9. A 12 oz can of Coke contains 46 mg of caffeine. One fluid ounce is equivalent to 29.57 mL (1 oz = 29.57 mL). What is the concentration of caffeine in Coke, in units of mg/mL? Show your work.
Q: Using standard heats of formation, calculate the standard enthalpy change for the following…
A: Recall the given equation, 2 SO2 g + O2 g → 2 SO3 gWe have to…
Q: Draw the main organic products of the reaction. Indicate the stereochemistry, including all hydrogen…
A:
Q: B. Supply the missing arrows to complete the reaction mechanisms below. For each of the reactions,…
A:
Q: H₂C H3 नि 11 - енз- CH₂ Cuiven. Structures, give the relationship of geven molecules cas Enantiomery…
A: Here we are required to find the relationship between the given molecule.
Q: 2 HCl(aq) + CaCO3(s) CaCl₂(aq) + CO₂(g) + H₂O(l) If HCI is the excess reactant there will be no HCI…
A: Here given that, 2 HCl(aq) + CaCO3(s) = CaCl2(aq) + CO2(g) + H2O (I) If excess HCl is used then what…
Q: 6. While investigating mole ratios, a group of students collected data for the following chemical…
A: “Since you have asked multiple question, we will solve the first question for you. If youwant any…
Q: Identify the priority number of D
A: Priority Rules for Naming Chiral Centers (R,S System) (1) Prioritize the four atoms/groups of…
Q: (a) (c) (e) F Br H OH CH3 LOCH 3 (b) (d) (f) CI CI NO₂ OH Br NH₂
A: The correct IUPAC name of the above compounds are given below
Q: Why is the equation of rate determining step different from the stoichiometric equation? b) why do…
A: a) when a chemical reaction is given we can never tell the rate unless and until we are familiar…
Q: Which structure represents an optically active aldehyde? H I CH3CH₂-C-OH CH3 H I CH3CH2-C–CHO CH3 ||…
A:
Q: Still having trouble solving for the C13 NMR spectrum. I've included the graph but I don't want the…
A: Here we have to understand the nature of carbon present from 13C NMR spectroscopy.
Q: 2. Determine the oxidation number on the underlined element in each of the following: a Mg(FO3)2 b K…
A: oxidation state, or oxidation number, is the hypothetical charge of an atom, it can be calculated…
Q: . What is the cell potential for this reaction i M. The standard cell potential, Eºcell for the Pb)…
A:
Q: Enter the conjugate acid for ClO−. Express your answer as a chemical formula.
A: Acid and Base: Acid: acids are proton (H+) donor. Base: bases are proton (H+) acceptor. Conjugate…
Q: A 237-g piece of iron, initially at 100.0 °C, is dropped into 244 g of water at 10.0 °C. When the…
A: The amount of heat required to increase the 1oC temperature of 1 g metal is known as the specific…
Q: Data we gather in the experiment Identity of metal Tin MEASUREMENT VALUE Mass of metal, (g)…
A: Specific heat capacity of the metal sample can be measured by calculating the heat gained by water…
Q: A mixture of helium and hydrogen gas is co held constant at 76.0 atm. Calculate the w- or negative)…
A:
Q: OCH3 NO₂ A OCH3 NO₂ OCH3 NO₂ B U Alaz OCH3 NO₂ с า OCH 3 NO₂ D
A:
Q: C. 2. Questions The molecular weight of potassium permanganate is 158 and that of methylene blue is…
A:
Q: Question 32 In the reaction 4A1+302 → 2Al2O3, how many grams of Al2O3 can be produced if 14.55 g of…
A: This question is based on stoichiometry Given reaction is 4Al +3O2 ------> 2Al2O3 It means that 4…
Q: Summary of Steps: Equilibrium reaction: Co(H₂O)²+ +4Cl ⇒ CoCl² + 6H₂O In the virtual lab the colors…
A: Here we have to understand the following equilibrium process [Co(H2O)6]2+ + 4Cl- <=>…
Q: [D] Br CH ₂ 2 HA C 1|||||| CH₂OH B CH3 | с
A: -> For priority of groups we see first of all atoms directly attached with chiral carbon. ->…
Q: 23. Using the x and y coordinates, what will happen if you add solute particles to the boundary…
A: Phase diagram of a compound indicate the change in phase of compound with respect to pressure and…
Q: Use the activity series to predict which of the following reactions will occur. Zn(s) + NiCl₂(aq) →…
A: The activity series describes the reactivity of metals. The metals at the top position in the…
Q: Write the balanced NET ionic equation for the reaction when potassium phosphate and rubidium…
A: Here, we have to write the net ionic equation for the reaction when potassium phosphate and rubidium…
Q: Calculate the enthalpy change that occurs when 3.20 g of SnCl4 (l) reacts with excess H₂O(l) to form…
A: Enthalpy change of a chemical reaction is equal to change in enthalpy for reactants molecules and…
Q: Cevien a reversible reactivist A+B=C+D A+B=C+D for the following equilibruim Constant Ke = [] [] [A]…
A:
Q: A mixture of 8gm of helium and 14gm of nitrogen is enclosed in a vessel of constant volume at 300K.…
A:
Q: A scientist measures the standard enthalpy change for the following reaction to be -896.4 kJ:…
A: Given : a reaction And ∆H° = -896.4 KJ
Q: The following reaction is: (n³-C₂H₂), TaH (n-CşH、)TaH + H
A: Given : reaction I'm which hydrogen gas has released. Here change in oxidation state of metal = +2
Q: Determine the pH of a 0.22M NaF solution at 25°C. The Ka of HF is 3.5•10-5
A: The Ka of HF is 3.5 × 10-5 .We have to calculate the pH of a 0.22 M NaF solution at 25 °C .
Q: Provide an IUPAC name for the structure shown. ball & stick labels (Do not use stereochemical terms…
A: Given, The IUPAC name for the structure is:
Q: Question 14 In the combustion reaction 2C₂H6+702 → 4CO2 + 6H₂O How many moles of O2 will be required…
A:
Q: the following reaction. Na2S2O3 (aq) + Cl₂ (g) + H₂O (1)→ NaHSO4 (aq) + HCI (aq) a) How many moles…
A:
Q: Water gas, a mixture of carbon monoxide and hydrogen, is produced by treating carbon (in the form of…
A: Given : Mass of carbon = 5.35 kg Since , 1 kg = 1000 gm => Mass of carbon = 5350 gm Also,…
Q: # (g) (h) (i) (1) Th 2. H₂O Ol 1. NaBHA 2. H₂O (1) 2 eq CH₂MgBr (2) H₂O 1. CH₂MgBr ► А 2. H₂O MnO₂…
A: DIBAL H reducing agent used to form aldehyde from Ester .
Q: Select all correct statements for the following reaction (there may be more than one answer):…
A:
Q: (a) 4 (b) ल (वा XZ whet Act 4 cu crive the mechanism GIVE HANDURATTEN ANSWER 21 च
A: As pr the guidline of bartleby for the submultipart questions. I can solve only first three question…
Q: Kritik Assignment 3 Question 3. 6 marks total. a) An E2 reaction will occur when the beta hydrogen…
A: I have given the answer in the explanation section. Hope you will understand that.
Q: The value for Kw at 0.0°C is 1.14 x 10^-15. Calculate the pH for a neutral solution at this…
A: pH of a solution is measure of acidity or of basicity of a solution
Q: A 100mL sample of 0.20M HF is titrated with 0.10M KOH. What is the pH of the solution after the…
A: HF is a weak monoprotic acid with Ka = 3.5*10-4 KOH is a strong monoacidic base.
Q: Which of the following saccharides has INCORRECT paired description/s? * D-mannose: Monosaccharide:…
A: Here we have to predict the incorrect statement.
Q: Rank the following from most to least stable: OH A O B, C, A O A, B, C O B, A, C O C, B, A OH в 00…
A: There are three alcohols in the given question. We have to compare the stability of them. Two of…
Q: For both of the TWO dipeptides that can result from the reaction between zwitterions of 1b and…
A:
Q: How much energy as heat is required to raise the temperature of 50.00 mL of water from 25.55 °C to…
A: Given data Initial temperature of water, T1 = 25.55 °C Final temperature of water, T2 = 28.22 °C…
Q: 1/2 N₂(g) + 1/2 O₂(g) → NO(g) kJ/mol-rxn Enthalpy change =
A:
Q: Determine products A to E from the following reactions, some reaction may produce more than one…
A: The starting reactant is a disubstituted benzene having aldehyde, ketone, and alkene group.
Q: Identify the best nucleophile in a substitution reaction at a primary carbon.
A: Given : substitution at primary carbon. Less bulkey and negatively charged nucleophile are best.
Q: An intravenous solution contains 29 mEq/L each of Ca2+ and 02- How many moles of Ca2+ are in 4.6 L…
A: Given concentration of Ca2+ is 29mEq/L Also concentration of O2- is 29mEq/L Volume of the solution…
Q: Test tube KI H₂SO4 H₂O2 Volume / cm³ Na2S2O3 Distilled Total Starch solution water
A: Given table is:
(1 oz = 29.57 mL). What is the concentration of caffeine in Coke, in units of mg/mL? Show
your work.
10. What is an alkaloid?
think would happen if we used it during our simulation?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
- Table of chemicals and reagents with their physicochemical properties (name, molecular formula, molecular weight, pKa, melting point, boiling point, etc.) Write a short outline or a flow diagram of the procedure List and safety issues Read and understand the MSDS information for each chemical used in this practical Experimental procedure Please do not scratch the clear sides of the UV cuvettes as this will invalidate your results. Part 1: Preparation of a calibration curve A calibration curve should be constructed using at least five concentrations of the pure paracetamol standard supplied in the range 3-15 ug/mL as follows: Weigh about 150 mg of paracetamol accurately and transfer to a 200 mL volumetric flask. Add 50 mL of o.1 M NaOH and dilute to about 100 mL with deionised water (DI). Shake and make up to volume with DI water. Dilute 10 mL of the resulting solution to 100 mL (volumetric flask) with DI water (= stock solution). Prepare standard solutions containing 3, 6, 9, 12 and 15…Table 1. Emulsion Formation Emulsion has formed (Yes or No) NO es 1. From the results in Table 1, can you say that the soap is an emulsifying agent, a substance able to cause nonpolar and polar substances to mix? How did you reach your conclusion? Fron Sample Water Water plus oil Water plus oil plus soap Hydrophilic head LAB WORKSHEET- Experiment 11 Ester Hydrolysis and Soap Making Na 0. No. of Layers Cloudy or Clear Clear Clear cloudy 2 2 water is t 2. The products of the saponification reaction you performed were fatty acid sodium salts and glycerol. Shown below is a long chain fatty acid sodium salt. The molecule is amphiphilic because it has a polar end (hydrophilic head) and a nonpolar portion (hydrophobic tail). HO Hydrophobic tail is able a) What part of the molecule interacts with water? Polar bond interacts w/water CH3 b) Which part of the molecule interacts with a nonpolar substance like grease? nonpolar interacts w/ grease 32Extraction of Caffeine Post-lab 1. What group of organic compounds does caffeine belong to? 2. Draw the structure of caffeine as a line formula. Redraw the structure of caffeine,showing all carbon and hydrogen atoms. 3. What is the molecular formula for caffeine? Use the molecular formula of caffeine tocalculate its molecular weight. 4. What does it mean for two solvents to be immiscible? 5. On the report sheet, you calculated your percent recovery of caffeine. a. If your percent was less than 90%, give at least one reason why it was less. b. A group of students have their percent yield more than 100%, give at least one reasonwhy it was more than 100%. Do NOT simply say “human error.” Be specific about the typesof errors (human or otherwise) that may have occurred, leading to a recovery more than eorequal to 100% (Is this possible Why?) 6. Based on what you observed during this experiment, is dichloromethane denser OR lessdense than water? Explain your reasoning. 7. Based on what…
- 10. Which of the below compounds are protic solvents? II II Al N-d-N HO-O H OH HO N. H3C H. Ethanenitrile (Acetonitrile) Ethane-1,2-diol (Ethylene glycol) Hexamethylphosphorotriamide Methanamide (Formamide) Methanol (HMPA) All are protic b. 1,1l and V are protic Il and IIII are protic a. d. 1, IV and V are protic е. All are aprotic C.3. What is the major obstacle that fractional distillation overcomes? 1 1° in422 male distillatioHow much of the suspending agent is needed to prepare a 60-mL preparation of Aluminum hydroxide gel based on this formulation? Ammonium alum 800 g Sodium carbonate 1000g Peppermint Oil 0.01% (0.01 g/100mL) Sodium benzoate 0.1% (0.1 g/100mL) Purified water, qs ad. 2000 mL a. 0.06 g b. 30 g c. 24 g d. 0.006 g
- Pre-lab question #1: The Ksp for BaCO3 is 5.1 x 10-9. How many grams of BaCO3 will dissolve in 1000 mL of water? O 0.028 g 0.014 g None of above 0.007 gwrite an equation for this lab and explain the observations that would occur: measure out 10 mL portion of 10% sodium sulphate into a clean test tube. Add 8 drops of 50% sulphuric acid and swirl. Count the number of drops (swirl after each drop) of 30% calcium chloride needed to produce a precipitate of calcium suplhate.Pre Lab Questions: (Each answer is to be written as a complete sentence) What is the reason for washing the precipitate with water in Step 9? Define precipitate. Define filtrate. In Step 2, what is the purpose for rinsing the stirring rod? read the Procedure to answer the questions Using a balance, mass between 1.50 – 2.00 grams of sodium carbonate in a pre-massed 150mL beaker. Add 20 mL of distilled water and stir thoroughly to make sure all the crystals are dissolved. Rinse the stirring rod with a little distilled water after stirring. Using a balance, mass between 1.50 – 2.00 grams of calcium chloride dihydrate in a pre-massed 50 mL beaker. Repeat Step 2 for the solution in the 50 mL beaker. Pour the calcium chloride solution into the 150mL beaker containing the sodium carbonate solution and stir. Mass a piece of filter paper. Fold the filter paper and place it into the funnel. Wet it with a little distilled water to ensure that it is stuck to the sides of the funnel. Slowly…
- Tom, an analytical chemist, bought a bag of decaffeinated coffee from a grocery store. However,Tom suspected that he might have received regular coffee and therefore decided to analyze hiscoffee for caffeine. In the lab, he took 0.5 mL of the brewed coffee and diluted it in water tomake a 100.0 mL solution. He performed four analyses and found the concentrations to be 4.69,3.99, 4.12, and 4.50 mg/L, respectively. (Assume the density of all solutions is 1.000 g/mL,1oz= 28.35 mL).(a) Report the concentration (in mg/L) of caffeine in the brewed coffee using the format asaverage ± standard deviation. (Note this is not the concentration in the diluted solution.)(b) Look up the caffeine content of regular vs. decaffeinated coffee. Do you think that Tom wasgiven the wrong type of coffee?(c) Caffeine intake of 300 mg per day reportedly has no adverse effects in the vast majority ofthe adult population. If Tom drinks 3 cups (8 oz/cup) of this coffee daily, is his intake withinthis known safe…Multiple Choice Each of the numbered items or incomplete statements is followed by answers or by completions of the statement. Select the one lettered answer or completion that is best in each case. Write your answer before each number. A B 66. The following drugs/substances is assay by direct acidimetry, EXCEPT: C Phosphoric acid C. a. b. Sodium hydroxide Sodium bicarbonate Soda ash d. A B 67.Method used in the assay of ZnO Direct acidimetry C. a. b. Direct alkalimetry Residual acidimetry Residual alkalimetry d. A B 68. Which of the following substance is assayed by residual alkalimetric analysis? a. hydrochloric acid sodium hydroxide C. d. b. zinc oxide aspirin UD ACD с (UD с WStandardization of 0.10 M HCl1. Take three (3) clean and properly labeled 250-mL Erlenmeyer flasks. Into the three flasks, weigh 0.1 g of the primary standard Na2CO3 to the nearest 0.1 mg. Record the weights of the primary standard.2. Add about 75.0 mL of boiled distilled water and swirl to dissolve the solids.3. Add 2 to 3 drops of phenolphthalein indicator. Record the initial burette reading and titrate with the prepared 0.10 M HCl solution until phenolphthalein endpoint.4. Record the final burette reading for each titration in your data sheetDetermination of Ksp and Molar Solubility1. Add Ca(OH)2 to 250.0 mL distilled water with stirring until equilibrium is achieved. 2. Filter the undissolved precipitate. Measure out 50.0 mL of the supernate into a 250-mL Erlenmeyer flask using a pipette.3. Add a few drops of phenolphthalein indicator and titrate with standardized HCl solution until endpoint is achieved.4. Record the volume the HCl solution used. Perform two more trials.…