). b. The equation for the trendline (y = mx + b) is displayed on the graph. Which variable, in the equation, equals the density of the substance? A1 feMass B D Mass Volume 2. 1,8 2,19 Mass vs. volume 3 3,15 4,08 4,13 5,57 7. 6,7 8,34 6. y= 0,794x-0.064 8 6. 10 11. 2 4. 10 13 14 15 Figure 1: Plotting of Mass vs. Volume of a Substance. bttps://www.chemisalforums.com/index.php?toric=69575.0 Life University CHM 111 March 2021 Default Page Style English (USA)

What is the chemical equation for main test and for the confirmation test?

A piece of filter paper is placed in the TLC developing chamber to: Choose one: provide a lining for the TLC plate to rest on.   help the chamber saturate with the developing solvent's vapor.   make it easier to visualize the solvent front level.   protect the TLC plate.

Pls answer 3 & 4

EXPERIMENT : Determination of Temporary and Permanent Hardness of Water .  I want Result & Analysis for this experiment includes the Precautions

If the two trials vary by more than 4 seconds, run a third trial and average the two closest times in seconds.   help me fill the table

Order: heparin sodium 20,000 units IV in 500 mL of 0.5 NS to infuse at 1,200 units/hour. What is the flow rate in mL/h? (Enter numeric answer rounded to the nearest whole number.)

Pick the HETP (height equivalent to a theoretical plate) listed below that represents the most efficient column. O1 mm/plate O 1 micrometer/plate 1 cm/plate 1 m/plate

8

Nitrous Acid Test Procedure: Make a solution of  4 grams NaNO3 in 16 mL water. Put 2 mL of concentrated hydrochloric acid into a 10x75-mm test tube and add 0.5 ml of amine. Cool the solution in a water-ice slush to zero degrees celcius. Add the nitrile solution slowly, dropwise, until a drop of the reaction mixture gives a blue spot on starch-iodide paper.  The following should be tested: (NOTE: Include the observations and reaction equation) A. PRIMARY ALIPHATIC AMINES (Like Butylamine of Cyclohexylamine) B. PRIMARY AROMATIC AMINES I. Aniline + nitrous acid; then heat. II. Aniline + nitrous acid; then B-Napthol.

anch of the following components cannot be detected by gas chromatography? 4 Essential oils Alcohols b) Volatile compounds d) Non-volatile compounds 13- is measured as time elapsed from the point of injection to the peak maximum? a)-Column efficiency d)- Delectability c)-Retention time 14- Which of the following can be used to detect the components in gas chromatography a) non-volatile compounds b) volatile compounds c) Salts d) b&c 15-Which of the following methods is often referred to as mechanical separation processes. a)-Gas Chromatography b)-column chromatography c)- Sedimentation 16- For obtaining better resolution in TLC. and then developed with a second solvent at right angles to the first a) Stepwise b) Descending e) Ascending 17- This is defined as transport of electrically charged particles in a direct-current electric field a) ion exchange chromatography b) Electrophoresis c) ultracentrifuge d) exclusion 18-This figure indicates to schematic Diagram of a) Gas chromatography…

CATION CONFIRMATORY TEST OBSERVATION ADDED REAGENT(S) Excess NH3 KSCN K4Fe(CN)6 K3Fe(CN)6 Na₂C₂04 NaOH (in evaporating dish) ANION CONFIRMATORY TEST OBSERVATION ADDED REAGENT(S) HNO3, Fe(NO3)3 HNO3, KMnO4 (to the ppt) CH3COOH MgCl2 6M H₂SO4, FeSO4, 18M H₂SO4 POSSIBLE ION(S) PRESENT? OBSERVATIONS brown ppt Blood red complex Prussian blue ppt NVR NVR Litmus paper: red to blue OBSERVATIONS Yellow aqueous layer; pink toluene layer Yellow-brown aqueous layer; pink toluene layer N/A NVR NVR

I'm confused can you help me for steps data analysis in AFM

Which is correct?     Random errors affect accuracy and systematic errors affect precision.     An accurate result shows agreement with the true or accepted value.     Precise results can contain significant random error, but little systematic error.     The standard deviation is a good measure of accuracy.   Polydimethylsiloxane (PDMS) stationary phases have low polarities.  Which of the following statements is TRUE about gas chromatography using PDMS stationary phases?     The gas chromatography column is typically packed with silica microparticles.     An oven is used to control the column temperature because a constant temperature is always needed in gas chromatography     Octane (C8H18, boiling point: 126 ºC) is eluted later than dodecane (C12H26, boiling point: 216 ºC)     3-Pentanone ((C2H5)2CO, boiling point: 102 ºC) is eluted later than propanol (CH3CH2CH2OH, boiling point: 97 ºC)

Help with TLC analysis, talk about completion or purity  (Right) A) Step 1: SM Standard, Step 1 Crude (Middle) B) Step 3: Step 2 Recrystallized, Step 3 Recrystallized  (Left) C) Step 2: Step 1 Crude, Step 2 Crude, Step 2 Recrystallized

A chemical has a molecular weight of 2200. you need to make 10mM stock solution and treat cultured cells at 100 uM. You weigh the chemical in an Eppendorf tube. You find the weight is 3.6 mg. how to prepare stock solution and how to treat the cells when volume of culture medium is 3 mL

A chromatographic analysis is performed with a sample containing toluene and benzene. The column length was 25 m and the flow rate 45 mL/min. Solute tR air 1.75 benzene (A) 7.00 1.85 toluene (B) 16.10 1.65 Calculate the theoretical plate height for each peak. Benzene: 109 mm/plate and Toluene 16 mm/plate Benzene: 105 mm/plate and Toluene 49.7 mm/plate Benzene: 172 mm/plate and Toluene 175 mm/plate Benzene: 119 mm/plate and Toluene 181 mm/plate

50 Percentage Red No. 40 Soln 100% 80% 60% 40% Table 4.1: Dilutions of Red No. 40 & Absorbance Volume of Red No. 40 Soln (mL) 10me 8mL опи 4mL Percentage Red No. 40 Soln 100% 80% 60% 40% 20% Volume of DI Water (mL) OML 2mL LIML M UML 8ML Table 4.2: Dilutions of Red No. 40 & Absorbance Concentration Red No. 40 2. Report the wavelength with the maximum absorbance of Red No. 40 dye. Absorbance 20% 2ML Part A: Making a Calibration Curve for Beer's Law 1. Calculate the concentrations of each of your diluted Red No. 40 solutions and add these to Table 4.2. Show at least one sample calculation in the space below. 0.251 0.192 Total Volume 0.181 0·119 0.060 (mL) 10 mL 10 mL 10 mL 10 mL 10 mL

(50×10^5)^2/3 Round to 3 sig figs and show work please

What is the equation for the number of plates in a SPE cartridge when given: void volume retention volume maximum sample volume breakthrough volume

Plot a professional quality standard curve (absorbance vs. protein amount in µg) with an appropriate title and caption underneath the plot from the data give above. The caption should include the best-fit data.

complete the table  Procedure Preheat the hotplate stirrer with an aluminum block to 45–50 °C (do not exceed 55 °C). To a clean 5-mL conical vial equipped with a Teflon-coated magnetic stir vane, add 4- bromo-nitrobenzene (152 mg, 0.750 mmol, 1 equiv) and THF (150 μL). Cap the vial and stir the mixture at 45–50 °C for about 30 s to partially dissolve the substrate; don’t stir too fast to avoid splashing the contents on the walls of the vial. Add ammonium chloride (120 mg, 2.2 mmol, 3 equiv), carbonyl iron powder (CIP; 210 mg, 3.80 mmol, 5 equiv), the solution of TPGS-750-M (2% in water, 1.5 mL), and 1 drop of concentrated HCl. Cap the vial and place it on the hot plate stirrer, stirring at 45–50 °C. While the reaction mixture is stirring, prepare an approximate 2% solution of the reactant in DCM (1 sample per 3–4 students) by dissolving 10–15 mg of 4-bromo-nitrobenzene in 0.5 mL of methylene chloride. Prepare the solvent mixture for the mobile phase (25% ethyl…

Conductivity versus Concentration 20000 18000 y = 1172.5x + 127.94 R2 = 0.9995 16000 14000 12000 10000 8000 6000 4000 2000 4 6 8 10 12 14 16 18 Concentration (m/m%) Based on the calibration curve above, how many of the following statements are true? The R2 value is close to 1. • The data is accurate but it is not precise. • The data is precise but it is not accurate. • The R< value is not close to 1. • The data fits the curve well. • The data fits the curve poorly. • The data is accurate and precise. Conductivity increases with increasing concentration. Conductivity decreases with increasing concentration. 1 3 4 O O O O C Conductivity (uS/cm)