Consider the following chromatogram.     The early eluting peaks and later eluting peaks exhibit a problem. Propose a way in gas chromatography to eliminate both problems.

Q: 1. A student has prepared the following compounds in the lab. He measured the melting point of each…

A: Since you have asked multiple questions, we will answer only first question for you. In order to get…

Q: Match each structure to its mass spectrum.

A: a.

Q: 1- What is the definition of volatile matter? 2-What is the mobile phase in an experiment? a)…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: It is important to check the information attached to a product before using it.* True False Consists…

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Q: Gas chromatography would NOT be appropriate to use for a sample that is decomposed by heat a mixture…

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Q: To analyze the residual toxins and sugar content of a sample of a fruit, propose and discuss the…

A: When two more substances exist in a solution with definite proportions, it leads to the formation of…

Q: 100 73 a. A 80 60 40 57 20 uli 90 100 10 20 30 40 50 60 70 80 miz 100 100 b. 45 59 C. В C 80 80 60…

A:

Q: A student is asked to prepare 45.0 mg of a sample to be used in a mixed melting point test. The…

A: Given, Mass of the sample needed to be prepared = 45.0 mg % of A in the sample = 65.0 % % of B in…

Q: What type of distillation set up is in the picture? dang fsk recelving fak

A: Distillation is a the process of separation of liquids on the basis of their boiling points.…

Q: According to the chromatography the value of the distance traveled by the solvent is:

A: We need to calculate the distance traveled by solvent.

Q: Which of the following statements is true?   After drying a sample in the oven, you can place it…

A: There are three types of substances or matter. These three types are solid, liquid and gas.…

Q: 184.5 m ÷ 0.31 s S mol 0.9 L X 27. L |mol 2 3 cm × 0.30 cm = cm

A: Significant figures are the meaningful digits in a quantity. Any non-zero digit is a significant…

Q: chromatography

A: chromatography is a process in which the mixture is separated.  In this process we dissolve the…

Q: In a simple set-up, a mixture is heated and the component with the lower boiling point vaporizes…

A: Chromatography is the laboratory technique for the separation and isolation of a variety of samples…

Q: More than 40% of the world's population has limited access to clean water. One proposed method for…

A: Separation technique is used for the purification and separation of substance. Some of the…

Q: How many mg does an 830 kg sample contain?     a. 8.30 × 10-4 mg   b. 8.30 × 107 mg   c. 8.30…

A: Dimensional analysis is a method to convert from one quantity to another by using conversion factors…

Q: Which of the following is paper chromatography NOT useful for? a) Determine the identity of a…

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Q: The two stages that take place during distillation are filtration followed by evaporation…

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Q: Group

A: Dear student I have given answer to your question in the image format.

Q: The mass spectra of 1-methoxybutane, 2-methoxybutane, and 2-methoxy-2-methylpropane are shown below.…

A: a. Analyzing mass spectrum for figure (a)

Q: A 1.232-gram sample of copper complex weighed 0.783 g after heating. What is the percent of volatile…

A: Given information is as follows; Weight of the sample of copper complex = 1.232 g Weight of the…

Q: A sample is said to be homogeneous if 1. OThe sample has a different composition in different parts…

A: Correct answer is (2.) The sample is completely mixed up. Homogenous mixture has uniform mixture and…

Q: The solvent moves 3 cm in about 10 minutes. Why shouldn't the experiment be stopped at that time…

A: In chromatography, the solvent along with components moves through the chromatographic sheet very…

Q: Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Unknown final buret reading (mL) 26.33 30.29 33.21…

A: Volume dispensed = Final burette reading - initial burette reading  Using dilution law- M1V1 = M2V2…

Q: Filtration of samples A, B, and C show no residue left. After letting them dry in different beakers,…

A: Filtration is a technique to separate insoluble part from the soluble part in a solution.  No…

Q: Gas Chromatography can have which of the following stationery phases and/or mobile phases: O A…

A: In gas chromatography there are two phases , stationary phase and mobile phase .  Mobile phase is…

Q: A heterogeneous mixture Is the one which O has one phase O has a uniform composition throughout O…

A: The question is based on the concept of solutions . We have to identify which of the given…

Q: Add the following quantities:    4.05 kg + 567.95 g + 100.1 g

A:

Q: 1. If the reference range for serum Ca is 8.5-10.5 mg/dL, would a result of 2.3 mmol/L be within…

A: Given that, in serum the concentration of Ca2+ ion is 2.3 mmol/L. The molecular mass of Ca is 40.08…

Q: Which of the following is used as a carrier gas in gas chromatography? A) Helium Carbon dioxide…

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Q: 4.A student carried out a simple distillation on a compound known to boil at 124°C and measured a…

A: so as there is difference between actual boiling point and measured boiling point , there may be…

Q: Can paper chromatographt be used to separate and identify very volatile substances? Explain.

A: Paper chromatography is a technique used to separate components based on the differential migration…

Q: Using your fork to separate tomatoes, lettuce, cucumber, onions in your salad is an example of: *…

A: Tomatoes , lettuce, cucumber, onions in salad are having large size.

Q: Analyze each statement (A and B) whether they are true or false. Use the choices below in answering…

A: Introduction: Soil contains clay, silt, and sand. The change in the different proportions gives rise…

Q: Br 1) NaCN, DMSO 2) excess LАН 3) Н20

A: We have given the organic reaction and we have to find the major product of the reaction.

Q: 42.Primary Standard reagent used in standardization of 0.1N sodium hydroxide a. Sulfamic acid c.…

A: A primary standard is a solution that itself do not need any calibration and is used for calibration…

Q: Why high performance liquid chromatography is an important  technique in the fields of chemistry…

A: MAIN USE OF HIGH PERFORMANCE LIQUID CHROMATOGRAPHY ARE IDENTIFYING  ,QUANTITATIVELY AND PURIFYING…

Q: Why is it important to always let hot objects cool before weighing? Convection currents that…

A: A plastic weigh boat or weighing paper may be damaged by a very hot sample. Usinh hot object…

Q: Consider the following chromatogram. INJ a) Propose a way in gas chromatography to eliminate both…

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Q: ns) You use paper chromatography to separate the following two molecules. The stationary phase is…

A: In the question, hexane coated silica means that the stationary phase is non polar.

Q: Describe a chromatogram and explain what type of information it contains.

A: Chemistry is a vast field of science. It involves dealing with various elements and their compounds…

Q: David decides that it is better to create a blend containing 50% NaCI, 33% KCI and 17% CaCl2, than…

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Q: The distillation flask is best     completely filled with mixture   as large as available…

A: At the beginning of the distillation, the distillation pot should be between one-half full and…

Q: A quality-control laboratory analyzes a product mixture us-ing gas-liquid chromatography. The…

A: Gas chromatography is a typical method of chromatography used in analytical chemistry to isolate and…

Q: During a laboratory experiment, a student mixed two homogeneous aqueous solutions.  After mixing a…

A: Since the solution is having a precipitate in it. Hence we want to separate the solid from liquid.

Q: mass of unknown crude for acid and neutral is 0.03 grams mass of unknown recrystallized for acid and…

A: Solution:  Here we have binary mixture of unknown acid and neutral compound. This mixture is exactly…

Q: When performing the water displacement method , this observation will increase the volume of the…

A: The correct answer is option a) bubbles are produced, because of the evolution of gas.

Q: gravity filtration

A: Gravity filtration – Gravity filtration is a method in which most of the work is dependent on…

Q: 0.25M HCl (500 mL) will be prepared from 37.2%(w/w) with density 1.19 g/mL

A: Density of intial Hcl solution = 1.19 g/mL Concentration of intial HCl sol. = 37.2% Final conc. Of…