1. a. A sample consisting of 1-bromopropane and 1-chloropropane is injected into a gas chromatograph equipped with a nonpolar column. Which compound has the shorter retention time? Explain your answer. b. If the same sample were run several days later with the conditions as nearly the same as possible, would you expect the retention times to be identical to those obtained the first time? Explain.
Q: Your breakfast this morning was so nutritious! You had two eggs, a slice of toast and some orange…
A: Physical changes are those changes in which there is no change in the chemical composition of a…
Q: According to Charles's law, where pressure remains constant, the volume and temperature of a fixed…
A: According to Charles's law, where pressure remains constant, the volume and temperature of a fixed…
Q: True or False? Left hand side (LHS) will be the anode of this system. Cu 0.001M CUSO4 True False DVM…
A: An electrochemical cell in which the two electrodes are the same but the concentrations of these two…
Q: Determine the empirical formula (in the format CxHyO₂) for a compound with 40.00% C, 6.71% H and…
A:
Q: If a NaCl solution contains 12 mEq of NaCl in each teaspoonful, how many milliliters will provide 9…
A:
Q: A neutral atom has the following electron configuration: 1s²2s²2p 3s²3p² What is the chemical symbol…
A:
Q: A commercial research organization is planning to develop a sensor to detect methyl parathion that…
A: The chronic daily intake for the case of Ingestion of contaminated liquid is given by, CDI = (CW x…
Q: Find the number of moles of water that can be formed if you have 194 mol of hydrogen gas and 92 mol…
A: 194 mol of hydrogen gas and 92 mol of oxygen gas gives 'n' moles of water. Number of moles (n) of…
Q: 4) Draw the lowest energy conformation for the following IIII..
A: The question belongs to stereochemistry. Here we have to avoid 1,3- diaxial interaction only. The…
Q: Which of the following is NOT a characteristic of gases? Choose all that apply. Gases may be…
A: There are mainly three states of matter - solid,liquid and gas. Gases has many unique…
Q: A mercury manometer is used to measure pressure in the apparatus to the left. Calculate the pressure…
A:
Q: when 69.0 g of lead was heated im excess oxygen, 79.6 g of an oxide of lead was obtained. what is…
A:
Q: A compound of cesium and iodine contains 65.62 g of metal and 62.54 g of nonmetal. How many…
A: Given that A compound of cesium and iodine contains 65.62 g of metal and 62.54 g of nonmetal. The…
Q: Create a flowchart showing the energy transformations needed to generate electricity from each of…
A: To solve this problem we will use the given follow chart . And for the heating curves we match the…
Q: The percent by mass of phenol (MM = 94.11 g/mol) in an aqueous solution is 10.9%. What is the…
A:
Q: A water-soluble salt formed by Hg2+ and acetate 47.863 g was dissolved in a solution containing…
A:
Q: The possible charge(s) of the In (indium) ion is (are): O +1, +2, +3 O +1, +2 +1, +3 O +3 +2, +4
A: Transition metals show variable oxidation states and their oxidation states differ by one unit.…
Q: What is the mole fraction of solute when 1.85 mols of ethanol is added to 8.5 mols of water?
A:
Q: Consider modeling the concentration of a chemical in a lung using the table below. ( Fill the…
A: Given, Volume of lungs = 3.5 L Starting concentration co=0.1mmolL Volume of air inhaled and exhaled…
Q: Determine both the freezing point and boiling point of a 1.50m aqueous solution of ammonium…
A:
Q: A person on vacation in another country paid a large price for a necklace pendant that was supposed…
A: Please find your solution below : According to Archimedes principle, a body immersed in a fluid…
Q: 2+ Zn(s) + Cu²+ (aq) → Zn²+ (aq) + Cu(s) Give your answer numerically, assuming a measure of k
A:
Q: What are the number of hydrogens in the alkane compound C8HX
A: The general formula for alkanes is CnH2n+2 where n is the number of carbon atoms in the molecule.
Q: of the principal organic product of each reaction. Label or SN2 (c) Br CH3 C-OH CH₂₁ (d) HOCH₂CH₂…
A:
Q: Hi, could someone help me draw the conjugate acid and conjugate base for this structure? I’m trying…
A: In this question, we have to draw the conjugate Acid and conjugate Base for the given compound.
Q: in the reaction, NIS + 02 - NiO +SO2, what should be the coefficient of NiO to balance
A: The Chemical reaction follows the law of conservation of mass. According to the law of conservation…
Q: What is the mass percent of sugar in a beverage if 450.8 g of the drink contains 36.4 g of sugar?
A:
Q: Hydrocortisone (shown below) is a steroid hormone used to treat inflammation, allergies, and skin…
A:
Q: % Transmittance 6. Deduce the structure of a compound with the molecular formula C₂H₁404 that…
A:
Q: 1. The average American household consumes 11,000 kWh per year. a. If there are 3.6 x 10° J in a…
A: Your answers for #(a), (b), and (c) are not correct. The correct answer and solution are shown…
Q: * Your answer is incorrect. Is the following a meso compound? No, because it cannot be superimposed…
A: Meso isomers :- Meso isomers is a non-optically active stereoisomer of any compound. It contains at…
Q: What volume of a 0.0100 M silver nitrate would be required to precipitate all of the iodide in 200.0…
A:
Q: Briefly explain how protein breaks down in the body
A: Amino acids are organic compounds that contain both amino and carboxylic acid groups. Living things…
Q: A cylinder with a movable piston contains 2.00 gg of helium, HeHe, at room temperature. More helium…
A: mass of He = 2.00 g atomic mass of He = 4.00 g/mol mole of He = n1 = 2.00 g /4.00 g/mol = 0.5 mol…
Q: Magnesium oxide (MgO) forms when the metal magnesium burns in air. (a) If 1.44 g of MgO…
A:
Q: For the following molecules What methods would you use to determine the structures of: 1.solution of…
A: To identify the methods for structure determination of the given compounds.
Q: According to kinetic molecular theory, ideal gas molecules lose energy by colliding with each other…
A:
Q: If the volume of a gas in a closed container at constant temperature is doubled, what will happen to…
A: Boyle's Law :- It states that, for a fixed mass of gas at constant temperature the pressure is…
Q: R = 0.08205 L atm mol-1 K-1 T(K) = T (°C) + 273.15 1 atm = 101,325 Pa = 1.01325 bar For a gas at a…
A:
Q: Quantum numbers arise naturally from the mathematics used to describe the possible states of an…
A:
Q: Which of the following would form an neutral ionic compound with F that has the form XF2 A) X=Na B)…
A:
Q: A 604.7 ng sample of an unknown radioactive substance was placed in storage and its mass measured…
A:
Q: In lab, your spectrophotometer has a maximum detection limit of 1.1 M. The solution you want to…
A: Given: The original concentration of the solution = 3 M The volume of the original solution taken =…
Q: Listen The pH of a solution of 0.04 M HCI is: 4 1.4 0.4 0.04 The pH cannot be determined Question 4…
A: “Since you have asked multiple questions, we will solve the first question for you. If youwant any…
Q: For the following initial and final states shown below in the diagram, a transition occurs involving…
A: When an electron jumps from lower shell to higher shell, then it absorbs energy in the form light.…
Q: 3. Provide the major product(s) for each of the reactions shown below. a. b. H₂SO4 (cat.) H₂O Br₂
A:
Q: The hardness of water (hardness count) is usually expressed in parts per million (by mass) of CaCO3.…
A: Note: " Since you have asked multiple questions, we will solve the first question for you. If you…
Q: What is the chemical name for Na₂HPO4?
A: The compound given is Na2HPO4.
Q: A complete combustion of octane, C8H18, a component of gasoline, proceeds as: CgH18(l) + O2(g)…
A: Recall the reaction, C8H8(l) +O2(g) →CO2(g) + H2O(l) moles of octane=10.1 moles molar mass of carbon…
Q: Chemical Reactions: Give the product/s of each chemical reaction 1. Reaction of this alkene to the…
A:
Gas chromatography questions:
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
- 1. What is the retention time of molecule 9?2. What happens to the peak area if the sample amount is doubled?3. If run time is stopped at 5.5 mins, will molecules 8 & 6 be separated and quantified?4. If the flow rate was doubled, will 8&6 be separated and quantified?5. Does a single peak at time T in the chromatogram indicate only one compound is eluted?3) What is the approximate retention time of benzoate?6. Which statement is true regarding the Rr-value in TLC- Chromatography? a. The more polar the substance the higher is the Revalue b. The Revalue increases as the activity of adsorbant is increased c. The more polar the eluent used the higher will be the Re-value d. Re-value depends only on the structure of the substance e. None of the above
- 6) You are given a mixture of organic compounds suspected of containing various amines (e. g. 4-chloroaniline). What is the best way to quickly separate these amines from the other organic compounds? a) Perform a fractional distillation on the mixture. b) Benchtop silica gel column chromatography. c) Dissolve the mixture in an organic solvent and treat the solution with aqueous HCI. d) Dissolve the mixture in an organic solvent and treat the solution with aqueous NaOH.Which of the following is best to use to separate butanol from the volatile mixture? a. Affinity chromatography Ob. Liquid chromatography Oc. Size exclusion chromatography O d. Gas chromatographyIt appear? 14. After a thin layer chromatography experiment, spots of J, Kand L appeared 10.1, 7.0 and 2.7 cm, respectively, above the starting line. The edge of the solvent was 15.0 cm above the starting line. a. Calculate the Rrof each compound. b. Which compound has the greatest tendency to go into the solvent? Explain how %3B you got your answer. Ho (c) Indicate the REDOX ole of dithionite in the conversion of inc Circle the corect docing aget fon for Intad data below, determine the order of the reactic
- 7. In gas chromatography, increasing the column length leads to analytes, assuming all other parameters are kept constant. a. no effect on b. an increase in C. a decrease in 8. Suppose you are extracting an organic compound from an aqueous solution using retention time for dichloromethane. a. top layer b. bottom layer Once you mix the two layers together, which layer is the organic extract? 6001 9. Which way is best to remove an acidic impurity from an organic liquid that is immiscible with water? a. simple distillation b. wash with aqueous base c. wash with aqueous acid d. recrystallization it in diegolved in a volatileHow could you prepare a sample of pure (S)-naproxen from a sample of racemic naproxen using chromatography?The surface of the silica gel has a structure that looks like this diagram below. Suppose you used a plate coated with silica gel, with propanone, CH3COCH3, as the solvent for thin-layer chromatography. Suppose also that the mixture you were trying to identify contained benzaldehyde benzanilide phenol 1) rank the Rf value from large to small 2) name the IMF between each compound and the silica gel OH OH OH -0-Si-O-Si-O-Si-O- O main body of silica structure
- A neutral compound has a partition coefficient of 7 between ether and water. What percentage of the compound would be extracted from 10 mL of water if: a) 30 mL of ether were used to extract the compound? Answer = (record your answer in decimal notation to 1 decimal) b) 10 mL of ether were used to extract the compound? Answer = (record your answer in decimal notation to 1 decimal)1.Which of the following correlations about the analyses of iodine and saponificationnumbers is/are incorrect?a. Alcoholic KOH: dissolve KOH to lipid sampleb. Hanus reagent: react with saturated lipid bondc. Reflux set-up: hasten reactiond. Blank titration: determine total mol of KOH2. A triacylglycerol (Sample X) was subjected to saponification analysis. 1.1 grams of thesample was refluxed with 5% alcoholic KOH and the refluxed solution was titrated with 17.2 mLof 0.44 M HCl titrant. The blank solution was titrated with 25.6 mL of the titrant.i. What is the saponification number of the sample? ii. Which of the following could be the identity of the sample? Show solutions pls a. Tripalmitin (MW: 807.3)b. Trilaurin (MW: 639.8)c. Triolein (MW: 885:4)d. Tristearin (MW: 891.48)do you think that a dye with a high retention factor is more soluble or less souluble in the solvent than a dye with a lower retention factor? why?