1. You know that these types of compounds can be analyzed by either GC or HPLC but you are told by your supervisor to use an HPLC for the analysis. What do you think are his reasons for choosing HPLC over GC?
Q: Coven Caluim Chloride Soluleitity 8 0.45g/100m2 of Solution Find the ksp of CaCl₂ ? (il 4.9x10-5…
A: solubility = 0.45 g/100 mL We need to find Ksp. ]
Q: What will be the resulting concentration in mol/L of a SrCl₂ solution if 321 ml of distilled water…
A:
Q: Use this template to help answer the question: *2p E 2p- 2s 1s - П*2p ¹2p | 02p 0*25 02s 0*15 015 2s…
A: We know more is the bond order more is the bond strength and less is the bond length. Bond order=…
Q: and 1. What is the autoionization of water? Give the reaction. Determine the pH, pOH, [H'], and [OH]…
A: As per the guidelines I am allowed to answer first one question at a time. I have solved all for…
Q: The ?a of a monoprotic weak acid is 0.00711. What is the percent ionization of a 0.115 M solution of…
A: Given, The Ka of a monoprotic weak acid = 0.00711 The concentration of the acid = 0.115 M We have to…
Q: What are the structures of the products below? Type the letter labels of your answers. Type NONE if…
A:
Q: Calculate the solubility (in g/L) of CaSO4(s) in 0.450 M Na2SO4(aq) at 25°C. The ?sp of CaSO4 is…
A:
Q: 8. Propose a reasonable mechanism for the reaction shown below. Include all mechanistic…
A:
Q: Check the box under each structure in the table that is an enantiomer of the molecule shown below.…
A:
Q: What can be an isomer of both A and B?
A:
Q: 7.07 LE CHATELIER'S PRINCIPLE 75 kJ Potential Energy 65 kJ 230 kJ d B C Reaction Coordinate D N₂ (g)…
A:
Q: 8. What is the product of the following reaction? A) B) C) D) Br + B Answer Pd[P(C6H5)3]4, OH-
A:
Q: Use the molecular orbital energy diagram below to answer the questions about bond order for the…
A:
Q: Enter a balanced net ionic equation for the reaction Express your answer as a chemical equation…
A:
Q: Which solution, if any, would create the higher osmotic pressure (compared to pure water): one…
A: In the given question two types of solution is prepared. One is 2 g of LiBr prepared in 40 ml water…
Q: Triglycerides are composed of three fatty acids bonded to a glycerol backbone. Explore the…
A: Double bonds present in unsaturated triglycerides can be hydrogenated by reacting with Hydrogen gas…
Q: For the reaction: N2(g) + 2O2(g) + 16.2 kJ ➜ 2 NO2(g) As nitrogen reacts with oxygen, the heat of…
A: Nitrogen dioxide = N2O Heat of formation of N2 = 0 kJ Heat of formation of O2 = 0 kJ If heat is…
Q: When magnesium ribbon is burned inside dry ice slabs (carbon dioxide), black specks (carbon) and…
A:
Q: Write the mechanism for the following aquation reaction:
A:
Q: 31. (8) Provide one reagent that will complete each transf (a) (b) OH -OH ? он ? (c) ∞ -CH₂OH ? 요요 a…
A: You have posted multiple questions but I am solving only first three .if You want solution of…
Q: A volume of 500.0 mL of 0.160 M NaOH is added to 545 mL of 0.250 M weak acid (?a=6.43×10−5). What is…
A:
Q: a) Compound 1 reacts with LICKOR superbase ("BuLi/'BuOK) to provide carbene 2. The reaction of 2…
A:
Q: Bonding A bond arises from "sideways" overlap of two parallel p orbitals. The electron density lies…
A:
Q: T(°C) Log (K) Ink (i) 273 400 0.31 0-7138 FeO(s) + CO(g) = Fe(s) + CO₂(g) 500 0.11 0 3533 600 -0.041…
A: Integrated form of van't Hoff equation is used to determine ΔH° and ΔS° values. ΔG° value is…
Q: How many grams of sodium hydroxide is required to make 250.0 mL of a 0.410 M sodium hydroxide…
A: Given, The molarity of sodium hydroxide ( NaOH) = 0.410 M. The volume of the solution = 250.0 mL.…
Q: What are the coefficients of NH3 and H2O? ___ Al + ___ NO3- + ___ OH- + ___ H2O→ ___ Al(OH)4- + ___…
A:
Q: Use the solubility graph to answer the following question. Which of the listed salts is the most…
A: Solute and solvent makes up the solution. When solute is dissolved in a solvent, a solution is…
Q: A compound is 27.29% carbon by mass and the remainder is oxygen. If the molecular mass of the…
A:
Q: 1. Assign R or S configuration to all chiral centers in the following compounds: CH3 +H -H COOH 1.…
A:
Q: What would be the boiling point of a 9.80 m solution of NaBr an ionic compound that produces two…
A: when a solute is added to a pure solvent the boiling point of sulvent increases. This phenomenon is…
Q: Consider the following diagrams which show the progress for the reaction The equilibrium constant…
A: Equilibrium constant of a reaction is defined as the ratio of concentration of product at numerator…
Q: Qlaced sign in - Search H tab ift ↑ O CHEMICAL REACTIONS Theoretical yield of chemical reactions…
A: Given, The mass of hydrobromic acid ( HBr) = 12.9 g. The mass of sodium hydroxide ( NaOH)) = 11.7…
Q: Ca(OH)2 (aq) + H2SO4 (aq) →→→+ 2 H2O (1) + CaSO4 (aq) (This is LIMITING REACTANT: H₂SO4 is the…
A:
Q: heat [4+2] cycloaddition
A: We have given pericyclic reaction which is carried out under thermal condition. Given reaction is…
Q: MISSED THIS? Read Section 5.7 (Pages 185-191); Watch KCV 5.5, IWE 5.9. Enter balanced complete ionic…
A:
Q: Supply the IUPAC name of the following structure. Type your answer on the blank. COOH H₂N CH₂CH₂CH3…
A:
Q: Consider the reaction below: 2KClO3(s) -2KCl(s) + 30₂(g) Given Molarmass: KClO3 (122.6 g/mol); KCl…
A:
Q: 15 + ε + ¹5 € -15 + 2-²05 BALANCE THE REDOX EQUATION IN ACIDIC SOLUTION
A:
Q: Enter the balanced complete ionic equation for K₂SO4 (aq) + Cal2(aq) → CaSO4(s) + KI(aq). Express…
A: We know that , when a chemical equation is written in the of their ionic form instead of the…
Q: 4 In the prior problem set we used the regular solution model to show that oil and water do not mix…
A: Solution: In this problem we have to calculate ΔSMIX , ΔHMIX
Q: Plants store excess glucose as starch which is composed of amylose and amylopectin. Identify the…
A:
Q: Convert 0.377 g aluminum to moles of aluminum. Group of answer choices 71.6 moles 0.140 moles 28.4…
A:
Q: The change in entropy, Δ?∘rxn, is related to the the change in the number of moles of gas molecules,…
A: Change in number of moles in a reaction is calculated by subtracting the moles of gaseous reactants…
Q: Would this give a high yield of chloroethane?
A: Concept- The reaction of a halogen with an alkane in the presence of ultraviolet light or heat form…
Q: 5. Consider this equilibrium 4HCl(g) + O₂(g) 2H₂O(g) + 2Cl2(g) The equilibrium law expression for…
A: The above questions can be solved as follows
Q: A 0.10 mol/L solution of ammoia, NH3(aq) has a pOH of 2.89 at a certain Determine K₁ for ammonia at…
A:
Q: What mass of K₂SO4 is needed to prepare 500 mL of 0.200 M K₂SO4?
A:
Q: QUESTION 3 You were tasked to determine the percentages of citric acid in the freshly squeezed and…
A: Mass of freshly squeezed lemon juice of 25ml is 25.6 Mass(25ml juice) = 25.6g Percentage ( C6H8O7)=…
Q: Which of the following structures is the trans configuration of 1,2-dimethylcyclohexane with both…
A: Here we have to identify the trans configuration of 1,2- dimethyl cyclohexane with both bonds in…
Q: Show the calculation of the molecular weight of an unknown gas if the rate of effusion of carbon…
A: Here we have used Graham's law of effusion- it states that the rate of effusion of a gas is…
Step by step
Solved in 2 steps
- Why is strict implementation of LQMS (Laboratory Quality Management System) or GLP is necessary ? What are the elements ?A. The Cannabis Gummies were illegally shipped into the country but were intercepted at NAIA upon arrival. You are a chemist at PDEA and you are tasked to analyze Tetrahydrocannabinol (THC) in samples. 5. In preparation for the analyses of other types of samples that may reach your laboratory, the supervisor tasked you to research different extraction procedures for the analyses of Tetrahydrocannabinol (THC) and other related compounds so that you can purchase different extraction instruments. How will you convince him to buy a Supercritical Fluid Extraction Instrument?4. Enumerate the differences between a serological and a volumetric pipette. 5. Enumerate the uses, advantages, and limitations of a glass versus a plastic volumetric pipette.
- 4. A student prepared a compound. The melting point of the crude product was 42 to 48°C. After purifying the solid for the first time, the melting point was 47 to 51°C. After another purification, the melting point was 50 to 53°C. At this stage, can the student confidently say the product has been completely purified? Justify your answer. iedSodium nitrate/nitrite stabilizes the red color, adds flavor, and it also prevents growth of bacteria on processed meats. a. True b. False Every batch of natural Color additives has to be certified: a. True b. False Cochineal red food colorant, E-120 is obtained from small insects: a. True b. False Usage of synthetic colors has been restricted to a maximum limit of 199-200 ppm: a. True b. False The E-numbers are codes for food additives, usually found on food labels, in European Union, and their values for colors are from 100 to 299:.. a. True b. False Gold, Silver and Lead are now added to some food dishes for decoration and health benefits: a. True b. False Report conversion, selectivity, and productivity is one of the main twelve principles of green chemistry. 7 a. False b. True Narcotics are sleep causing drugs. a. True. b. False. 1/2The Ponkan oranges that were imported from one of our neigboring countries are heavily contaminated with pesticides. Upon analysis, some samples do not show any signal for pesticides. You use a Solid-Phase Microextraction (SPME) for the extraction procedure. Explain how SPME works and what are the advantages of using this over liquid-liquid extraction method.
- Which one of the following methods is not usually used for the analysis of synthetic cokorants: a. Electro-chemical methods. b. Spectrometry. c Gravimetric methods. d. Chromatography. Which one of the following is neither a Pesticide nor a herbicide: a Organophosphates b. Diaquatic c Carbamates d. Paraquat Which one of the foilowing is not true about the FDA. a Decides labeling of food colorants on food products. b. Decides the prices of food colorants. C. Decides how much of food colorant to add. d. Decides the type of foods to which color additives are to be added.2. Consider the following example GC Chromatogram from a publication about aggression among Mediterranean Acrobat Ants (C. scutellaris). This particular sample was generated by rinsing hydrocarbons from ant exoskeletons. From the chromatogram, what is the minimum number of unique compunds present in the sample? What data led you to that conclusion? (Don't overthink it) 2 8000000 7000000 6000000 5000000 4000000 3000000 2000000 1000000 Counts (Abundance) 5 19 6 7 0 23.00 24.00 10 | 11 13 17 20 14 15 16 12 teel | 22 19 21 ли 25.00 26.00 27.00 Time "Example of a Gas chromatography-Mass spectrography (GS-MS) chromatogram of hydrocarbon molecules in C. scutellaris" by Filippo Frizzi, et.al, in PLoS One is licensed under CC BY 4.0A3 A student performing the chromophores experiment noticed no pigments on their plate after developing the TLC plate. List 3 possible causes for this outcome and propose solutions for your given answers.
- 1) A polyester made from sebacic acid (CAS# 111-20-6) and 1,6-hexanediol (CAS# 629-11-8) has the molecular weight fractionation listed below. Calculate an appropriate average molecular weight for this polyester. Source: Batzer, H., Macromolecular Chemistry and Physics 5Chemistry Using FTIR to see structure change in quinine after exposing it to light for 2hr seems like quinine degraded. Can it degrade by exposure to UV light for hours? What source of errors could have happened? I know that maybe I used small concentration.B. There was big news all over the internet that the Ponkan oranges that were imported from one of our neighboring counties are heavily contaminated with pesticides. Your lab was asked to analyze these samples using a gas chromatographic procedure. 7. Some samples do not show any signal for the pesticides, your boss told you to use a Solid-Phase Microextraction (SPME) for the extraction procedure. Explain how SPME works and what are the advantages of using this over the liquid-liquid extraction method.