A solution containing 5ppm KMNO4(F.W.159) has a transmittance of 0.360 measured in 1 cm cell at 500 nm. The molar absorptivity of KMNO4 in L mole1 cm 1 is:

Q: The gas phase reaction A + B-→C has a reaction rate which is experimentally observed to follow the r...

A: Given- A+B->C  Rate=K[A]^2[B]  

Q: Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product ...

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Q: 1. Balance the following Redox Reactions. Always include the state of each species: (s), (1), (g), o...

A: Balanced the following redox reaction under tge given respective medium ---

Q: Consider the following decomposition reaction: 2SO3(g) = 2SO2(g) + O2(g) When 12.0 mol of SO3 is pla...

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Q: Which is NOT true of keto-enol tautomerism? Select the correct response: Rapid interconversion. The ...

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Q: You have a 0.500L buffer with [HCIO] = 0.184 M and [NaClO] = 0.541 M. What is the pH after the addit...

A: Volume=0.500L  [HClO]=0.184M [NaClO]=0.541M  Moles of HCl =0.024 mol pKa = 7.54      

Q: When is a crystalline precipitate more likely to form? High relative supersaturation ...

A: Supersaturation is non equlibrium state on which solution contains more solute than normal equlibriu...

Q: When rubidium metal is exposed to air, two atoms of rubidium, Rb, combine with one atom of oxygen. I...

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Q: A 521-mLmL sample of unknown HClHCl solution reacts completely with Na2CO3Na2CO3 to form 13.1 gg CO2...

A: Given :-  Mass of CO2 = 13.1 g  Volume of HCl solution = 521 mL  To calculate :-  Concentration of H...

Q: A sample is analyzed for chloride using the Volhard method. What is the percentage chloride as NaCl ...

A: Given, Weight of sample: 303.0 mg AgNO3 used: 40.00 mL of 0.1234 M KSCN used: 12.20 mL of 0.0930 M M...

Q: 2. You are given 10.00 ml of a solution of unknown acid. The pH of this solution is exactly 5.83. Yo...

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Q: Draw the Bohr-Rutherford Diagram of ammonia, NH₃.

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Q: Consider the rate law. rate = k[A]* Determine the value of x if the rate doubles when [A] is doubled...

A: Given  Rate (R) = k[A]x When [A] doubled  2R = k[2A]x 2R = 2xk[A]x 2R=2xR 2x = 21 So, x=1

Q: Which of the following is NOT a conjugate acid-base pair? A) H2SO4/SO42- 2) B) H2O/OH- C) NH4*/NH3 D...

A: An acid is a proton donor whereas a base is a proton acceptor.  An acid after losing a proton turns ...

Q: or the following compounds, decide whether the compound's solubility in aqueous solution changes wit...

A: 1. PbCl2 -------> Pb+2 + 2Cl-    Pb+2 + 2OH- <=======> Pb(OH)2 Not likely to react with pH,...

Q: Is Carbon 2 an R or S enantiomer?

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Q: Suppose that 1.07 moles of A at 3.21 atm and 298.15 K and 8.02 moles of B at 4.30 atm and 298.15 K a...

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Q: What mass in grams of NaCl would need to be added to 5201 g of water to increase the boiling tempera...

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Q: The reaction A -C was performed and the concentration vs. time data below collected. time, s 1 2 3 4...

A: A question based on kinetics of reactions in solution that is to be accomplished.

Q: The molecule below contains 2 chiral centers. HO NH2 HO Select one: O True False

A: Chiral center - An atom especially in an organic molecule that has four unique atoms or groups attac...

Q: Mydration of 2-butene is regioselective Select the correct response: True False

A: alkene undergo addition reaction in acidic condition to form alcohol Here we are required to show wh...

Q: Predict the product and balance the redox reaction  Solid cuprous sulfide is oxidized by hot concen...

A: When cuprous sulfide reacts with hot nitric acid, products will be cupric nitrate, nitrogen dioxide,...

Q: 25.0 mL sample of 0.100 M CH3COOH(aq) is titrated with 0.100 M NaOH(aq) solution. What is the pH aft...

A: Given-> Volume of CH3COOH= 25.0 ml Molarity of CH3COOH = 0.100M Molarity of NaOH = 0.100M Volume ...

Q: Which of the following reactions is a rapid laboratory test for unsaturation of a compound using bro...

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Q: Select one or more answers and submit. For keyboard navigation... SHOW MORE V a A C=O bond is longer...

A: Given,  Predict the correct statements 

Q: Blood Glucose Determination A nurse caring for a patient with diabetes performed a fingerstick gluco...

A: A nurse caring for patients with diabetes performed a fingerstick glucose test on the Accu-Chek gluc...

Q: Explain your litmus test results in part A when the sodium and potassium reacted in water.   part ...

A:     Red litmus paper is red in acid solution but turns into blue in an alkaline solution. Blue litmu...

Q: If you do not heat your crucible strongly enough to remove all volatile impurities when you heat the...

A: The loss of water happening during the inital heating or during the second heating is not relevant.

Q: Which of the following is produced by hydroxylation of an alkene? Select the correct response: haloa...

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Q: adding 2.302 g of solid NaOH to 800 mL of o.200 M HNO, (K_ = 7.2x104). a pH =

A: Answer: Reaction between NaOH and HNO2 will take place as shown below: HNO2(aq)+NaOH(aq)→NaNO2(aq)+H...

Q: A 47.4g sample of a metal was heated to 94oC then quickly transferred to an insulated container cont...

A: Answer: This question is based on energy conservation. When metal will be put into the water, energy...

Q: 11. To prepare for her college entrance exam, Jiheon is studying stoichiometry and tries to calculat...

A: Recall the given reaction  Cu2S (s) + O2(g) ---> Cu2O (s) + SO2(g) Here we have to calculate mass...

Q: Answer the following questions and show all calculations: a. Explain what a dilution factor is, in y...

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Q: In a particular CCC test, 8.0 mL of 1.0 M Mg(NO3)2 was added to 8.0 mL of ultrapure water and 4.0 mL...

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Q: In the ammonia (NH) molecule of the figure, the three hydrogen (H) atoms form an equilateral triangl...

A: You can find the center of mass of the 3 Hs first, then find the center of mass between that point a...

Q: Which reaction has a carbocation intermediate? Select the correct response: Hydrogenation Hydrohalog...

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Q: Anna Divi, a young and ambitious researcher, is planning to put up her very own research laboratory....

A: Given: Break temperature = melting point = 54 oC Halt temperature = freezing point = 51 oC

Q: The reaction described by the equation 0,(g)+NO(g) → 0,(g) + NO,(g) has, at 310 K, the rate law rate...

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Q: The compressibility factor for methane is given by Z = 1 + BP + CP2 + DP³. If P is in atm, the value...

A: Given:  

Q: Determine if aqueous solutions of these salts are acidic, basic, or neutral. a) K2CO3 b) CaCl2 c) KH...

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Q: connected by an a, B-1,2-glycosidic bond. Explain why sucrose is both a and B at the same time. 4. S...

A: In polysaccharides, the monosaccharide units are joined together by the glycosidic bonds. The glycos...

Q: Part A Consider the following unbalanced redox reaction. MnOq (aq) + Zn (s) → Mn²+(aq) + Zn²+(ag) Ba...

A: Part. A :-  Given reaction is :  α MnO4- (aq) + βH+ (aq) + γZn (s) ----> δMn2+ (aq) + εH2O (l) + ...

Q: A certain reaction has a relatively constant standard enthalpy of reaction of 36.2 kJ/mol between th...

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Q: Consider the reaction 2 H, + O, 2 H,0 = -484 kJ Which answer best describes the transfer of heat tha...

A: given H = -484 KJ ( heat released) for 2mol H2 2mol H2  = 484 KJ 1.70 mol H2 = ?

Q: 4. How many moles of FeCl3 are produced from 2.3 grams of Fe? MW: Fe = 55.945g/mol, FeCl3 = 162.2g/m...

A: Iron reacts with chlorine to form iron(III) chloride. The equation for the balanced chemical reactio...

Q: Experiment data: (Imagine you obtain the data below) Sample ICP-AES signal Note 1000 ppb Fe solution...

A: Given data:

Q: An analytical chemist is titrating 225.3 mL of a 1.100M solution of formic acid (H,CO,) with a 1.200...

A: MH2CO2 = 1.100 M  VH2CO2 = 225.3 mL = 0.2253 L MKOH = 1.200 M VKOH = 99.62 mL = 0.09962 L pKa = 3.74

Q: unknown sample contains radioactive element U-235. If the original amount present is 3500 atoms, how...

A: Given- Number of initial atom =3500 atoms Number of final atom =125 atoms  Half life =700 million ye...

Q: 5. How many grams of water are produced from 2.5mol of oxygen? ( H2 + O2-> H2O SKR. 2.8 g RKS. 23 g ...

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Q: If metal X is lower than metal Y in the activity series, then metal X replaces ions of metal Y in a ...

A: In activity series metals are arranged by their reactivity from highest to lowest.  Given is metal X...

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.