4. Why do we have to wash the ether layer using 1 N HCl during the workup?

Q: methyl group.

A:

Q: Sove for the (E) Molecular weight of urea, (F) Freezing point of urea and (G) Percent Error. Given:...

A: The freezing point depression can be calculated by the molality (m) and freezing point depression co...

Q: 12 The molar heat of combustion, A H;, of sucrose is -5643.4 kJ mol 1, If 0.250 moles of sucrose is ...

A: Given :  12.  ∆Hc° of sucrose = -5643.4 KJ mol-1  Moles of sucrose = 0.250 moles  Temperature = 16°C...

Q: The mean particle size by number is? and The mean particle size by mass is? Use the given data on th...

A: Given:

Q: Question 5 What is the pH of 0.01 M acetic acid solution (Ka = 1.8x10-5) O 3.22 O 3.55 O 3.37 O 4.24

A: Concentration of acetic acid = 0.01 M Ka = 1.8 × 10-5

Q: If pressure is expressed in atmospheres and volume is expressed in liters, PAV has units of L atm (l...

A:

Q: 5) 4-nonanone has the mass spectrum shown. Propose structures for fragment ions of m/z 142, 99,86, 7...

A: For m/z =142 Structure is :       CH3-CH2-CH2-CH2-CH2-CO-CH2-CH2-CH2+ For m/z = 99 Structure is :   ...

Q: The reaction 2 C4H10(s) + 13 O2s) - has AG° = -5407 kJ. Determine the value of AG°; for C4H10(8). 8 ...

A: Given reaction is :  2 C4H10 (g) + 13 O2 (g) → 8 CO2 (g) + 10 H2O (g)and ∆Go = -5407 KJDetermination...

Q: give the iupac name. do not use the 2013 method of organic nomenclature.

A:

Q: Identify the functional groups of the encircled item: STRUCTURE A1 #2 OH N. #1 CI STRUCTURE A2 3 HO ...

A: Given structures are :  Identify the circle functional groups = ?  

Q: lethane (CH,) gas and oxygen (0,) gas react to form carbon dioxide (CO,) gas and water (H,0) vapor. ...

A: Given Reaction:-  CH4(g) + O2(g)  ----->  CO2(g)  + H2O(g)  Number of moles of methane = 7.0 mole...

Q: Differentiate the carbonate buffer and phosphate buffer systems in term of pH and pKa

A: A buffer is a solution which resist change in pH and obtained when a weak acid and the salt of its c...

Q: Gaseous butane (CH,(CH,),CH;) reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide ...

A:

Q: How much energy is required to raise the temperature of 11.1 grams of solid iodine from 24.8 °C to 3...

A:

Q: Gaseous ethane (CH;CH3) reacts with gaseous oxygen gas (02) to produce gaseous carbon dioxide (CO,) ...

A: Ethane reacts with oxygen to form carbon dioxide and water. The equation for the balanced chemical r...

Q: Gaseous butane (CH, (CH),CH,) reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide ...

A:

Q: Identify the product in each of the following reactions: Nal (1 mol) (a) Cl, C5H10CII acetone Cl SNa...

A: Given data :-

Q: b) Pyrrole and indole both react with the reagents shown below to give compounds E and F respectivel...

A: Pyrrole and indole both are undergoing electrophilic substitution reaction.  We have to tell the reg...

Q: e volume of the balloon?

A:

Q: A gas has the initial conditions of: 21.2 Liters • 279 K 1.03 atmospheres If its pressure is increas...

A:

Q: The equilibrium constant for the reaction Na2(g) → 2Na(g) is 2.47 at 1000. K. Calculate the value of...

A: A question based on chemical thermodynamics that is to be accomplished.

Q: Decide whether each molecule or polyatomic ion is polar or nonpolar. If the molecule or polyatomic l...

A: Given compounds: CH4 OCS HBr It has to be determined whether they are polar or nonpolar. If they are...

Q: 4. For the following aldohexoses which of them will give an optically inactive compound when reacted...

A: HNO3 is strong oxidizing agent      option IV is correct

Q: Section A the solid is warming but also not melting. Section B is Melting. Section C the Liquid is...

A: Answer : From temperature, -5oC to 5 oC, solid states gets heated ( part a) from temperature 5 oC ( ...

Q: Calculate the molality of a solution that contains 51. 2 g of naphthalene, CH, in 500 mL of carbon t...

A:

Q: Hydrocarbons, compounds containing only carbon and hydrogen, are important in fuels. The heat of com...

A:

Q: There is a 15.85% by mass aqueous KCl (molecular weight 74.5513 g mol–1) solution at 25 °C. The dens...

A:

Q: Which salt below will produce the lowest [H 3O +] in an aqueous solution? 0.1170 M N2H5Br, Kb(N2H4)...

A: Salts dissociates into ions and these ions get solvated in the aqueous media and establish equilibri...

Q: A flask is charged with 0.124 mol of A and allowed to react to form B according to the reaction A(g)...

A:

Q: 5.40 In some cases, the Friedel–Crafts acylation reaction can occur intramolecu- larly, that is, wit...

A:

Q: Calculate the mass of forsterite (Mg, SiO,) that contains a million (1.000 x 10°) magnesium atoms. B...

A:

Q: For the reaction below, K = 0.11 at 375°C : ?2 (?)+3 ?2 (?)⇌ 2 ??3 (?)  If the initial concentratio...

A: For a reaction, A + B = C+D the reaction quotient, Q = [C][D]/[A][B]  Now if the value of Q = k then...

Q: Which of the following equations is a mathematical definition of enthalpy? Ο ΔΗ- ΔΕ-ΡAV Ο ΔΗ-ΔΕ + ΡA...

A: enthalpy is the sum of the internal energy and the product of the pressure and volume of a thermodyn...

Q: Draw the product when the hydrogen atom bonded on the deuterated carbon undergoes a thermal sigmatro...

A: The given molecule may undergo sigmatropic hydrogen shift in thermal as well as photochemical condit...

Q: Q/Write the possible compounds from the reaction of one and a half mole of benzaldehyde with one mol...

A: Benzaldehyde reacts with acetone and undergoes condensation reaction. Here we have to find out the c...

Q: In writing the equilibrium constant, the concentration of the product should be placed in the expone...

A:

Q: 1. а) Consider the reaction scheme below. PhLi HONH,, HCI A C ELOH B D (ii) Outline the mechanism fo...

A: Concept :  1) reaction of amine & ketone leads to imine molecule.  2) Lithiation can be done usi...

Q: There is a 15.85% by mass KCl (molecular mass is 74.5513 g mol) solution at 25°C. The density of the...

A: We know that , Osmotic pressure= (Molar concentration of solute*ideal gas constant*temperature)

Q: hat is the molality of a solution labeled "8.6% ucose (C_H „0) by weight?" *12 Tote: If the question...

A:

Q: he pH of a

A:

Q: Liquid octane (CH, (CH. reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide (CO,) ...

A: We are given combustion reaction of liquid octane. Mass of H2O formed = 3.26g Mass of octane reacted...

Q: 5-57 You know the mechanism of HBr addition to alkenes, and you know the effects of various substitu...

A:

Q: Which of the following is the weakest acid? HOI    HOCl    HOBr    Since they are all oxyacids, ...

A:

Q: 5. Suppose that the CH3 group connected to the nitrogen in methamphetamine were instead a CH2CH3 gro...

A: Given that, in methamphetamine, the -CH3 group is connected to the nitrogen atom. Now, we have to te...

Q: Use the systematic treatment to get the concentrations of all the species in a solution of: a.) 0.35...

A: We have been asked to find the prepartion method of the given concentrations using systematic treatm...

Q: Using activities, what is the molar solubility of Zn(OH)2 in 0.0100 M KCl? Thermodynamic Ksp = 3.0 x...

A:

Q: Wine goes bad soon after opening because the ethanol (CH,CH,OH) in it reacts with oxygen gas (0,) fr...

A:

Q: Fill in the squares in the following chemical equations: NaOH/H,O ELOH

A: Concept: 1) aldol reaction  2) Robinson annulation ; Michael reaction followed by aldol reaction is ...

Q: Weight of Coin 1 (g) Weight of Coin 2 (g) Weight of Coin 3 (g) Weight of Coin 4 (g) Weight of Coin 5...

A:

Q: thermometer. A 55.1 g sample of polystyrene is put into a calorimeter (see sketch at right) that con...

A: