Organic Chemistry Questions

Determine whether trans-1,2-dimethylcyclopentane contains a chiral center. How many different substituents do you count at atom #(2)? (To help yourself, draw trans-1,2-dimethylcyclopentane on a piece of papery

The correct statement regarding addition of sodium hydrogen sulphite to a carbonyl compound is (A) The attack happens by the negative charge on oxygen (B) The rate of addition is always greater for ketones than aldehydes (C) Bisulphite addition product cannot be hydrolysed in basic medium (D) It can be used as a method to purify and separate aldehyde

Which of the following statements is not true regarding SN2 reactions? The alkyl halide and nucleophile are both present in the transition state of an SN2 reaction. If the alkyl halide is chiral, the stereochemistry will be scrambled during the SN2 reaction. SN2 reactions work best with aprotic solvents. SN2 reactions are fastest with primary alkyl halides.

Does a reaction occur when aqueous solutions of magnesium nitrate and zinc sulfate are combined? yes no If a reaction does occur, write the net ionic equation.

Which of the following approaches would represent a high-yielding synthesis of 4-chloroheptane (without the formation of byproducts)? (a) reaction of HCI with cis-3-heptene (b) reaction of HCI with 3-heptyne (c) reaction of HCI with trans-3-heptene (d) reaction of 3-heptanol with SOCI₂ (e) none of (a), (b), (c) or (d)

StatementI: In bleaching powder oxidation state of Ca is +2. Statement II: In bleaching power, chlorine is present in both +1 and -1 oxidation states. Which of the following statement(s) is/are correct? Both statements are correct Both statements are incorrect Statement I is correct but statement II is incorrect Statement I is incorrect but statement II is correct

Consider the reaction between benzoic acid and aqueous sodium hydroxide. Which H is lost by the acid? the CO₂H H atom one of the five ring H atoms

Draw any diastereomer of (2R,3R)-2,3-dichloropentane. Be careful to indicate proper stereochemistry. Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars. The single bond is active by default. Show the appropriate stereochemistry by choosing the dashed or wedged buttons and then clicking a bond on the canvas.

MultiStep Synthesis Over the next 3 weeks, you will be conducting your own multi-step synthesis. You will be provided with cyclohexanol and all the reagents needed to make 1-butylcyclohexene. Part 1: plan your synthesis The order in which you conduct your reaction steps in incredibly important. Please devise your plan, send it to me and then come to lab ready to conduct the first reaction on week 1 (wednesday 02/16). Once your plan is approved, I will provide you with the experimental details for each step.

Sketch an energy diagram that shows a conformational analysis of 2,2-dimethylpropane. Does the shape of this energy diagram more closely resemble the shape of the energy diagram for ethane or for butane?

The animation starts with a roughly spherical collection of surfactant molecules, called a micelle, at the top. Which groups point into the center of the micelle? the nonpolar organic groups the ionic head groups

Which of the following objects are chiral? Check all that apply. a screw a remote control device a needle a mug with BOB written to one side of the handle a mug with MOM written to one side of the handle a mug with MOM written opposite the handle a chair a mug with BOB written opposite the handle

A 535.0-mL aliquot of 0.860 M aqueous potassium hydroxide is mixed with 535.0 mL of 0.860 M aqueous magnesium nitrate. a Write a balanced chemical equation for any reaction that occurs. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.)

The compound chromium(III) nitrate is a strong electrolyte. Write the reaction when solid chromium(III) nitrate is put into water. I

The compound iron (III) acetate is a strong electrolyte. Write the reaction when solid iron(III) acetate is put into water.

The compound sodium iodide is a strong electrolyte. Write the reaction when solid sodium iodide is put into water. Include states of matter in your answer.

In the laboratory, a student dilutes 26.6 mL of a 8.57 M hydrochloric acid solution to a total volume of 125.0 mL. What is the concentration of the diluted solution?

BeCl₂ in vapour state above 1200 K exists as A and below 1200 K exists as B. Which of the following is incorrect about structures A and B. In structure A, the hybridization of Be is sp In structure B, the hybridization of Be is sp² In structure B, the hybridization of Be is sp³ The structure of A is linear

When natural gas (methane) burns, it reacts with oxygen in the air to form two new compounds, carbon dioxide and water. If 100 grams of methane and 100 grams of air are combined in a sealed container, and the mixture is allowed to react, what mass will be present in the container after the reaction takes place? The mass that will be present in the container is

Many elements combine with hydrogen(valence = 1) to give compounds called hydrides. Use the position of an element in the periodic table to deduce its valence. Write formulas for these hydrides without using subscripts, for example XH3. If no hydride forms, write "none". What is the formula of the hydride formed by neon? What is the formula of the hydride formed by barium?

The compound barium nitrite is a strong electrolyte. Write the reaction when solid barium nitrite is put into water.

Add the unshared (lone) electron pairs to the structure in the drawing window below. • Include all valence lone pairs in your answer. • Should you want to restart the exercise, the drop-down menu labeled == starting points == car used to redraw the starting molecule on the sketcher.

The compound nickel (II) sulfate is a strong electrolyte. Write the reaction when solid nickel (II) sulfate is put into water.

In the laboratory you dissolve 14.0 g of cobalt(II) bromide in a volumetric flask and add water to a total volume of 500 mL. What is the molarity of the solution? What is the concentration of the cobalt(II) cation? What is the concentration of the bromide anion?

Which is the correct condensed formula for difluoropropane? CH₂CHF2 CH₂CH₂CHF2 CH3CH₂F2 CH₂F2 CH3CH₂F

Match the function with the most likely compound: Refrigerant Scents and flavorings Steroidal hormone Antiseptic for surgery Component of butter and cell membranes Fuel

Inorganic compounds do not contain a carbon-carbon bond. Two types of intramolecular bonds can exist in different inorganic carbon compounds. These are lonic and metallic bonds lonic and hydrogen bonds Covalent and hydrogen bonds Covalent and ionic bonds

What is the ionization energy of the element whose electron configuration is [Ne]3s23p¹? Include the correct units and then Describe the general trend in ionization energy as the atomic number increases down a group and The lowest ionization energies tend to belong to which group?

For each of the following, write a thermochemical equation that includes an energy term within the equation. (a) The formation of 1 mol of copper(II) chloride from its elements releases 220.1 kJ of energy. (b) The energy absorbed when graphite is converted to diamond is 2.0 kJ/mol of graphite. (c) The decomposition of silver chloride into its elements requires 127.1 kJ/mol of silver chloride.

What is the name for this molecule: CH3CH₂CH₂CH₂CH₂CH₂NH₂ propylamine heptyl amine pentylamine hexyl amine

The elementary reaction 2 H₂O(g) 2 H₂(g) + O₂(g) proceeds at a certain temperature until the partial pressures of H₂O, H₂, and O₂ reach 0.075 bar, 0.0040 bar, and 0.0045 bar, respectively. What is the value of the equilibrium constant at this temperature? K =

For the following reaction, 7.99 grams of benzene (C6H6) are allowed to react with 12.2 grams of oxygen gas. benzene (C6H6)(1) + oxygen (g) → carbon dioxide(g) + water(g) What is the maximum amount of carbon dioxide that can be formed? What is the FORMULA for the limiting reagent? What amount of the excess reagent remains after the reaction is complete? grams grams

For the following reaction, 7.99 grams of benzene (C6H6) are allowed to react with 12.2 grams of oxygen gas. benzene (C6H6) (1) + oxygen (g) → carbon dioxide(g) + water(g) What is the maximum amount of carbon dioxide that can be formed? ____ gram What is the FORMULA for the limiting reagent? What amount of the excess reagent remains after the reaction is complete? ____ grams

According to the following reaction, how many grams of water will be formed upon the complete reaction of 26.8 grams of hydrogen peroxide (H₂O₂)? hydrogen peroxide (H₂O₂) (aq) →→→water (1) + oxygen (g)

Draw the structural formula 2,6-dimethyl-4-(2-methylpropyl)decane. Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars. The single bond is active by default.

Where should the recovered p-toluic acid, p-tertbutylphenol and acetanilide be disposed of? A. They should be dissolved in water and washed down the sink. B. They should be dumped into the inorganic waste container in the hood. C. They should be disposed of in the organic waste container in the hood. D. They can be put into a sealed bottle and thrown in the trash.

Draw the structural formula of 1-bromo-2,2-dimethylpropane.

Ethanol, C₂H5OH, can be converted to acetic acid (the acid in vinegar), HC₂H3O2, by the action of sodium dichromate in aqueous sulfuric acid according to the following equation. 3C₂H5OH (aq) + 2Na₂Cr₂O7 (aq) + 8H₂SO4 (aq) + 3HC₂H3O2 (aq) + 2Cr₂(SO4)3 (aq) + 2Na₂SO4 (aq) + 11H₂O In one experiment, 24.5 g of C₂H5OH, 86.1 g of Na₂Cr₂O7, and an excess of sulfuric acid were mixed, and 26.6 g of acetic acid (HC₂H30₂) was isolated. Calculate the theoretical yields of HC₂H3O2.

Draw the Newman projection of hexane along the C3-C4 bond of the gauche conformer. Review the Newman projection of butane along the C2-C3 bond in the gauche conformer (Question 3). Does the amount to steric strain differ in the guache conformer of hexane compared the gauche conformer of butane? Explain

Propose an efficient synthesis for the following transformation: A reaction shows Ethynylcyclopentane with SMILES string of C#CC1CCCC1 forming 1-Cyclopentylacetone with SMILES string of CC(=O)CC1CCCC1. The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagent(s) in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. A. Mel B. H₂, Lindlar's catalyst C. NaNH2 D. 1) MeMgBr 2) H3O+ E. 1) O3, 2) H2O F. 1) R₂BH 2) H₂O₂, NaOH G. 1) EtMgBr 2) H3O+ H. H₂O, H₂SO4, HgSO4 I. Na₂Cr₂O7, H₂SO4, H₂O

Draw the structural formula of trans-1,3-dimethylcyclohexane in the chair conformation.

The bond-line structure of the compound has a SMILES string of CCCC(=O)CCC. The conversion of 1-butanol to the given compound can be performed with some combination of the reagents listed below. Give the necessary reagents in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. A. 1) CH3CH₂MgBr; 2) H3O+ B. conc. H₂SO4, heat C. H₂, Lindlar's cat. D. DMP or PCC E. 1) CH3CH₂CH₂MgBr; 2) H3O+ F. Na₂Cr₂O7, H₂SO4, H₂O

Consider the structure of tert-butyl cation below to answer the following question: -C+- (a) How many electrons are in the valence shell of the carbon bearing the positive charge? (b) Predict the bond angles about the central carbon? (c) What hybridization do you predict for the central carbon?

Draw the structural formula of sec-butyl tert-butyl ether.

The conversion of 1-butanol to the given compound can be performed with some combination of the reagents listed below. Give the necessary reagents in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. A. 1) MeMgBr; 2) H3O+ . B. 1) EtMgBr; 2) H3O+ C. DMP or PCC D. H₂, Lindlar's cat E. conc. H₂SO4, heat F. Na2Cr₂O7, H₂SO4, H₂O

In cumulene, what are the C-C-C and H-C-H bond angles, respectively?

Draw the structural formula of 1-methylcyclopentanol.

For the following reaction, 8.00 grams of benzene (C6H6) are allowed to react with 12.2 grams of oxygen gas. benzene (C6H6) (l) + oxygen (g) → carbon dioxide (g) + water (g) What is the maximum amount of carbon dioxide that can be formed? What is the FORMULA for the limiting reagent? What amount of the excess reagent remains after the reaction is complete?

Which intermolecular force is primarily responsible for the interactions among alkane molecules?

Mrs. McCormick has acute psychosis and is being treated with chlorpromazine hydrochloride (Thorazine) 15 mg four times per day. What is her total daily dose of Thorazine (in mg)?