How is TLC used to determine the purity of a sample?

Q: 6. Using a pKa table, identify the stronger base in each pair of compounds. a) H-C=C: H b)

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Q: 15.67 Predict the acid strengths of the following com- pounds: H₂O, H₂S, and H₂Se.

A: Acidic strengths of the following compounds are as follow. H2Se > H2S > H2O

Q: Identify the following two molecules of each pair as enantiomers, diastereomers or identical. Br ∞-∞…

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Q: 4.85 mol of LiCl in 3.80 L of solution

A: Molarity: It is a unit of concentration. Molarity is defined as number of moles of solute present in…

Q: Boyle observed the change in pressure and volume relationship in a gas. The to the volume of the gas…

A: Boyle's law i.e. a gas  law that states that When the temperature is kept constant,  gas pressure…

Q: Please answer this question as fast as you can please and tahnk you. I will afterwards write an…

A: In the titration we used a primary standard solution to determine the concentration of unknown…

Q: RUCTOR: LAB INVESTIGATION 2 PROPOSAL Before you begin you will need to design an experiment for each…

A: 1. If unknown is BaCl2.2H2O- Molar mass of anhydrous salt = 208.23 g/mol Molar mass of 2H2O =…

Q: For the questions, assume that you start with 0.421 g of copper turnings: Calculate the minimum…

A: Given: 0.421 g of copper turnings Molarity of HNO3 = 16.0 M Molarity of NaOH = 4.00 M  To find :…

Q: At 20°C, the vapor pressure of ethanol is 45 torr and the vapor pressure of methanol is 92 torr.…

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Q: Consider the following data on some weak acids and weak bases: name acetic acid hydrocyanic acid…

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Q: The freezing point of benzene, C6H6, is 5.500 °C at 1 atmosphere. Kf(benzene) = 5.12 °C/m In a…

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Q: Consider the interconversion shown, which occurs in glycolysis. Fructose 6-phosphate glucose…

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Q: 3. Write out all the steps in the mechanism of this electrophilic aromatic substitution reaction.…

A: There are three steps in mechanism of chlorination of benzene.                                   1.…

Q: What is the empirical formula of a compound composed of 29.3 g of potassium (K) and 5.99 g of oxygen…

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Q: Sorry, but how do you get from 5.55 : 11.2 : 1.38 to: 4: 8: 1 That doesn't make sense.  They're…

A: To determine the molecular formula, we need to calculate moles and then mole ratio.

Q: 15.83 Classify the following oxides as acidic, basic, ampho- teric, or neutral: (a) CO₂, (b) K₂O,…

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Q: A solution is prepared at 25 °C that is initially 0.27M in chloroacetic acid (HCH₂CICO₂), a weak…

A: pH of buffer solution is calculated by using Henderson Hesselbalch equation.

Q: For each of the following ions, indicate the noble gas that has the same Lewis structure as the ion.…

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Q: Each value represents a different aqueous solution at 25 °C. Classify each solution as acidic,…

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Q: Why does the vapor pressure of a liquid increase with increasing

A: Vapour pressure is defined as the pressure exerted by the gas molecules on the surface of the liquid…

Q: Please answer this question as fast as you can please and tahnk you. I will afterwards write an…

A: To solve this problem we have to use significant figures rules .

Q: What is the product of the reaction between propanal and Tollens' reagent? A) propane B) propene C)…

A: Given -> Propanal -> CH3CH2CHO  Tollens' reagent is a chemical reagent used to distinguish…

Q: 2. Calculate the average atomic mass of Element Sh. Sh has three isotopes: 39Sh, 40Sh, and 41Sh.…

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Q: Ⓒ Macmillan Learning Three structural isomers have the formula C5H₁2. Draw and name the isomers…

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Q: 3. Write out all the steps in the mechanism of this electrophilic aromatic substitution reaction.…

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Q: - Which of the following is the strongest base? i B is b ΝΗ d NH₂

A: “Since you have asked multiple question, I will solve the first question for you. If you want any…

Q: A chemist adds 0.75 L of a 2.4 mol/L silver nitrate (AgNO3) solution to a reaction flask. Calculate…

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Q: 6. Assume that the equilibrium represented around point (A) in the titration can generically be…

A: The answer to the following question is-

Q: Balance the following equation by adding the appropriate Coefficients. Do not include Physical…

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Q: What is the IUPAC name for the compound shown? ⠀

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Q: What is the mass in grams of 5.39 × 10²⁵ molecules of Br₂?

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Q: Chemistry Write the complete chemical equations for each of the following: a. hydrolysis reaction…

A: In Hydrolysis reaction, the chemicals interact with water, leading to decomposition of both the…

Q: What is the energy of a photon with a frequency of 7.26 * 10¹4 Hz? Enter your answer here

A: Energy (E) = Planck constant (h) * frequency (v). i.e. E = hv

Q: Using this website, draw the conjugate acid for the molecule shown. Copy and paste the SMILES code…

A: Bronsted-Lowry acid-base theory: The Bronsted-Lowry acid-base theory states that the acid is a…

Q: Multiply or divide the following measurements. Be sure each digits. 78.08 cm X 21. cm = 335.49 m…

A: The number of significant figures in case of multiplication and division is determined by the least…

Q: lonic compounds are formed when a metal reacts with a nonmetal. Which two elements combine to form…

A: Ionic compounds are formed between ion. Metals lose electron and form cation while non-metal accept…

Q: Calculate the energy (in Joules) for light with the frequency of 3.1 × 10^4 Hz.

A: Given -> Frequency= 3.1 × 104 Hz (Hz = 1/s)

Q: The temperature of 2.00 mol of an ideal gas increases from 11.0 °C to 45.7 °C as the gas is…

A: For adiabatic process: q=0  We know that, ∆U = q + w  ∆U = w = nCv,m∆T ∆T=Tf - Ti  Tf = Final…

Q: 15.53 Calculate the pH for each of the following solutions: (a) 0.10 M NH3, (b) 0.050 M C-H5N…

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Q: Calculate the mass of forsterite (Mg₂ SiO4) that contains a billion (1.000 × 10³) magnesium atoms.…

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Q: (b) The random error, r', on the result, R, is given by R = 2 + 2 where v', and v, are the random…

A: #(b): #1: Vt = 24.00 mL V't = 26.00 mL  vt = ± 0.01 mL  v't = ± 0.01 mL

Q: Part A It takes 54.0 J to raise the temperature of an 8.70 g piece of unknown metal from 13.0°C to…

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Q: DATA Note: Use the videos as references except when data is provided here. Table 1. Selection of…

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Q: Determine the mass of precipitate that forms when 125 mL of 0.222 M aqueous magnesium chloride is…

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Q: H₂C H₂C. H₂C CH3 CH CH₂ FCH₂ Compound A MM: 136.228 g/mol H₂C CH₂ CH3 Compound B MM: 168.270 g/mol…

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Q: 1. For the formation of 8.0 mol of water, which reaction uses the most nitric acid? (a) 3Cu + 8HNO3…

A: We have given three reaction, we need to compare, which reaction uses more nitric acid (HNO3) to…

Q: a Br OCH, LPd, EN 1)CH₂CH₂MgBr 2) H₂0 1) (CH₂-CH) Culi 2) H₂O

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Q: 3. Select a reagent used in the analysis of Group I that will in one step separate each of the…

A: Cations of Silver, lead and Mercury(I) belongs to I group and cations of Mercury (II) , copper ,…

Q: ral isomers for the molecular formula C₂H, Br. Rings C Draw H Br More Erase

A: We have given a molecular formula and we are asked to draw all the structural isomers of given…

Q: to access important values if needed for this question. The boiling point of ethanol, CH3 CH₂OH, Iis…

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