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5. Shown here is a chromatogram that shows the separation of blue food dye (left) and...
10000 page 6 9.10 Two chromatograms are shown. Both chromatograms show the separation of the same...
10000 page 6 9.10 Two chromatograms are shown. Both chromatograms show the separation of the same mixture using the same chromatography column with the same flow rate, but under different conditions Chromatogram #1 Chromatogram #2 compound (a) If the chromatograms were obtained by gas chromatography, which one used the higher column temperature? Explain briefly, showing that you understand the effect of temperature on retention in gas chromatography (b) If the chromatograms were obtained by liquid chromatography, which one used the...
Pre-Laboratory Questions SHOW ALL WORK TO RECEIVE CREDIT. 1. What is the purpose of the mobile...
Pre-Laboratory Questions SHOW ALL WORK TO RECEIVE CREDIT. 1. What is the purpose of the mobile phase in chromatography? 2. What is the Ry value for a component in a sample? Lab 3: Chromatography 3. A student developed chromatograms for pure substances A, B, and C, and an containing some of the substances A, B and C. Calculate the values of A, , component of the unknown mixture. Identify the substances present in the unknown pure substances A, B, and...
LEILU.23.27 Eugenia Bueso-Alas: Attempt 2 UUTUUU-Dye SD Incorrectly Low Question 3 (20 points) An unknown food-dye...
LEILU.23.27 Eugenia Bueso-Alas: Attempt 2 UUTUUU-Dye SD Incorrectly Low Question 3 (20 points) An unknown food-dye is analyzed by the method used in this experiment. The absorbance of 5 standard solutions is plotted vs. their concentration (molarity) and a straight line is obtained with the formula: Abs = 4.350x +0.06 An unknown food-dye soluton is diluted and it's absorbance is found to be 0.65. What is the molarity of the diluted unknown, to two significant figures? Do not type units...
1. A data set that includes the shows on a station during the day would be...
1. A data set that includes the shows on a station during the day would be classified as what type of data? nominal, ordinal, interval, ratio 2. What type of data collection might be best to estimate the amount of time individuals spend socializing? survey, observational, experiment, simulation 3. What type of data collection might be best to study how many books students bring into the media center during finals week? experiment, observational, simulation, survey 4. You need to study...
1. What is the origin of the colors of the ink in the pens? Is the...
1. What is the origin of the colors of the ink in the pens? Is the ink made up of several dyes or just one? How do the colors of the dyes which are used result in the color of the ink which we observe? This question is from our chromatography lab where we saw the different color dyes in each pen. I know it has to do with their polarity, but I'm not sure why the different colored dyes...
Red food dye (FD&C Red 40, also known as allura red AC) has the formula C18H14N2Na2O8S2....
Red food dye (FD&C Red 40, also known as allura red AC) has the formula C18H14N2Na2O8S2. 1. What is the molar mass of FD&C Red 40? To make a solution you take 0.0097 g of FD&C Red 40. 2. How many moles of FD&C Red 40 are in your sample? You dissolve the sample of FD&C Red 40 in enough water to make 250.0 mL of solution. We call this the stock solution. 3. What is the concentration of the...
help needed with this problem set Refer to the HPLC chromatograms below for a 5-component mixture of organic acids for the following questions. The specific HPLC parameters for chromatogram A (...
help needed with this problem set
Refer to the HPLC chromatograms below for a 5-component mixture of organic acids for the following questions. The specific HPLC parameters for chromatogram A (top) are described in the figure title and the insert. You only need the lecture notes and/or your personal experience to answer those questions. Mobile phase: 30 % MeCN, 70 % TFA, 0.1 M (pH 2.0) low rate: 1.0 mL/min 2Benzok Acid Maleic Aci 1. (a) Which component has the...
5. Shown below is the structure of borazine on the left. The sketch on the right...
5. Shown below is the structure of borazine on the left. The sketch on the right is the same molecule rotated by 90° showing the Pz orbitals on each N atom. IM HN / NH IOI HB BH ZI Determine the symmetry of the group of 3 Pz orbitals on the N atoms.
The figure shows an elaborate setup of a blue cord wrapped around six pulleys supporting three weights (two of which hav...
The figure shows an elaborate setup of a blue cord wrapped around six pulleys supporting three weights (two of which have identified weight in N, one of which is not given). The pulleys are supported by the red cables from the ceiling which are labeled with numbers 1-4. The blue cord is attached to the ceiling at its right end, but attached to one of the pulleys at its left end. The weights are suspended from the pulleys using pink...
Left figure below shows a full bridge inverter with an inductive filter. The switches are controlled 1. to generate the...
Left figure below shows a full bridge inverter with an inductive filter. The switches are controlled 1. to generate the voltage Vbridge as shown in the right figure. Note that the turn-on switches are delayed by an angle 6, leading to periods where Vbridge is zero. load DC DC cT (a) As a first order approximation, we can calculate the fundamental component of the voltage, and do a source replacement using only the fundamental component, as shown below. Find an...
10000 page 6 9.10 Two chromatograms are shown. Both chromatograms show the separation of the same mixture using the same chromatography column with the same flow rate, but under different conditions Chromatogram #1 Chromatogram #2 compound (a) If the chromatograms were obtained by gas chromatography, which one used the higher column temperature? Explain briefly, showing that you understand the effect of temperature on retention in gas chromatography (b) If the chromatograms were obtained by liquid chromatography, which one used the...
Pre-Laboratory Questions SHOW ALL WORK TO RECEIVE CREDIT. 1. What is the purpose of the mobile phase in chromatography? 2. What is the Ry value for a component in a sample? Lab 3: Chromatography 3. A student developed chromatograms for pure substances A, B, and C, and an containing some of the substances A, B and C. Calculate the values of A, , component of the unknown mixture. Identify the substances present in the unknown pure substances A, B, and...
LEILU.23.27 Eugenia Bueso-Alas: Attempt 2 UUTUUU-Dye SD Incorrectly Low Question 3 (20 points) An unknown food-dye is analyzed by the method used in this experiment. The absorbance of 5 standard solutions is plotted vs. their concentration (molarity) and a straight line is obtained with the formula: Abs = 4.350x +0.06 An unknown food-dye soluton is diluted and it's absorbance is found to be 0.65. What is the molarity of the diluted unknown, to two significant figures? Do not type units...
help needed with this problem set
Refer to the HPLC chromatograms below for a 5-component mixture of organic acids for the following questions. The specific HPLC parameters for chromatogram A (top) are described in the figure title and the insert. You only need the lecture notes and/or your personal experience to answer those questions. Mobile phase: 30 % MeCN, 70 % TFA, 0.1 M (pH 2.0) low rate: 1.0 mL/min 2Benzok Acid Maleic Aci 1. (a) Which component has the...
5. Shown below is the structure of borazine on the left. The sketch on the right is the same molecule rotated by 90° showing the Pz orbitals on each N atom. IM HN / NH IOI HB BH ZI Determine the symmetry of the group of 3 Pz orbitals on the N atoms.
Left figure below shows a full bridge inverter with an inductive filter. The switches are controlled 1. to generate the voltage Vbridge as shown in the right figure. Note that the turn-on switches are delayed by an angle 6, leading to periods where Vbridge is zero. load DC DC cT (a) As a first order approximation, we can calculate the fundamental component of the voltage, and do a source replacement using only the fundamental component, as shown below. Find an...
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