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Organic Chemistry

Unsaturated lipids in cephalin

1. What are the ingredients of a cephalin? 2. Which fatty acid is always unsaturated in a cephalin? Why? 3. What is the enzyme system used in the formation of the prostalandins and thromboxanes? 4. Would you expect sodium ions (Na+) to be able to pass easily into a cell through bi-layer membrane wall? Why or Why not?

Organic Chemistry: Spectroscopic and Chemical Tests

Please answer the following questions. 1. Using sketches, demonstrate why the addition of HCN to 2-butanone yields a racemic mixture of chiral products. Circle the chiral carbon in each product. 2. Describe spectroscopic or chemical tests to distinguish between the following pairs of compounds: a. 2-pentanone vs 2-pentano

Lipids - Methanol, Ethanol & 1-Propanol Reactions

Methanol, Ethanol, & 1-Propanol 1) How would you sketch these three alcohol molecules? 2) What is each of their polarity? 3) What differences might you expect in the comparative solubility of each of them in lipids? WHY??? 4) If you were to add 2 drops of sheep blood to each of these alcohols (about 1/3 of a small te

Organic Chemistry and Structural Properties

In the mass spectrum of butylbenzene, the base peak occurs at m/z a. 134 b. 119 c. 105 d. 91 The number of mono-bromination products of p-xylene is a. 1 b. 2 c. 3 d. 4 Which of the following compounds has the lowest boiling point? a. p-dichlorobenzene b. o-dichlorobenzene c. m-

Aromaticity and Hybridization

I need some help with answering these questions: (See attached file for full problem description and structural formulas) 1. Predict whether the molecule would be expected to show aromatic character or not. Explain your answer. 2. What is the hybridization of the nitrogen atom in sulfathiazole? 3. Assuming that the sulfur

Identifying an unknown hydrocarbon

Is it possible to identify what the hydrocarbon is with just knowing the volume of it (9.61 ml), the mass (7.669 g/ml), density (0.798 g/ml)? Under tensor lamp, in ambient light, and in dark light there was no color noticed. It smelled somewhat like gasoline maybe and was smoky as far as combustion characteristics. Boiling poin

Benzene as an Organic Solvent

Benzene is a organic solvent with the formula, CB6BHB6B. It boils at 80.1 C and melts at 5.5 C. Benzene's density is 0.88 gm/ml, its heat of vaporization is 20.0 KJoules per mole, its heat of fusion is 10.0 KJoules per mole, its heat capacity is 0.50 KJoules per mole-degree C for liquid benzene, 0.25 KJoules per mole-degree C fo

Isomeric Products Isolated from Free-radical Chlorination

Some isomeric products were isolated from the free-radical chlorination of (R)-sec-butyl chloride. a) Draw stereochemical structures of the 1,2-, 2,2, and 1,3- dichlorobutanes obtained in this way. Give the proper R/S specification of 1,2 and the 1,3-dichlorobutanes. b) Which of these fractions as isolated will be optically act

Organic Food and Organic Chemical

89. A) We often hear the terms organic, natural, and chemical in the media. Organic and natural are usually used to imply that a product is "healthy" and/or "environmentally friendly" while chemical often implies negative implications for health and for the environment. In your opinion, are these implications justified? Us

Specific Rotation of (-)-epinephrine/ and Calculation of enantiomeric excess

1. A solution of 0.5g (-)-epinephrine dissolved in 10mL of dilute HCl was placed in a 20-cm polarimeter tube. Its optical rotation in sodium line (light wavelenth) was -5.0 degrees at 25 degrees Celsius. What is the specific rotation of the (-)-epinephrine? 2. Calculate the enantiomeric excess (e.e.), a measure of optical p

AP Chemistry - cyclohexane

2. Consider the molecule cyclohexane, which contains only hydrogen and carbon atoms. a) When a sample is burned in oxygen, 4.822 g of CO(2) and 1.650g of H(2)O are obtained. What is its simplest formula? b) Calculate the mass percent of carbon and hydrogen in cyclohexene. c) How many grams of carbon would you obtain fro

Compounds of Reactions

Explain why compound A reacts 9000 times faster than compound B at 0 degrees, but the two compounds react at the same rate at 103 degrees.

Which of the following molecules has NO net molecular dipole?

1. Which of the following molecules has NO net molecular dipole? a. CH3OH b. CH2O c. CH3Cl d. H2C=CH2 2. Which of the following molecules can hydrogen bond to another of the same compound? a. CH3CH2OCH2CH3 b. CH3CH2COOCH3 c. (CH3CH2)2CHOH d. CH3CH2COCH2CH3 3. What term best describes the relationship betwe

2 alkyl group

Define what we mean by an alkyl group? Please answer in full. Thanks for your time.

Properties of alkanes

If gasoline is spilled into a lake, an oil slick floating on the surface forms rapidly. What properties of alkanes are responsible for such oil slicks?


Write a flow sheet to show the logical process in use of silver nitrate and sodium iodide reagent tests to determine whether an unknown alkyl is primary, secondary, or tertiary.

Molar solubility

Molar Solubility. Calculate the molar solubility of the following compounds from the Ksp values given. a) ksp=2.1 x 10-16 b) ksp= 2.5 x 10-39 a. Zn(OH)2 b. Fe(OH)3

Equation for complete combustion e.g. ethane and cyclopropane

My chemistry book asks the question: Write the balanced equation for the complete combustion of each of the following compounds: a. ethane, C2 H6 The book has the answer which reads: 2C2h6 + 7O2 I don't understand where the formula for 7 02 b. cyclopropane I understand the formula C3H10 but I do


Expain why dinotrogen, N2, is a very stable molecule, but ethyne, C2H2, is very reactive. Note that both molecules have triple bonds.

Drawing Organic Substances

I need help in learning how to draw organic substances. For example- Diethyl ether. As well, what is meant by drawing the isomer of the structural formula?