Q: Mary experimentally determines the boiling point of ethanol to be 72.2°C when it is actually 78.2°C.…
A: The experimental error is, = Experiment value - actual value = 72.2°C - 78.2°C = -6
Q: Calculate Ksp for LiNO3 at 25 °C. Li+(aq) NO3-(aq) LiNO3(s) ΔG°f (kJ/mol) -293.3 -110.2 -381.1…
A: Given: ∆G°f (Li+) = -293.3 kJ/mol ∆G°f(NO3-) = -110.2 kJ/mol ∆G°f(LiNO3) = -381.1 kJ/mol And…
Q: What is the value of Kw at 25 ∘C?
A: Ionic product of water:The ionic product of water (Kw) is depends on the concentration of H+ and OH-…
Q: Calculate the selubility df CusCN in OilM Na S2Q> 2:3x107
A: Given [Na2S2O3(aq)] = 0.1 M From mass balance, [S2O32-(aq)] = 0.1 M
Q: Chloroform has ∆Hvaporization = 29.2 ??/??? and boils at 61.2 °C. What is the value of…
A: □Hvap. = 29.2 kJ/mol = 29.2 × 1000 = 29200 J/mol Boiling point (T) = 61.2 °C = 61.2 + 273 =…
Q: What is the value of 27 C on the Fahrenheit scale? SHOW ALL WORK. 52 91 81 23
A: Concept Conversion of Degree Celcius to Degree Fahrenheit (oC ×95)+32 = oF
Q: 2- Heat Decomposition mass Curve of sample S with mass 25.00 mg is shown below. Study the TGA…
A: An atom is the basic and fundamental unit of matter. An atom consists of electrons and the nucleus…
Q: Experimental groups in which you expect a certain predetermined change to occur are: A) Negative…
A: A multiple choice question based on research methodology, which is to be accomplished.
Q: CHOH acid heat
A: Given reaction is : Complete the reaction = ?
Q: но DIBAL - H Ph H+ workup e
A: Organic reactions are those in which organic reactant react to form organic products. DIBAL-H is…
Q: a) State TWO (2) differences between those two calibration curves. b) State THREE (3) limitations…
A: A calibration curve or standard curve is a technique that finds out the strength of any substance…
Q: 1) Mg Br2, FeBr3 B 2) H,0 PCC HO OH (H*1-H,0
A: The steps involved in the conversion are- Electrophilic bromination Formation of grignard reagent…
Q: hp of methanol and 1-propanol are 1.331 and 1.387 respectively. Calculate the mole percentage of…
A: The mole percentage of a compound can be determined by the following relationship between refractive…
Q: 6. 1. 8. 9. 5. 1. 2. 3. NO₂ Ő ÇOCH3 NO₂ Sn, HCl, Heat (CHICO)20 KMnO4, NaOH H₂O* Brz AlBr3 CH:CH…
A:
Q: What conclusion can you reach if both Mw and Mn are determined to be identical?
A: Solution Molecular Weight of Small Molecules The cryoscopic method was formally introduced in the…
Q: 3Cu() Fe)-30) Fe(0-162 005 KJ Ⓒ052000 V O 056000 V O 0 56000 V O-052000 V
A:
Q: In Fe + O2 --> Fe2O3 what is the coefficient for Fe?
A:
Q: Prograrr Potential Energy 100 150 200 250 300 350 400 450 500
A: Answer:- This question is answered by using the simple concept of calculation of energy using the…
Q: 5. Hexane (C6H14) fuel is burned with ideal proportion of air. Calculate the ideal air-fuel ratio by…
A:
Q: answer only 1and 2 thank you!
A: Alcohol reacts with acid to form ester.
Q: Calculate the AG", rxn using the following information. 4 HNO3(g) +5 N2H4(1) 7 N2(g) + 12 H20() AG…
A:
Q: Part IlI: Enthalpy of Precipitation Sodium Acetate Trihydrate, NaC2H3O2 3H20 Mass of NaC2H3O2 3H2O…
A: The ∆H for the precipitation of NaC2H3O2.3H2O from a saturated solution is to be calculated from the…
Q: i) Ph Ph hv E CH3 CH3 ii) F heat iii) hv G
A: The first reaction is a [2+2] cyclo addition reaction and forms a the following product. The above…
Q: ОН Н ОН Н H20 H2N 5 - 10 min 22 °C II II NaBH. | Ethanol 22°C ОН Н Acetic Acid ОН Н Acetic Anhydride…
A: Imine reduction with nabh4/etoh gives amine ..
Q: What are the products for the equation below: Balance this equation, Place a "1" where expected.…
A: Single replacement reactions: In such reactions, one of the reactants replaces the other one in…
Q: Perform the Q-test on the following percent KHP values: 35.87 % 36.40 % 37.04 % 39.98 % Select all…
A: Q test is used to identify outlier within the test data. (1) Arrange in increasing order of…
Q: Perform the Q-test on the following percent KHP values: 30.97 % 35.99 % 36.54 % 37.22 % Select all…
A: Given data: Percentage of KHP: 30.97 %, 35.99 %, 36.54 %, 37.22 %
Q: R= 0.241 kPa * km^-1 convert R to ? kJ*m^4
A:
Q: What is the answer to the following calculation, to the correct number of sig figs?…
A: What is the answer to the following calculation, to the correct number of sig figs?
Q: What is the coefficient the should be placed in front of lithium chloride (LICI)? * Liz0 + FeCls…
A: Coefficient of Species : The number written before the formula of a species ( reactant or product )…
Q: Br K® t- Buo br t - BUOH low temp Heat
A: The reaction given is,
Q: H. T H H H H H H mary (17), secondary (27), or Tertiary (3"). Answer Bank 3
A:
Q: CO2Et Heat EtO2C You do not need to click anything You do not need to click anything A Moving to…
A:
Q: (3)ONE-(8)ON + (3)0N Express the enthalpy in kilojoules to four significant digits. Submit Previous…
A: Heat of reaction is difference of energy of product and energy of Reactant. If heat of reaction is…
Q: Page 1 of 1 Chem 143 Specific Heat Capacity Lab Report. 4.) Calculate the change in temperature of…
A:
Q: Molecular weight MW 1. Find the MW of Iron(III) pyrophosphate. (Use whole numbers for each of its…
A: Note: As per company policy we are supposed to attempt first three subparts only. Please repost…
Q: Calculate the sum of coefficients for the following equation balanced for acidic conditions. XO5-2…
A: The given reaction is, XO52-+Y23+ → YO2+ + XO2-
Q: 1. -MgBr H,0* workup LOTMS 2. ТВАF 3. POCI, / pyridine (excess) 4. Нeat
A: NOTE: There is some problem in question (either reactant carbon atoms or in reagent given). Here I'm…
Q: 1) MeMgBr (excess) 2) H20 SOCl2 H2SO4, heat Но ÓH I. HO ОН II. IV. O i. only iii. only none of the…
A: Applying concept of organic synthesis and reagent.
Q: An analyst analyse two cans of beer each 5 times to determine the ethanol contents. The first can…
A: By applying t-test for comparison of the means of two samples: ±t = [(x1 - x2)/Sp] × √(N1N2/(N1 +…
Q: Calculate the average deviation of the following specific heat determinations: 0.18 J/g °C 0.34 J/g…
A:
Q: 2 point When x is less than or equal to 2, what equation is shown in the graph? °
A: The right answer is f(x) = |X|.
Q: Br 2) 3) CH 3 MgBY Aq. Woneup m-cPBA → PBr3 > PBV3 CH3 MgBr → - CH3 Mg Br → Aq. workup Lom-CPBA Aq…
A: Given reactant is : Product formed is: What are the suitable reagents for this conversion?
Q: At the end of the experiment, it was discovered that the thermometer had not been calibrated. When…
A: Enthalpy of reaction, in calorimetry, is calculated by the formula: ∆H = mass * specific heat…
Q: How do I calculate difference Ha? First page is my data. Part A is for the question
A: Run-1 (part-A) q = m c∆T q = heat of reaction m = mass Volume of water = 100 mL and density of…
Q: What weight of mercury bichloride should be taken as sample, assuming 100% purity, so that 0.5 g og…
A: Weight is calculated as, (weight of sample * GF)/ Weight of analyte.
Q: Consider the following information. 2 H2S(g) +3 O2(g) → 2 SO2(g) + 2 H₂O(g) H2S(g) 02(g) 205.2…
A:
Q: Which of the following values for R2 shows the strongest correlation between the X and Y values in a…
A: Introduction : We have to tell which R2 shows the strongest correlation between the X and Y values…
Q: the injector is kept at higher temperature than the column so that it will move quickly. If the…
A: In the given problem we have to check whether the given two statements are correct or not in…
Calculate the Ka of X in chloroform. Answèr in 4 significant figures.
Step by step
Solved in 2 steps with 2 images
- The best liquid mixtures for separation by simple distillation need to have boiling points that differ by at least ___________ oC. 10 20 30 40A student is given a solid mixture containing 2 polar components and 1 nonpolar component. The student is asked to separate the nonpolar component by solid-liquid extraction. Which of the following solvents is the most appropriate to use for the extraction? Group of answer choices methanol (CH3OH) H2O hexane (C6H6) ethanol (CH3CH2OH)A chemist is asked to separate the components of a mixture composed of 1.00 g each of the two compounds shown below. The chemist has access to the following bases: 10% aqueous NaHCO3 and 10% aqueous NaOH. Which base and how many mLs of the base (i.e., the minimum amount) are needed to completely separate these compounds from each other by liquid-liquid extraction?
- The solubility of compound B is 59 g per 100 mL in boiling methanol and 30 g per 100 g in cold methanol, while its solubility in water is 7.2 g per 100 mL at 95oC and 0.22 g per 100 mL at 20oC. What solvent would be better for recrystallization of the compound? ExplainIn an experimental study of membrane-like assemblies of synthetic materials, a phase diagram like that shown was obtained. The two components are dielaidoylphosphatidylcholine (DEL) and dipalmitoylphosphatidylcholineIDPU. Explain what happens as a liquid mixture of composition xDel = 0.5 is cooled from 45 °C.(1a) Pure benzophenane freezes at 66.6 °C. A solution of 7.75 g of biphenyl (C12H10; molar mass = 154.2g/mol) plus 200.08 g of benzophenane froze at 59.9 °C. Calculate the Kf of benzophenane in °C*kg/mol. (b) An unknown solution with possible cations (Ag+, Hg22+, Pb2+) is treated with 6M HCl and a white precipitate forms. Hot water is added to the precipitate, and a white solid remains after filtration. The white solid is treated with aqueous NH3, and the precipitate turns grey or black. The resulting solution is treated with HNO3 and no precipitate forms. What cations can you determine to be present, absent or maybe present? Explain your reason
- 1. Why should the stopper always be removed from a separatory funnel whenever a liquid is being drained through the stopcock?2. The distribution coefficient, KD (ether/water), between ether and water for aspirin at room temperature is 3.5. What weight of aspirin would be extracted by a single extraction with 60 ml of water from a solution of 10 grams of aspirin in 100 ml of ether? Calculate the weight of aspirin which would be removed by three extractions with 20 ml portions of water.I’ve done this question but I think I’ve done it wrong. Calculate how much 95% Ethel alcohol will be prepared to dissolve 0.3g of sulfanilamide at 78 degrees using the table (pictured below from my textbook) and, based on that volume, calculate how much sulfanilamide will remain dissolved in the mother liquor after the mixture is cooled to 0 degrees. For the volume at 78 I got 1.47mL and for the difference once it cooled to 0 degrees I got 19.96 mL. If I got these wrong could you point me in the right direction as how to solve this? Thank you!What is the weight percent of toluene in a mixture of toluene and n-heaxne that has a spevific gravity of 0.832
- A 18 g of unknown organic sample was dissolve in 756 mL of benzene. The boiling point of benzene was increased by 3.36oC. As the first step of analysis, determine the moecular weight of the unknow sample? Kb of benzene= 2.64oC/m Bb of benzene = 80.09 oC density of benzene = 0.874 g/mL at 25 °C Answer in whole number, no units required.10g coffee 4g sodium carbonate 40m dichloromethane 160ml distilled water coffee filter What are the principles behind caffeine being extracted from coffee using the above items? 1st sodium carbonate mixed with coffee then brought to a boil for 20min then solution/grinds are filtered. Then solution is added to a separatory funnel with 15ml of dichloromethane and two layers are observed so the bottom layer with DCM contains the caffeine, then this layer is collected in a beaker and dried out using molecular seeds. Then the solvent is brought to a boil with crude caffeine remaining and recystallized using 95% ethanol and brought to a boil again. Then the contents are vaccum filtered and allowed to dry resulting in 30mg caffeine.A mixture of 20 mL of isoamyl acetate (MW=130.2 g/mol and density= 0.88 g/mL) and 20 mL of methyl benzoate (MW= 136.2 g/mol and density =1.09 g/mL) is distilled. Calculate the mole percent for each component. Use these mole percents and the figure below to answer the following questions.a. What is the initial boiling point of this mixture?b. What is the composition of the vapor in equilibrium with the liquid? Is this composition the same as the composition of the initial condensate from simple distillation?c. Instead of a simple distillation, you decide to use fractional distillation. Assuming two theoretical plates, what is the composition of the first fraction collected?