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Organic Chemistry

Qualitative Observations of Organic Liquids

1) What do understand by the terms a) Empirical Formula b) isomerism and what conclusions can you draw from the following observations about the chemical nature of the organic liquid D? a) D (relative molecular mass 72 ) has the following persentage composition by mass: Carbon 66.7, hydrogen 11.1, oxygen 22.2 b) D gives an

Organic Chemistry and HNMR Spectrum

1. A proton that absorbs radio frequency radiation at higher field strength will appear _____ in a 1H NMR spectrum. a. at 0 ppm b. downfield (away from TMS) c. upfield (closer to TMS) d. at 7.27 ppm just like CDCl3 2. The carbonyl peak of benzaldehyde appears as a very strong and intense peak at 1703 cm^-1. Normally the

C-13 NMR and GC of 3-Pentanol and 2-Pentene

A) Why is GC not able to distinguish between the trans vs. cis-2-pentene products? b) Explain why the 3-pentanol 13C-NMR spectrum contains three peaks while the trans and cis-2-pentene spectra contain five peaks (note that 13C-NMR gives a peak for each unique carbon, i.e. identical carbons show up as the same peak).

Solvent for Industrial Processes

A solvent for an industrial process requires the use of phenol or benzene. Both are about the same in effectiveness for the process, and of course, gloves will be used when handling either solvent. As an environmental safety officer for the company, which one would you recommend the use of and why? Also what set-up would you rec

Evaporation and its Effects on PCP and Cresol and Evaporation Calculations

We are asked to explain the phenomena of how 1 gram of liquid water at 35 degrees C (as in a pond or lake) evaporating into an overlying air mass at a temp of 65 degrees C and a relative humidity of 50%. What actually causes the evaporation of water and how can this be calculated in this instance?? What is the vapor pressure

Fractional Distillation and Reflux Ratios

What is the significance of reflux ratio in fractional distillation? Also what exactly does the formula, Ya/Yb = Pa/Pb = PaNa/PbNb, mean in terms of fractional distillation?

Organic Chemistry and NMR

Tell how the attached NMR, MS data and Infrared spectroscopy support that my unknown liquid is ehtyl acetate. See attached file for full problem description.

Density and Identity of Carbon Tetrachloride

1. The mass of 5.00 mL carbon tetrachloride is 7.97g. What is the density of the carbon tetrachloride? 2. An unknown liquid is found to be insoluable in water, has a density of 0.73g/mL and a boiling point of 35degrees C. The most likely identity of the liquid is____?

Atomic Absorption

See attached file for full problem description. Analyze the data from McDonald Creek Site # 3 and 4.

Organic Chemistry

1. Draw structural diagrams and give the names for the isomers of pentane. 2. When 2-butene reacts with hydrogen chloride gas, only one product is detected, whereas when 1-butene reacts similarly, two products are usually found. Explain this. 3. Geometric isomers exist in the alkenes but not in the alkynes. Explain why.

NMR Tree Diagram

In this problem the H NMR spectrum of styrene oxide shows that protons 1, 2, and 3 all have different chemical shift values. Proton 2 is coupled to both proton 1 (J= 5.8 Hz) and proton 3 (J=2.5 Hz). Draw a scale tree diagram and your best rendering of the resulting peaks for proton 2. See attached file for full problem desc

Organic Chemistry

Calculate the molar mass of sucrose. How many mol sucrose did you start with in this lab? How many mol ethanol would you obtain if all the sucrose is converted? I used 25g sucrose in 150 ml.

Energy Eigenfunctions of a Particle

Find <px2> for the first three energy eigenfunctions of a particle in an infinite dimensional well. (Hint: You might want to use the energy eigenvalues to avoid a lot of detailed calculations.)

Isomers/VSEPR

Isomers/VSEPR Questions. 1. Diethyl ether and butanol are .............. isomers. 2. A non zero dipole moment is exhibited by............. 3. The bond angle in PH3 is............ 4. ......... has trigonal planar shape. See attached file for full problem description.

Butane Combustion and Developed Formulas

1) How many grams of CO2 can you obtain from the combustion of 280 g of butane? 2) Write the developed formula of the following compounds (they are in Spanish) a) 2Chlorine 2metil 1hexanol b) 3 hidroxipentanoico c) Etanoato de metilo d) Metal propel amina e) 3 hidroxi 1metil benceno 3) Assign the name and complete wi

Assign formal charges to each atom

Assign formal charges to each atom in the attached file. Cross out the configurations that are not reasonable, and provide an explanation (eg large charge, incomplete octet, octet exceeded).

Matching structures to descriptions

Match a structure from the attachment to: a. an octapeptide with a C-terminal valine. b. an amino acid in its zqitterionic form. c. a polypeptide which gives four fragments on treatment with chymotrypsin d. the product of an edman degradation e. a carboxyl-protected amino acid. f. a peptide coupling reagent 36. sm

Organic Chemistry Problems: Compound Relationships

What is the correct structure for D-glucopyranose? What is the relationship between the following compounds? a) anomers b) meso compounds c) enantiomers d) equivalent structures What is the relationship between the following compounds ? a) anomers b) meso compounds c) enantiomers d) equivalent structures

NMR and MS techniques

What are the advantages of NMR and MS write one compound which you can identify using each of these techniques.

CHM

(See attached file for full problem description) p_Ethyl aniline is treated with NaNO3 in HCl to generate the diazonium salt. For the first two, show what reagents are necessary to convert the salt to the products shown below. For the third, show what product is obtained. Synthesize the following compounds using the startin