(2) Adenine has a molar absorbance of 4 13.1 M-1cm-1 for 263 nm nucleic acid. What is the molar concentration of an acid solution that shows a permeability of 75% when 2 ml of it is placed in an absorption cell with a thickness of 1 cm?
Q: Write the reaction for the oxidation of ascorbic acid catalyzed by ascorbic acid oxidase.
A: The overall oxidation of ascorbic acid typically involves the transfer of two electrons and two…
Q: The freezing point of a substance is the temperature at which the solid and liquid forms can coexist…
A: Depression in freezing point or elevation in boiling point are example of colligative property Here…
Q: Write the pressure equilibrium constant expression for this reaction. Ti(s)+2 Cl,(g)→TICL,(1)
A:
Q: A sample of Al;(SO.); weighing 7.52-g was dissolved in enough water and diluted to 250.0-mL.…
A: Given: Mass of sample = 7.52 g. The sample is diluted to 250 mL. Volume of diluted sample used =…
Q: What is the [H3O] in a solution 1.50x10-4M Ca(OH)2?
A: Ca(OH)2 -----> Ca+2 + 2OH- [Ca(OH)2] = 1.50x10-4 M
Q: Why do halonium and mercurinium ions follow Markovnikov addition when attacked by weak nucleophiles?…
A: When the hydration reaction of alkene occurs in presence of mercuric acetate and after the reduction…
Q: Why is the nucleophilic attack on halonium and mercurinium ions "SN2-like" and not simply SN2? Weak…
A:
Q: for each of the following reactions. Give all the steps of the mechanism and use curved arrows to…
A: We have to complete give all the steps of the mechanism and use curved arrows to clearly indicate…
Q: fön in a 25.00-mL sample was converted to dicyanoargentate (l) ion by the addition of a xcess…
A:
Q: A sample of hydrogen gas produced in a laboratory experiment had a volume of 280. mL at a pressure…
A:
Q: what is the density of g/L of helium gas at 200 C and 33.90 torr
A:
Q: Arrange the freezing points of the following aqueous solutions from highest to lowest: 0.25 m…
A:
Q: If the same mass of metal was used in the experiment, how would the volume of hydrogen gas produced…
A: Given ; both metals have equal mass used in experiment
Q: calculate the % yield based on purified moclobemide assuming 4-(2-aminoehtyl)morpholine limiting…
A: Given: volume of 4-(2-aminoehtyl)morpholine = 1.5mL mass of purified moclobemide = 0.73g density of…
Q: At a certain temperature, the equnbrum constant K for the following reaction is 1.2 Use thes…
A:
Q: What is the final concentration of nitrate ion What is the final concentration of sodium ion
A: To calculate final concentration of ion, we would first their moles and using total volume of water…
Q: What mass of KBr(s) would you add to make 100.00 map of 2.00 M KBr(aq) solution?
A: Given-> Volume = 100.00 ml = 0.100 L (1L = 1000 ml) Molarity = 2.00 M I think there is 100.00 ml…
Q: 4. Suppose 5 mL of 1.5 M ethylene diamine is added to 50 mL of 0.15 M Ni solution in an identical…
A: Given: Concentration of ethylene diamine i.e. en = 1.5 M Volume of en solution taken = 5 mL = 0.005…
Q: 120- 90 60 30 Time (minutes) 90 What is the melting point of the following substances? Temperature…
A: The given plot is a phase transition curve of any sunstance which involve all the tree phases i.e,…
Q: 1. A substance that shows the endpoint of titration 2. Type of error in which the volume delivered…
A: The questions are related to the titration and are solved in the following step.
Q: Compared with a solution that has a pH of 6.0, a solution that has a pH of 3.0 contains a) twice as…
A: Given-> pH of solution -1 = 6.0 pH of solution -2 = 3.0
Q: SN1 reactions are better performed in protic solvents. Explain why the researchers could not perform…
A: In SN1 reaction, alky halide/sulphonate react with a weak nucleophile. In first step of reaction…
Q: Calculate the partial pressure of propane in a mixture that contains equal weights of propane (C3H8)…
A: The mole fraction of a component in the mixture is defined by the ratio of moles of that substance…
Q: In the experimentation where we oxidize cyclohexanol with bleach (NaOCl). Why is it necessary to…
A: Because they are strong oxidizing agents, bleaches such as chlorine and sodium hypochlorite are able…
Q: Part 4 Incorrect. Refer to equation 3-11 and remember the ideal gas law. If 1.00 mole of NI3(s)…
A: Recall the reaction that will occur here NI3s →12N2g + 32I2g Here 1.00 mole of NI3 (s) is…
Q: sa particle.
A:
Q: 4. Sodium hydroxide solution was standardized against one gram of potassium acid phthalate. First…
A: Given: 1 g of KHP is reacting. Volume of NaOH solution used in trial 1 = 52.0 mL = 0.052 L…
Q: 2 HAHB Two water molecules are separated by 2.72 Å in air. Use the equation V = - to calculate the…
A:
Q: draw the major product formed from nitration of the following compound
A:
Q: We must first calculate the mass defect (Am) for 5oFe. Since atomic masses (which include the…
A: Mass defect is the difference between the original atomic mass and the total mass of neutrons and…
Q: 8. Is the following statement True or False: A dry cell has no water in it.
A: A standard dry cell battery consists of a zinc anode , a carbon cathode within a central rod
Q: In pure water, what are the concentrations of H+ and OH- ions?
A: Given; ions
Q: Click the "draw structure" button to launch the drawing utility. Vhat is the major monobromination…
A:
Q: Consider the following data for chromium: atomic mass 51.996gmol electronegativity 1.66 electron…
A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…
Q: 10.0 g sample of water at 20.0 °C is added to a 50.0 g sample of water at 70.0 °C. What is the final…
A: Given : We have to calculate the final temperature of water.
Q: Spilling the bottle of H2O2 (hydrogen peroxide) on a lab table would increase the rate of reaction:…
A: Le Chatelier's Principle : If a system is subjected to stress then the system will try to counteract…
Q: Avogrado's law can be expressed as? a. V1P1 = V2P2 b. P a T c. V a n d. P/T ak
A: According to Avogadro's law under same condition of temperature and pressure, same volume of…
Q: •Example: A 0.040 M solution of an acid, HA, has a pH of 3.02 at 25 °C. What is the pK, for this…
A: Given that, Concentration of acid, HA (C) = 0.040 M pH of acid = 3.02 We need to find the pKa…
Q: 1. Determine the structure of the compound with a molecular formula of CAH5CI. The molecule is…
A: IR spectroscopy is an important tool for the determination of the functional group in the compound.…
Q: A generic salt, AB, has a molar mass of 215 g/mol and a solubility of 1.30 g/L at 25 °C. AB(s) =…
A:
Q: 5. Rank the compounds by rate of reactivity with a mixture of Cl, and AICI. The most reactive…
A: We have to predict the order of reactivity.
Q: Starting with benzene synthesize the following compound. O2N. -COOH
A: Detail synthetic scheme is shown below
Q: It describes the closeness agreement between the average of a large number of results and a true or…
A: Given: It describes the closeness agreement between the average of a large number of results and a…
Q: Part A: Find the value of the specific rate constant, k, for the data shown in the graphs in…
A: The graphs given are,
Q: What types of covalent bonds are necessary for an intermolecular hydrogen bond to form?
A: Hydrogen bonding are not a permanent bond, its form due to electrostatic attraction between two…
Q: At 25 °C, an aqueous solution has an equilibrium concentration of 0.00425 M for a generic cation,…
A:
Q: Draw or look up the molecule to determine the classification from the stiudule Alcohol…
A:
Q: Calculate ∆H for the reaction CH4(g) + ½ O2(g) → CO(g) + 2 H2(g) given the following data:…
A: Given Equation-- CH4+1/2O2->CO + 2H2
Q: molecular speed from low (1) to high (4). All gases are at the same temperature. O2 (g) Ar…
A: Organize the following gases in order of molecular speed from low (1) to high (4). All gases are at…
Q: NH, cat H он OH cat. H,SO, 2) H,O* 1) LAH 2) H,0
A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Step by step
Solved in 2 steps
- (2) Adenine has a molar absorbance of 4 13.1 M-1cm-1 for 263 nm nucleic acid. What is the molar concentration of an acid solution that shows a permeability of 75% when 2 ml of it is placed in an absorption cell with a thickness of 1 cm?3.) The accuracy of a spectrophotometer is evaluated by preparing a solution of 60.06 ppm K2Cr2O7 and measuring its absorbance at a wavelength of 350 nm in a cell with a pathlength of 1.00 cm. The expected absorbance is 0.640. What is the expected molar absorptivity of K2Cr2O7 at this wavelength?(a) You measure the percent transmittance of a solution containing chromophore X at 400nm in a 1-cm path length cuvette and find it to be 50%. What is the absorbance of this solution? (b) What is the molar absorptivity of chromophore X if the concentration of X in the solution measured in question (a) is 0.5mM? (c) What is the concentration range of chromophore X that can be assayed if, when using a sample cell of path length 1, you are required to keep the aborbance between 0.2 and 0.8?
- A specific steroid has a λmax of 249 nm and a molar absorptivity ε of 11,500 L mol−1 cm–1. What is the concentration of the compound in a solution whose absorbance at 249 nm is A = 0.050 with a sample pathlength of 1.00 cm?A 10 cm 3 air saturated Fricke dosimetry solution in a 1 cm diameter tube is irradiated for 10 min in a 6~ source of gamma rays. The optical density measured at 304 txm in a 1 cm light path at 30~ was 0.260 after the completion of irradiation and 0.003 before irradiation. (a) What is the total dose in gray absorbed by the solution?(b) If 10 cm 3 of methanol is irradiated in the same tube for the same 10min, what is the absorbed dose in gray. The Z/A for methanol is 0.562 and that for the Fricke dosimeter is 0.553. Explain any assumption you make to solve the problem.A specific steroid has a max of 254 nm and a molar absorptivity & of 11, 500 L mol-¹ cm-¹. What is the concentration of the compound in a solution whose absorbance at 254 nm is A = 0.085 with a sample pathlength of 1.00 cm?
- Exactly 5.00 mL aliquots of a solution containing analyte X were transferred into 50.00-mL volumetric flasks and the pH of the solution is adjusted to 9.0. The following volumes of a standard solution containing 2.00 µg/mL of X were then added into each flask and the mixture was diluted to volume: 0.000, 0.500, 1.00, 1.50 and 2.00 mL. The fluorescence of each of these solutions was measured with a fluorometer, and the following values were obtained: 3.26, 4.80, 6.42, 8.02 and 9.56, respectively. ii. Using relevant functions in Excel, derive a least-squares equation for the data, and use the parameters of this equation to find the concentration of the phenobarbital in the unknown solution.in the determination of Keq in spectrophotometry, why is it that [KSCN] is lower in the preparation of unknown solutions.Using the Beer-Lambert's Law, calculate the concentration of the riboflavin with an absorbance of 0.800 at 450 nm, a 1.000 cm optical path length and a molar extinction coefficient of 14,000 M-1 cm-1. Conc. of riboflavin = M. 3 sig. figures
- Why do not all proteins have the same absorption coefficient (ɛ) at 280 nm? Pick one: a.lt is mainly due to the presence of Asp, Glu, Asn, Gln, Arg and His in the protein b.lt is mainly due to the presence of phenylalanine in the protein c.It is mainly due to the presence of tryptophans and tyrosines in the protein d.The statement is incorrect; all proteins have the same (E) at 280 nm50 uL of an aqueous sample of double-stranded DNA is dissolved in 950uL of water. This diluted solution has a maximal absorbance of 0.326 at 260 nm. What isthe concentration of the original (more concentrated) DNA sample, expressed in ug/ul? I would like to know the process of this question. And I was wandering as well if the total diluted volume would be 950ul + 50ul = 2000ulYou obtained the following raw data when setting up a Biuret standard curve: Absorbancy 540nm BSA (mg/ml) 0.158 1 0.210 2 0.260 3 0.305 4 0.360 0.410 0.455 7 0.510 8 0.530 9 0.550 10 0.554 After blanking against a biuret-dH20 sample, the protein concentration of an unknown sample was determined using the same method and an absorbancy of 0.279 was obtained. Set up a standard curve, excluding outliers (experimental and statistical) and determine the protein concentration in the unknown sample in mg / ml (up to 3 significant figures).