Q: Use the observation in the first column to answer the question in the second column. observation que...
A: The correct answer is given below
Q: Evaluate A S for the reaction below at 25 °C. CH 4(g) + 2CI 2(g) CCI 4 (e) + 2H 2(g) -135.4 -74.81 A...
A: CH4(g) + 2Cl2(g) --> CCl4(l) + 2H2(g) ∆H°f (CH4) = -74.81 KJ/mole ∆H°f(CCl4) = -135.4KJ/mole ∆G°f...
Q: Dr. Albert Apale, a well known Chemist, tested Random samples in the laboratory. The compounds were ...
A: Compounds are classified as : Ionic Saturated with 6 carbon molecules Unsaturated with 6 carbon mo...
Q: Calculate the pH of a 7.51 M solution of HBrO. The K, of HBRO is 2.50 x 10.
A: pH = -log[H+] Ka for an acid is the ratio of product of concentration of products raised to their ...
Q: Question 3 As the temperature of a reaction is increased, the rate of the reaction increases because...
A: As the temperature of a reaction increases, the rate of the reaction increases because the ......?.....
Q: Given the following data, determine the order of the reaction with respect to NO] and the overall re...
A:
Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 281.0 mg sample...
A:
Q: 6.A fuel is burned with 50% excess air and the combustion characteristics of the fuel oil are simila...
A:
Q: C4 H,0 8 4. 3. PM-00-190 ppm 00
A:
Q: .. Suppose you wanted to further purify the acidic or basic component of your mixture. What might be...
A:
Q: N°H HO -HN
A: We have to write the reaction if occurred.
Q: Nitric acid and nitrogen monoxide react to form nitrogen dioxide and water, like this: 2 HNO3(aq)+NO...
A: KC is equilibrium constant
Q: How much 0.5 M KOH must be added to 200 mL of 50 mM glycine at ph 8.6 to bring its ph to exactly 10....
A: Answer: Glycine is an amino that act as an buffer between the range of 8.6 to 10.6, therefore the pH...
Q: place coefficients in the middle of a chemical formula. 1. Na + MgF2 > NaF + Mg 2. Mg + HCI → MgCl2 ...
A: Since you have posted a question with multiple sub-parts,we will solve first three sub-parts for you...
Q: Theoretical yield of chemical reactions Aqueous hydrobromic acid (HBr) reacts with solid sodium hydr...
A:
Q: nder certain conditions the rate of this reaction is zero order in ammonia with a rate constant of 0...
A: Given reaction is followed zero ordered reaction
Q: If 3830 J of heat is added to a calorimeter containing 75.40 g of water, the temperature of the wate...
A:
Q: One solution contains 44% alcohol, and another solution contains 81% alcohol. How many liters of 81%...
A: Given One solution contains 44% alcohol, and another solution contains 81% alcohol. We need to find...
Q: A gas made up of atoms escapes through a pinhole 0.799 times as fast as Kr gas. Write the chemical f...
A: Given data, Molar mass of Kr =83.798 g mol-1 Rate of Kr = r Rate of unknown = 0.799 r Molar mass an...
Q: Titanium and chlorine react to form titanium(IV) chloride, like this: Ti(s)+2 Cl,(g)→TİCL,(1) At a c...
A:
Q: Compare the following two elements, identified by their electron configurations: A- [He]2s 22p 5 B- ...
A: Electrons are filled in a different atomic orbital in an atom. According to the Aufbau rule, the ele...
Q: NaH H,SO4 (A) -OH (G) + ethyl chloride -OH (H) 180° K,Cr,0,, H,SO, (B) OH (1) + (J) •Product Set 1 (...
A:
Q: 2. Which of the following structural formulas represent identical compounds and which represent cons...
A: for the given structures, we need to identify the structures that are identical and the structures t...
Q: How much 0.5 M KOH must be added to 200 mL of 50 mM glycine at ph 8.6 to bring its ph to exactly 10....
A: Henderson equation of buffer pH = pka + log salt/ acid
Q: 7. Fill in the boxes below Tutors - conceptual help only! (a) 1. NAOE: 2. CILBr 3. NaOEt 4. EtO OEt ...
A:
Q: 2. Complete the following chemical equation below. Provide the reagent that will separate each pair ...
A: The group reagent of 3 rd group is ammonium sulphide solution or hydrogen sulphide gas in the presen...
Q: Calculate the standard enthalpy of formation of phenol, C 6H50H, at 298.15 K given that, at this tem...
A: Change of enthalpy of reaction is difference between total enthalpy of products and total enthalpy o...
Q: A charge of 7.15 mC is placed at each corner of a square 0.450 m on a side. Part A Determine the mag...
A: Apply Coulomb's law, F = Kq1q2/ r2
Q: Net Ionic Equation (for positive test result) Test Reagent Observations 2+ 0. 10 M K¸FE(CN), 3+ Fe 0...
A: Test Reagent Ion: Fe2+ Reagent: 0.10 M K3Fe(CN)6 Observation: A blue precipitate is formed Net Ion...
Q: Dehydration of the alcohol
A:
Q: Why should you know the composition of the weighing form? So that it can be filtered properly ...
A: Please find your solution below : Gravimetry is a method used for the quantitative determination of ...
Q: A 7.50 g of solid compound RED was dissolved in 100 g water. The freezing point of the solution was ...
A:
Q: Which of the following will lower the activation energy for a reaction? O increasing the concentrati...
A: In a given chemical reaction, the minimum amount of energy required by the reactant molecules to att...
Q: A system is compressed from 250 L to 5.0 L at a constant pressure of 10.0 atm. What is the amount of...
A: Consider the given information is as follows; Initial volume V1 = 250 LFinal volume V2 = 5.0 LPressu...
Q: Problem no. 23-25 en the following data for the NH4* + NO2" – N2 + 2H20 reaction Trial Rate [NO2] 0....
A: K is rate constant
Q: Carbon dioxide and water react to form methanol and oxygen, like this: 2 CO2(g)+4 H,O(g)→2CH;OH(1)+3...
A:
Q: Dissociation of the following equation in water (equation should be balanced and with state symbols)...
A:
Q: MeO2C, NaOMe MeO,C CO,Me HTOME OMe NaH Meo, OMe OMe OMe NH2 NH,OAc NaCl, DMF H+ -OMe NaBH;CN H2O, A ...
A:
Q: 10.0 M NH3 pH: [H30+]: [OH-]: pOH:
A:
Q: Spectrophotometric of a Cobalt Chloride Solution Analysis 1. explain in detail the results o...
A: The wavelength at which maximum absorbance of a compound is obtained is known as lambda max. And as ...
Q: Combustion of hydrocarbons such as pentane (C,H12) produces carbon dioxide, a "greenhouse gas." Gree...
A:
Q: Give the structures of two different alkyl bromides both of which yield the indicated alkene as the ...
A: Given : structure of products.
Q: Sodium phosphate is added to a solution that contains 0.0047 M aluminum nitrate and 0.016 M calcium ...
A:
Q: A compound decomposes by a first-order process. If 13% of the compound decomposes in 60 minutes, the...
A: Given values- Time = 60 minutes Decomposition = 13%
Q: Density of Mole fraction of Molarity Molality % by Mass ppm solution solute
A:
Q: 36) Apure substance be oparated into two difs.
A: Given : a pure substance.
Q: MULTIPLE CHOICE: Write the letter of the correct answer. Write E if the answer is not found within t...
A: let us discuss step by step solution.
Q: Under certain conditions the rate of this reaction is zero order in ammonia with a rate constant of ...
A: Given, 2NH3(g) ➝ N2(g) + 3 H2(g) Reaction is a zero order reaction. Rate constant (k) = 0.0091 M.s-1...
Q: Calculate the pH of a 7.51 M solution of HBrO. The K, of HBRO is 2.50 x 10. Express your answer usin...
A: Since HBr is a weak acid, we have to plot ICE chart to find [H+(aq)] and pH. Given the molarity of H...
Q: use the attached NMR spectrum to generate the structural formula of the compound .Unknown NMR # 8 wa...
A: H1-NMR analysis of methyl ketone:
1
Step by step
Solved in 2 steps with 2 images
- what is the relationship between absorbance and transmittance?The percent transmission, % T, is defined as follows. percent transmission = х 100% 1, = intensity of the light entering the sample | intensity of the light leaving the sample sample If the sample absorbs no light, I = lo, the percent transmittance will be equal to 100%. If the sample absorbs the light completely, I = 0, the percent transmittance will be equal to 0. Thus, the greater the amount of light absorbed by the sample, the smaller the percent transmittance. You are given the following solutions, E will have the lowest %T and A will have the lowest absorbance. The lambda max for these solution should be around 620 nm. А В D E(d) The Beer-Lambert law states that the absorbance (A) of light by a solution in a cuvette is given by: 10 A = In == ECL where lo is the incident light intensity, is the transmitted light intensity, e is the molar absorptivity, c is the concentration of the solution, and L is the path length of the cuvette. (1) Light with a wavelength of 800 nm is passed through a cuvette containing a solution of Coumarin dye. After passing through the cuvette, the light intensity was reduced to 10% of its initial value. What is the absorbance of the solution of Coumarin dye? (ii) The concentration of the Coumarin dye is 0.004 mol dm3, and the cuvette has a path length of 1 cm. What is the molar absorptivity of Coumarin dye at 800 nm, in units of m² mot¹? (IT) The molar absorptivity of Coumarin dye at 400 nm is three times larger than at 800 nm. How would the absorbance of the solution change, when measured with 400 nm light rather than 800 nm light?
- 1.4 A 6.25 x 10-³ M solution of potassium permanganate (KMnO4) has a transmittance of 47.4% when measured in a 1.5 cm cell at a wavelength of 625 nm. (a) Calculate the absorbance of the KMnO4 solution (b) Calculate the molar absorptivity of KMnO4Be sure to answer all parts. Covalent bonds in a molecule absorb radiation in the IR region and vibrate at characteristic frequencies. (a) A molecular vibration absorbs radiation of wavelength 28.3 um. What frequency (in s) corresponds to that wavelength? Enter your answer in scientific notation. x 10 (b) A molecular vibration has a frequency of vibration of 7.574 x 10" Hz. What wavelength (in um) corresponds to that frequency? umA student creates a sports drink by dissolving 5.0 g of powder in 250 mL of water. The green colour of the drink is due to the presence Green Dye X, which has a lambdamax of 630 nm. A calibration curve (absorbance versus concentration) at lambdamax is created for varying concentrations (mM) of Green Dye X which has the equation y = 26.8x. If 1.0 mL of the sports drink is diluted to 10. mL with water, then the absorbance is measured to be 0.340, what is the mass percent of Green Dye X in the drink powder if the molecular weight is 418.4 g mol-1?
- You measure that the %T of a sample at 450 nm is 11%. What is the absorbance of this sample?You measure that the %T of a sample at 850 nm is 20%. What is the absorbance of this sample? Report your answer to three decimal places.A student is testing a different concentration of Cu(SO4)2, but finds that his absorbance readings are too high for the instrument. What steps can he take to measure the absorbance accurately?
- A swimmer enters a gloomier world (in one sense) on diving to greater depths. Given that the mean molar absorption coefficient of sea water in the visible region is 6.2 × 10−5 dm3 mol−1 cm−1, calculate the depth at which a diver will experience (i) half the surface intensity of light, (ii) one tenth the surface intensity. Take the absorber concentration to be 10 mmol dm−3.You have two solutions of the same compound that are blue. one is very pale and the other is very intense. Absorbance of each solution was measured with a spectrophotometer at the same wave length at which the solution absorbs. (A) Which solution has the higher absorbance? (B) Which is the more concentrated solution?The ultraviolet spectrum of aspirin shows a secondary absorption band at 271 nm. If a solution of aspirin in water, with a concentration of 1×10-4 molar solution is examined at 271 nm, what will be the absorbance reading (ℇ = 1000) and what will be the intensity ratio, IO/I, respectively?