Chemistry Questions and Answers May 11, 2020

What is the name of the compound shown here CH, CH, COH Enter the name.of the compound.

Use the data in the table above to plot In[t-BuCl]; vs time (s). Include labeled axis, a title, and a linear trendline. Upload your plot here.

Concentration of NaOH stock solution 0.01 M Concentration of tBuCl stock solution 0.2 M Volume of tBuCl solution 10 mL stock stock solution added to 25 mL acetone Table view List view Kinetic Data Volume of Moles of added added base Amount of t Time, t (s) base (mol) BuCI (mol) Buci InBuCI (mL) First addition 44 0.50 Second addition 102 0.98 Third

a) Redraw the structures of DCC, DMSO, and oxalyl chloride, showing charges and partial charges as appropriate.

C6H11 NCN .CI CeH11 N H CSH11 N H. CI DCC DMSO oxalyl chloride DCU

Write chemical equation intramolecular dezamination Serine. Specify enzymes and co-enzymes for reaction. Name the obtained product

4. 4.1 4.2 Propose a mechanism for each of the following rearrangement reactions. HBr(aq) HCl(aq) NMe

How many moles of hydrochloric acid are present in 75.8 mL of 0.765 M hydrochloric acid Report your answer with four places after the decimal.

Please put the reagents in the correct order from the box on the right to recieve the end product. NO2 CI AICI Br HNO3, H,SO4 step 1 step 2 step 3 C Br2, FeBrg OB then A then C O A then C then B O C then A then B if the reaction proceeded A B C, which would be the product NO2 NO2 Br (a) Br (b) O (a) O (b)

Use the following data for the remaining questions Mass of Mg (Mm 24.31 gmol) 0.289 g Temperature of water bath 23 C Volume of Florence Flask 491 ml. Volume of water left in flask 182 ml. 762.0 torr Valhalla Atmospheric Pressure 4. What would the volume of the gas be at STP in the unit LITERS Use the correct number of significant figures or

Use the oxidation number method to balance the following equations. 1) Fe N2 FeN 2) Cu NO, Cu NO H20 3) MnO4 N0 H Mn2t NO, H2O Zn SO.2 H Zn 5) 12 NO, H IO, NO H20 6) MnO, H Mn2t Cl2 H2O 7) FeOs Fe H,SO4 FeSO. H20 8) Co H MnO Co2 Mn2 H2O 9) F 10, H H2O 10) CrO SO, H Cr SO,2 H2O 4)

Write the two balanced halfreactions for compound Au(OH)3. can you break it down step by step Im confused on how to do this. thanks.

The sample of tap water is titrated with standard ca 0.01 M EDTA solution, and the total harness calculated as parts per million of CaCO3. The total hardness of water is generally due to dissolved Ca and Mg salts. Both of these react with EDTA to form a complex. The Ca complex is more stable than the Mg complex. During the titration, the Ca2+ will

(B) DETERMINATION OF THE TOTAL HARDNESS OF WATER It is customary in practice to express the total hardness of water as parts per million (ppm.) Ca or ppm CaCO3. PROCEDURE EDTA solution in A was diluted 10 times (pipetted 25 mL in a 250 mL volumetric flask diluted to the mark in a volumetric flask). 6 50.00 mL of tap water was placed in a conical

STANDARDIZATION OF ca 0.02M KMnO4 SOLUTION WITH STANDARD OXALIC ACID. REQUIREMENTS (1) KMnO4 solution (0,02M) (2) Oxalic acid 0.05M (3) 3M H2SO4 solution The oxalic acid dihydrate solution was prepared by weighing out accurately an appropriate mass of the solid, transferred it to a 250 cm3 volumetric flask and made up to the mark with distilled

A 2.45Mev neutron is elastically scattered through an angle of 41 degrees in a collision with a He nucleus. What is the actual change in lethargy for this neutron that scatters off of the Helium4 nucleus Use three decimal places in your answer.

Explain the effects the addition of glycerol (a triol) will have on the molecular architecture of the following polymerization reactions: a) Condensation polymerization of terephthalic acid + ethylene glycol b) Condensation polymerization of 6-hydroxyhexanoic acid

1. How many inner, outer, and valence electrons are present in an atom of each of the following elements (a) O (b) Sn (c) Ca (d) Fe 2. Identify each element below, and give the symbols of the other elements in its group (a) Ar 4s3d04p (b) Xe 6s4f45d 3. Arrange each set in order of increasing atomic size (c) Cl, K, S (d) Mg, K. Ca 4. Rank the ions

(a) In the electrolysis of aqueous Na2C204, how many liters of H2(g) (at STP) are generated by a current of 82.6 A for a period of 54.0 min The unbalanced chemical reaction representing this electrolysis is shown below. Na2C204(aq) H20(1) CO2(g) H2(g) NaOH(aq) liters of H2(g) is generated by this electrolysis. (b) How many moles of NaOH(aq)

1. Locate an article on the nutritional beliefs of a culture or religion. Provide a summary of the article and include a link to the article. What interventions should be implemented to ensure cultural competence? Use evidence from one scholarly source other than your textbook or ATI book to support your answer. Use APA Style to cite your source.

What quantity of energy is needed to heat a 1.00mole sample of HO from 34.0C to 120.0C State Specific heat capacity (Jg C) Ice 2.03 Liquid 4.18 Steam 2.02 AHvap 40.7 kJmol AH fus 6.02 kJmol kJ Energy

Which of the following statements about the behaviour of organic compounds after exposure to light as represented in a Jablonski diagram are FALSE Select one or more O The slowest process in a Jablonski diagram is an intersystem crossing. O The slowest process in a Jablonski diagram is fluorescence. O The fastest process in a Jablonski diagram is

A solution of NaPO, is added dropwise to a solution that is 4.30e02 M in Ag and 4.81e07 M in Cu2. nlon The Keo of AgPO, is 8.89e17, The Kap of Cus(PO4)z is 1.4e37. which co id we fo Calculate the concentration of PO, present in the AgCu solution when the first (initial) cation begins to precipitate, and the concentration of PO present in this

Q4 Complete the following reactions schemes by drawing the messing intermediateproducts HOO R Peraxyacid H,SO.H.0 1. (Acidic hydrolysis) OH Nalo. 2. OH HO Me,CO 3. HO. ZnCl, OH OMe OH 4 Ozonolysis H20

Q4 Complete the following reactions schemes by drawing the messing intermediateproducts Me,CO ZnCl, OH OMe OH Ozonolysis OH

A RIXS spectrum measured on a material containing platinum yields three RIXS features at 1.5, 3 and 7 eV energy loss at an incoming energy of 11,560 eV. What are the respective outgoing photon energies of these features corresponding

What is the G sys for six, 30 g, ice cubes floating in 546 ml of water sealed in a Thermos, left in a backpack for 720s, on a day at the beach?

Calculate the solubility of MCl in the water taking activity effects into account. As MCl dissolves, the ionic strength increases so there is a feedback effect: when MCl dissolves, it increases , which decreases activity coefficients, which allows more MCl to dissolve, which increases , which... You will have to solve this recursively. Repeat

What is the name correct name for MnCl, O Manganese (IV) chloride O Manganese chloride O Manganese chlorate Manganese (IV) chlorate

A) Identify Atoms That Have Charge From Equation below. B) By Showing The Charged (If Present), Rewrite Each Of The Above Reactions And Show The Curved Arrows (Mechanism) CH3OH + HI CH3OH2+ + I- CH3NH2 + HCl CH3NH3+ + Cl-

3. Use the standard entropy to calculate AS and AS and Gibs free energy AG for the following reaction at 25 C. CsH.g) 5 O(g 3CO(g) 4HO)

In reverse phase chromatography, an uncharged analyte will have a larger or smaller capacity factor? And vice versa, would a charged have a larger or smaller capacity factor in reverse phase chromatography? Explain.

For 14 points, match each of these reactions with their types. (SR) Single Replacement (DR) Double Replacement (DC) Decomposition (CM) Combination (X) Combustion. 2Nl3(s) N(g) 312(g) MgCl(aq) Pb(NO3)2(aq) PbCl(s) Mg(NO3)2(g) 2V(s) 3Cl(g) 2VCI3(s) NaBr(s) Li(s) Na(s) LiBr(s) C5H12 (s) 80(g) CO(g 6HO(g) KCI(s) Nal(s) NaCl(s) Kl(s)

The pihelix is a rare secondary structural element in proteins that resembles an alpha helix but has slightly different properties. Notably, hydrogen bonds within a pihelix display a repeating pattern in which the backbone CO of residue i hydrogen bonds to the backbone HN of residue i5. Based on this information, which of the following are true

Which one of the following alkenes is the Zaitsev product formed by the reaction of hydroxide with 3bromo2,3dimethylpentane

Which one of the following chemical species would be the strongest base NH2 CH3 CH3 CH3S CH3

Which one of the following chemical species corresponds to the most stable carbocation CFCF2 CH3 CH3 CH3 CH3CH2 CH3

Which one of the following chemical species corresponds to the best leaving group O CH3OH O CH H HO NH O CH10 O

b) For the solidification of a metal, Tm 1000K with undercooling of 200K, calculate the rate of homogeneous nucleation in nucleims. Neglect activation energy. Assume v10o12s and spd estimated as 1028m, AH1.26x10 Jm, yLs 0.16 Jm2.

Molecule Lewis Structure Electronic Shape Molecule shape Polar molecule? (yes/no) H 2 O SOCl 2 CO HNO 3 N 2 H 2 OCN CH 3 (CH 2 ) 4 CH 3

Rank the indicated hydrogen atoms in the following molecule in order of increasing acidity, i.e. 1 being least acidic, 4 being most acidic. Hd Ho Choose... Choose... Choose... Hc Hd Choose...

Is the C bonded to L 1, 2, or 3 Based on this, what pathways are possible Factor Sw1 SN2 E1 E2 Strength of nuB Concentration Leaving group ability Solvent Total of checks If a tie, consider temperature. Which pathway is preferred concd NaN, TIO CH,CH,OH room temp hint Na is a small, linear anion so a good nu

Is the C bonded to L 1, 2, or 3 Based on this, what pathways are possible Factor SN1 SN2 E1 E2 Strength of nuB Concentration Leaving group ability Solvent Total of checks If a tie, consider temperature. Which pathway is preferred CI concd (CHa)CONA DMF O C

26. You have a 4.00 mole sample of the compound. a. What temperature does this sample melt at b. How much heat is required to melt this sample c. What temperature does this sample boil at How much heat is required to boil this sample d. e. How much heat is required heat the sample in the liquid phase from Tm to Tb f. What is the total amount of

The diagrams below represent aqueous solutions that contain lonic or molecular solutes. The solvent molecules have been omitted for clarity Identify each of the following drawings as representing a strong acid, a weak acid, or something that is not acidic at all.?

The diagrams below represent aqueous solutions that contain lanic or molecular solutes. The solvent molecules have been omitted for clarity

Using curly arrow notation, suggest a mechanism for the generation of catalytically active Pd(0) from the Pd(II) containing Pd(OAc) 2 . Draw the catalytic cycle for the Heck reaction of F and G to give the product H.

Pd(OAc)2 (2 mol) RuPhos (4 mol) (F) CI NHBOC NBoc NHBOC (H) (L) (G) RuPhos P(Cy)2

i) Demonstrate your understanding of retrosynthetic analysis by redrawing step (iii) in the retrosynthetic direction. Show the disconnection, retrosynthetic arrow, and synthons corresponding to the starting materials. ii) Two separate reactions are achieved in step (iv). Briefly explain what each of these is and use your answer to illustrate why

0a base ca TOH 6MHO C. 24 h Boc Fmoe

i) Suggest reagents that would achieve steps (ii) and (iii) and explain the order in which you choose to perform these steps. (3 marks) ii) Consider step (v) of the synthesis. Briefly explain the two transformations that occur in this step, then give two reasons for the choice of a benzyl ether to protect the alcohol of starting material 17. (3

OH a) nBuli OTBDMS S Bno 16 b) O. 17 OBn OMOM NBoc Bno NHBoc 18 Bno 19 (V) Ha Pa(OH),C, THE OMOM NBoc OMOM M) HO 15 20 TBDMS terfbutyidimethylsly MOM methaxymethyl Bn benzyl Boc terfbutoxycarbonyl

Using your knowledge of Felkin-Anh control, rationalize why compound (4) has a syn stereo chemical relationship between the stereo genic centers labelled 3 and 4.

LDA (2) EtS (1) recall LDA Li (3) EtS (4)

Using 3D representations, invoke a Zimmerman structure to account for why compound (4) has the anti stereochemical relationship between the stereogenic centers labeled 2 and 3.

LDA (2) EtS (1) recall LDA Li (3) EtS (4)

Propose a mechanism for the Swern Oxidation, step (c).

b. EtMgBr, THF a. . Bno. Bno. 2 c. DMSO, (Cod)2, Et,N OTES d. Bno. Bno. 3 Et ethyl (CH,CH3) Bn benzyl (CH,Ph) TES triethylsilyl (Si(CH,CH33) TBS tertbutyldimethylsilyl (Si((CHaC(CH3k) DMSO dimethylsulfoxide

a) Identify and name the type(s) of selectivity occurring in step (b). (2 marks) b) Step (d) is accomplished using carbonyl diimidizole 15. Outline a mechanism for this transformation. (3 marks)

TBSO OBn OTPS OTBS TPSO a. nBuli, THE OBn NNHSO,Ar 10 b. TBSO TBSO TBSO PS OTPS OBn PS OBn c. LIAIH4. Et0 OBn d. H 11 13 12 TPS tertbutykdiphenylsilyl (Si((CoHs),C(CHs)s) TBS tertbutyldimethylsilyl (Si((CHa)C(CHa)3) Bn benzyl (CH,Ph) acac acetylacetonato (CH,COCH,COCH3) Buli butyl lithium (CHCH,CHCH2LI)

Draw compound 13 in your answer book and circle all the protecting groups (1 mark) What reagent(s) would you choose to selectively remove just the silyl ethers from 13? (1 mark) Using your answers to the parts above, explain what is meant by an orthogonal protecting group strategy. (1 mark)

TBSO OBn OTPS OTBS TPSO a. nBuli, THE OBn NNHSO,Ar H 10 b. TBSO TBSO TBSO PS OTPS OBn PS OBn c. LIAIH4. Et0 OBn d. H 11 13 12 TPS tertbutykdiphenylsilyl (Si((CeHshC(CH3)s) TBS tertbutyldimethylsilyl (Si((CHa),C(CHa)s) Bn benzyl (CH,Ph) acac acetylacetonato (CH,COCH,COCH) Buli butyl lithium (CHCHCH2CH,Li) 1.....

By using 3D representations, rationalize why the deprotonation of ketone (18) with LDA gives the trans-configured enolate (19).

70 3 TESO OMe OMe LDA TBSO TBSO TESO Tr Tr (18) (19) (20) OTBS recall that LDA is Li .N. TESO OMe TESO TBSO Tr OTBS (21)

By using your knowledge of Felkin-Anh control, rationalize why compound (21) has an anti stereochemical relationship between C2 and C3.

OLI 3 TESO OMe OMe LDA TBSO TBSO TESO Tr Tr (18) (19) (20) OTBS recall that LDA is Li .N. TESO H OMe TESO TBSO Tr OTBS (21)

a) Comment on the selectivity observed in step (vi) (the reaction of 3 with LiN3). What type(s) of selectivity is/are observed? How/why does it arise? )

CH,OH Pb(OAc)e v. HCIu CO,Et OH OH OH CH,OH v. 2 TBSO TBSO viix TBSO yi. LIN, THE then H0 TBS tertbutyldimethylsilyl (Si((CHahC(CHa)) Ac acetyl (COCH,)

a) Demonstrate your understanding of protecting group chemistry by outlining a mechanism for step (iv). (In this step the acetonide (ketal) is hydrolyzed to unmask the diol which then closes onto the ester.)

CH,OH Pb(OAc). v. HCI e CO Et OH OH OH CH,OH v. 2 TBSO TBSO viix TBSO yi. LIN, THE then H0 3 TBS tertbutyldimethylsilyl (Si((CHahC(CH3)) Ac acetyl (COCH3)

a) Comment on the selectivity observed in each of steps (i) and (ii). What type(s) of selectivity is/are observed? How does it arise? (4 marks)

I, Me,NH.HCI, CH0 O C, 3 hours H. HS(CH),NH2, conc. HC OC, 18 hours 5 OH 6 OH NH2

a) Using Zimmerman-Traxler transitions state models, explain why the observed C(3)C(4) stereochemistry is formed in product (C). Is this the syn or anti isomer? (10 marks) n

LDA OH THF 78 C Me Si Me Me Me O. (B) Me Me Bu Bu Me (A) (C) recall that LDA N.

i) Suggest a structure for the missing reagent (G) in the Wittig reaction shown. (1 mark) ii) Is the reagent (H) a stabilized or non-stabilised ylide? Please justify your answer. (1 mark) iii) Using the structures below as a guide, draw Newman projections to show the likely approach of the ylide (H) to the aldehyde (G). Ensure that you label any

MeO. PPH3 Meo (H) Bn . (G) (F) OBn

5. Consider the following reaction. H2O2 (excess) NaOH BH3, THE B Intermediate A a. Predict the structure of Intermediate A (hint it is a cyclic compound), then draw a mechanism for its formation. b. Predict the structure of product(s) B.

i) Illustrate your knowledge of metathesis processes by drawing the mechanism for the reaction of compound (I) to give compound (J) taking into account differences in alkene reactivity. Ensure that you use appropriate curly arrow notation. (13 marks) ii) The intermediate (J) can cyclize under standard RCM conditions to give the desired fragment

Ru Grubbs 1 gen. (2 mol) CH,C, Meo. Meo (4) OBn recal that POys Grubbs 1 gen. Run Ph (F)

i) Suggest a structure for the missing compound (K). (2 marks) ii) What is the name for this intermolecular metathesis reaction? (1 mark) iii) Why is Grubbs 1st generation catalyst not suitable for this type of reaction? (2 marks)

OMe Grubbs 2nd gen. Meo. (2 mol) CH,C2 (K) Bn 0 Bn

For any conjugate acidbase pair Part B What is pK, of the conjugate base of X281 Express your answer numerically. View Available Hint(s) VE pKb pKa pKb 14.00

0.50 g of sodium hydroxide (NaOH) pellets are dissolved in water to make 7.5 L of solution. What is the pH of this solution Express the pH numerically to two decimal places. View Available Hint(s) pH 11.22 Submit Previous Answers Correct Correct answer is shown. Your answer 11.21 was either rounded differently or used a different number of

Benzoic acid is a weak acid that has antimicrobial properties. Its sodium salt, sodium benzoate, is a preservative found in foods, medications, and personal hygiene products. Benzoic acid dissociates in water C6 HCOOH(aq) H2O(1) C6 H5COO (aq) H30(aq) The p K, of this reaction is 4.2. In a 0.69 mol L 1 solution of benzoic acid, what percentage of

A titration of 2.00 ml of hydrogen peroxide solution (Mw 34.01 g mol) used 35.57 ml of 0.1 N (0.02 M) potassium permanganate (Mw 158.03 g mol). a) Write down the coordinated redox reaction between hydrogen peroxide and potassium permanganate. b) How many moles of potassium permanganate does 1 mole of hydrogen peroxide correspond to c) Based on

Please draw PLP-dependent mechanisms for this reaction. General acids/bases may be involved as needed

EPLP Glycine CoASH SCoA ONH3

In a monoclinic crystal with a 5 , b 4 , c 3 , and 95, there is a metal (M) atom at (0,0,0), another at (0,0,1) and an O at (14,14,12). (a) What are the MO bond distances (b) What is the MOM bond angle

You are analyzing iodide from seawater using the cathodic stripping squarewave voltammogram technique developed by Luther et al. The first voltammogram is below. You then fortify the 5.00 mL sample with 0.25 mL of a 18.2 nM standard potassium iodide solution and collect a second voltammogram. You repeat this process three times. Based on the data

Protein A binds its ligand with a Kg of 55 uM and a kon of 8.9 x 10 Ms. If liganded Protein A complexes are equal to 675 nM initially, what concentration in nM is present after 10 seconds Answer numerically with 3 significant figures units of nM.

i) Under conditions B, the mono-methylated product 16 is formed. Draw a mechanism to explain this outcome. What does the position of methylation tell you? (2 marks) ii) Under conditions C, the decomposition product 17 is formed. Draw a mechanism to explain this outcome. Why does the change in reaction conditions (relative to A) open this

Ar A N C. 1.2x CHLI, 78 c Ph. .D i. DO 15 Os Ar B Os5Ar .N. 1.2x CHLI, 78 c . 1x CHJ . HO (workup) Ph. N H. Ph. 14 16 D 1.2XCHLI, 25 C i. D0 Ph. 17 OZ

Suppose that you used reverse transcriptase to copy the ovalbumin mRNA and cloned this complementary DNA (cDNA) into a plasmid vector. Would you expect this cDNA to reanneal more slowly, more rapidly, or at the same rate as genomic DNA Briefly explain your answer. Match the words in the left column to the appropriate blanks in the sentences on the

How many grams of chloride are there in 256 g of magnesium chloride

A purified protein is in a HEPES (N(2hydroxyethyl)piperazineN(2ethanesulfonic acid)) buffer at pH 7 with 600 mM NaCl. A 1 mL sample of the protein solution is placed in a tube made of dialysis membrane and dialyzed against 2.0 L of the same HEPES buffer with 0 mM NaCl. Small molecules and ions, such as Na, Cl, and HEPES, can diffuse across the

1) Why it is important to oxidize any Fe or Ni in the unknown sample 2) What other methods can be used to determine Ca in your sample What are the advantagesdisadvantages of your method as compared to the literature method 3)

Sarins biological effects are due to its reaction with a serine residue in the active site of acetylcholinesterase, an enzyme that is very important in nerve transmission. Select the true statement. Fluorine is the leaving group in Sarin. The active site amine reacts with Sarin. Isopropoxide is the leaving group in Sarin. Phosphine is the leaving

Sarin is a deadly nerve gas that was outlawed by the Chemical Weapons Convention of 1993. However, it has been used at various times as a weapon of mass destruction by terrorists, including a 1995 attack in the Toyko metro and a 2013 attack by the Syrian government on rebel forces during the Syrian civil war. Sarin is an acid fluoride and ester of

4 With the above ion concentrations, calculate the membrane bio potential (Vm) for the cell using the HodgkinGoldmanKatz equation (PK Ke PNa Natle Pc Ci) RT . (PK K PNa Nai Pci Cle) Veq In m ZF Based on the following 44.32 mV 56.27 mV 61.33 mV 44.32 mV 56.27 mV 61.33 mV . . ion permeabilities PK 1.0 ms PNa 0.05 ms Pct 0.55 ms .

Identify the acidbase character of the following substance HN N F cationic acid A. free base (uncharged base) B. anionic base OC. D. uncharged acid O ciprofloxacin O LOH

The unit cell of alphairon is a bodycentered cube (BCC) with a lattice conktant of 0.286 nm. a) Draw 10 L1 direction and (320) plane in a cubic unit cell, b) Calculate the linear density of atoms for the 10 L1 direction in atompm. (I nm 10 m)

5 Carbocation Rearrangements 7) Draw the 6 MOST LIKELY carbocation rearrangements of the following intermediator these 6, circle the two that are LEAST LIKELY to occur. H Br Br

Consider the following isoelectronic series Y3t, Rb, s2, Kr, Br and Se. Which statement is incorrect The number of electrons for each species is 36 The number of protons depend on the species The electron configuration for each species is Ar4s3d104p6 All the abovementioned statements are incorrect

Consider the following reaction with an equilibrium constant, K4, at a given temperature in 14 vessel. Nag) 3H2)2NHg) AH45.7 mol The initial amounts of species are 1 mole for N, 1 mole for H, and 2 moles for NH3. Based on Qc value, the reaction will proceed CA From right products) left (reactants) OB. From left treactares) night (products) OC At

Complete the following reactions

Co,Et Br NaOEt co,Et Br T 1. HNO, H,SO, 1.2 Brz FeBry 2. Fe, H0 3. OH 4. HNO, H,SO, Br Br Br Br HSO,

3. How should a temperature change affect the potential of a standard cell, or a cell in which Q=1? a. it should increase b. it should decrease c. it should stay the same 4. What happened to the voltage on when the red and black probes were swapped? a. doubled b. halved c. stayed the same d. changed sign

3. Suggest two different methods to synthesis 4methyl1heptyne

By titration, it is found that 43.1 mL of 0.180 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution.

Define, compare and contrast each of the proteins listed in Q2. How would you isolate each protein from the membrane Each protein should be released from the membrane using a unique set of conditions. Discuss what intramolecular or intermolecular interactions are disrupted by each protein isolation method you proposed.

Under what condition Reflux used in for chemical reaction

In preparation of dibenalacetone fiom benzaldehyde What techniquen can be med to determine if the bensaldekyde has been aroxidized or not Indicate what you would obuerve as a positive test in each technique

In preparation of dibenzalacetone from benzaldehyde Give two techniques that can be used to purify partially airoxidized benzaldehyde. Indicate how each technique works in purifying benzaldehyde from its airoxidizad impurities.

4. How many grams of sodium azide are required to produce 275g of N2 O 426g O 856g O 957g 15g

3. How many grams of sodium metal will be produced from 140g of NaNa O 49.5g 02.15g O 42g O 99g

Given CH 3CO 2H(aq)H(aq) CH3CO 2 (aq) at 25C, Ka1.83 x 105. What is A G at 25C for a solution in which the initial concentrations are CH 3CO 2H 0 0.10 M H 106.4 x 108 M CH3CO 2 00.010 M a. 19.7 kJ b.19.7 kJ 6. 73.8 kJ d. 27.0 kJ e. 73.8 kJ

Iron II Ammonium Sulfate Nickel II Solution Half Reaction in anode Half Reaction in cathode Balanced cell reaction

How many kinds of chemically nonequivalent hydrogens are there in each of the following compounds CH, H,CCHCH,OH The number of chemically nonequivalent hydrogens is CH The number of chemically nonequivalent hydrogens is