Organic Chemistry Questions

7- The best definition of a prosthetic group is that: a) It is a long chain of poly peptide bond b) It is the complete amino acid sequence of a protein c) It is the secondary structure of a protein d) It is the portion of the protein that does not contain amino acid e) None of the above

Which of these would be considered an example of vertical integration? Standard Oil controlling 90% of the oil industry The Industrial Workers of the World (IWW) being a union that was open to all workers, even unskilled immigrants Political machines providing immigrants with jobs in exchange for votes Carnegie Steel owning the mines that produced the iron it would make into steel, as well as owning the boats that brought the iron to the steel mills

For the following reaction, 6.09 grams of perchloric acid (HCIO4) are mixed with excess tetraphosphorus decaoxide. The reaction yields 1.86 grams of phosphoric acid. perchloric acid (HClO4) (aq) + tetraphosphorus decaoxide (s)-phosphoric acid (aq) + dichlorine heptaoxide (1) What is the theoretical yield of phosphoric acid ? What is the percent yield of phosphoric acid ?

2C6H5 Cl + C₂ HOCl3 → C14H9 Cl5 + H₂O In a government lab, 1167 g of chlorobenzene is reacted with 486 g of chloral. a. What mass of DDT is formed, assuming 100% yield? b. Which reactant is limiting? Which is in excess? Mass . c. What mass of the excess reactant is left over? d. If the actual yield of DDT is 288.0 g, what is the percent yield?

For the following reaction, 23.2 grams of sulfur dioxide are allowed to react with 9.16 grams of oxygen sulfur dioxide(g) + oxygen(g) →→→sulfur trioxide(g) What is the maximum mass of sulfur trioxide that can be formed? What is the FORMULA for the limiting reagent? What mass of the excess reagent remains after the reaction is complete?

For the following reaction, 9.93 grams of nitrogen monoxide are allowed to react with 8.91 grams of oxygen gas. nitrogen monoxide(g) + oxygen(g) → nitrogen dioxide(g) What is the maximum mass of nitrogen dioxide that can be formed? What is the FORMULA for the limiting reagent? What mass of the excess reagent remains after the reaction is complete?

Draw the expanded structural formula for 1,3-dichlorocyclopentane. An expanded structural formula shows all the atoms of the molecule and all the bonds between the atoms in the molecule.

Consider the common arrow types used in organic chemistry listed below. Ordered list A. nucleophilic attack by a single atom B. heterolytic o bond cleavage C. nucleophilic attack by a w bond D. bond dissociation E. bond formation Which of these types are the reverse of each other?

What direction (d or I; + or -) would you expect the enantiomer of naproxen to rotate plane-polarized light? (d). (-) (d), (+) (l). (+) (l). (-)

Four Fe²+ ions are key components of hemoglobin, the protein that transports oxygen in the blood. If you assume that these ions are 4Fe²+, how many protons and neutrons are present in each nucleus, and how many electrons are present in each ion? protons neutrons electrons

Give the name for each of the following compounds, which contain a polyatomic ions a. CuHPO4: b. LiClO₂: c. Pb(SO4)2:

What is the name of the compound with the formula MgSO3 ? What is the name of the compound with the formula KNO₂ ?

What is the name of the compound with the formula CO₂? What is the name of the compound with the formula NF3 ? What is the name of the compound with the formula N₂O ?

Which of the following statements is valid? 2-butene; enantiomers 2,4-dimethylhexane; superimposable mirror images 2-bromobutane; achiral molecule propene; center of asymmetry.

Classify the following as a heterogeneous mixture, homogeneous mixture (solution), or a pure substance: hot coffee with sugar (completely dissolved) A. heterogeneous mixture B. homogeneous mixture/solution C. pure substance

The structure below belongs to the class of organic compounds called.......and it's IUPAC name is CH3CH2CH2CCCH2CH3 A. Alkane; Dehydrogenated heptane B. Alkene; 4- Heptene C. Alkyne; 4- Heptyne D. Alkyne; 3- Heptyne E. Alkene; Hexene

The equation below represents the acid catalyzed ____ of ____ to form USE IUPAC NAMES ONLY CH2=CH-CH3 + H₂=====> CH3CH(OH)CH3 A. carboxylation; propyne; 1-propanol B. reduction; 2-propene; 1-propanol C. hydration; propene; 2-propanol D. hydration; propane; dimathylether E. hydrogenation; propene; 2-propanol

What is the name of the compound with the formula NH₂HCO3 ? What is the name of the compound with the formula NH NO₂ ? What is the name of the compound with the formula (NH4)3PO4?

Ethanol, CH3CH₂OH, has a pKa value of 15.9 while acetic acid, CH3COOH, has a pKa value of 4.74. This data indicates that ethanol is a stronger acid than acetic acid. the conjugate base of ethanol is a stronger base than that of acetic acid. the conjugate base of ethanol would not react with acetic acid. the ratio of acetic acid to its conjugate base is larger than that of ethanol

Which of the following objects contains at least one plane of symmetry? Hint 1. How to determine planes of symmetry wooden chair work glove a pair of scissors metal screw

When solid red phosphorus, P4, is burned in air, the phosphorus combines with oxygen, producing a choking cloud of tetraphosphorus decoxide. Choose the unbalanced chemical equation for this reaction. P3O2 (9)→ P4 (s) + O2(g) P4(s) + N2₂ (9)→ P4N10 (9) P4 (s) + O2(g) → P4O10 (9) P4(s) + H₂O(1)→ P₂O10 (9)

You were running GC experiments on your unknown as well as unknown + sample spikes. Your unknown had two components, but when you got to the last sample containing a "spike,"your syringe became clogged. Since you were in a hurry, you quickly borrowed a syringe from the neighboring instrument; however, you ended up with four peaks in your chromatogram! What is the easiest and fastest thing to do to finish your lab? Re-mix all of your samples and run all the chromatograms again. Re-run your last sample after rinsing the syringe with that sample. Run the sample on a different GC. Answers A and B Answers A and C Answers B and C

Liquid octane (CH₂(CH₂)6CH3) reacts with gaseous oxygen gas (O₂) to produce gaseous carbon dioxide (CO₂) and gaseous water (H₂O). If 102. g of carbon dioxide is produced from the reaction of 78.81 g of octane and 165,6 g of oxygen gas, calculate the percent yield of carbon dioxide. Round your answer to 3 significant figures. and

Which of the following is NOT an important consideration in planning a recrystallization of compound X in solvent Y: the solubility of X in solvent Y at the boiling point of Y the boiling point of Y the solubility of X in solvent Y at 0 °C h the molecular weight of X the solubility of known impurities in solvent Y

2-Bromobutane reacts faster than 2-chlorobutane in both the Nal/acetone test and the AgNO3/EtOH test because____ bromine is a smaller atom than chlorine, allowing for a faster reaction the conjugate of chloride has a lower pka than the conjugate of bromide chlorine is more electronegative than bromine bromine is a better leaving group

We saw in lab that although iodine is a much bigger atom than chlorine, iodine has a much lower conformational energy cost than chlorine as an axial substituent. What best explains this phenomenon? The very long carbon-iodine bond minimizes steric strain. The very long carbon-iodine bond minimizes torsional strain. The outermost electrons of iodine are much more dispersed and therefore strain energy is reduced. Olodine's heavier atomic weight allows it to reside further away from the chair structure.

In this lab you synthesized Methyl acetoacetate via a Claisen Condensation reaction, which is combining two carbonyl containing molecules in the presence of a base. What functional group(s) were present in these two carbonyl reactants needed for this reaction? Two esters Two aldehydes An ester and a ketone Two ketones

A gaseous system that is 160.0 K and with a pressure of 126.6 kPa, has its temperature changed to 267.6 K. What is the new pressure of the system? Do not include units in your answer, they are presumed to be kPa. Round your answer to the nearest hundredth.

Which of the following helps us to predict the effect of change in temperature on a reaction system? Select the correct answer below: Collision theory The ideal gas law Le Châtelier's principle The effects of changes in temperature on equilibrium reactions are entirely random and cannot be predicted.

Draw the following (in any format) and write the molecular formula: 4) 3-iodo-2-methylhexano- 5) 1,2-dichloroethane 6) 2-chloro-4-ethylnonane 7) 4-isopropyldecane 8) 2,2,4-tribromo-3-fluorooctane 9) 1,1-difluoro-3-methylcyclohexane 10) 1-ethylcyclobutane

Which statement about solutions is true? Select the correct answer below: The solute must be the same physical state as the solvent. A solution can have only one solute. A solution can have many solutes. Given enough time, the solute will separate from the solvent.

Consider the reaction below. According to the Bronsted-Lowry definition, what acts as the conjugate acid when the reaction proceeds in the forward direction? CN + H₂O = OH + HCN Select the correct answer below: CN OOH OHCN H₂O

A solution of a compound in water conducts electricity, turns litmus red, and has a sour taste. What compound might be in the solution? Select the correct answer below: NaHCO3 Mg(OH)2 C3H5(COOH)3 NH3

Carboxypeptidase A is an enzyme that cleaves on the amino side of any C-terminal amino acids except arginine, lysine, or proline. What would be the correct peptide fragments formed if Val-Ile-His-Thr-Arg was treated with Carboxypeptidase A? Val lle His Thr Arg Val lle His Thr-Arg Val-lle-His-Thr Arg Val-lle His-Thr Arg

Which of the following phenomona is characteristic of unstable nuclei as opposed to stable nuclei? Select the correct answer below: Radioactivity Multiple isotopes Chemical reactivity Atomic masses (in amu) unequal to the mass number of the isotope.

Alkanes: 1) Draw the skeletal/line formula for octane, cyclopropane, and pentane. 2) Write the molecular formula for octane, cyclopropane, and pentane. 3) Draw as many isomers as you can with the formula C6H12. Name all the structures.

Which of the following two compounds is a stronger base: Sodium hydrosulfide (NaSH) or sodium hydroxide (NaOH)? In 1-2 complete and concise sentences, explain your logic in making this assignment of base strength.

13. Select the statement that is most true regarding kinetic and thermodynamic enolates. a. kinetic enolates are formed with a higher energy of activation under irreversible conditions relative to thermodynamic enolates. b. kinetic enolates are formed with a higher energy of activation under reversible conditions relative to thermodynamic enolates. c. kinetic enolates are formed with a lower energy of activation under reversible conditions relative to thermodynamic enolates. d. kinetic enolates are formed with a lower energy of activation under irreversible conditions relative to thermodynamic enolates.

The composition of triglycerides is best described by which of the following statements? Triglycerides are composed of two unsaturated fatty acids and one saturated fatty acid linked to a glycerol backbone via éster bonds. All of these describe possible triglycerides. Triglycerides are composed of three saturated fatty acids linked to a glycerol backbone via ester bonds. Triglycerides are composed of three unsaturated fatty acids linked to a glycerol backbone via ester bonds. Triglycerides are composed of two saturated fatty acids and one unsaturated fatty acid linked to a glycerol backbone via ester bonds.

An ester of formula C7H1402 gives an alcohol and an acid when hydrolyzed. When the alcohol is isolated and oxidized, it forms a ketone. Which of these compounds could be the ester? b. sec-butyl propanoate d. tert-butyl propanoate a. isopropyl propanoate c. ethyl 2,2-dimethylpropanoate

For a certain reaction K is known to be 0.003. The reaction quotient was found to be 0.003 Which way will the reaction proceed? towards the products not enough info to know it is at equilbrium towards the reactants

What is the average rate of production of carbon dioxide for the system between 2.0 and 4.0 minutes, CH4(g)+2O2(g)->CO2(g)+2H₂O(g), if the concentration of carbon dioxide is 2.5 mol/L after 2.0 minutes and 7.2 mol/L after 4.0 minutes? 2.35 mol/(L'min) 1.18 mol/(L*min) 42.6 mol/(L*min) 0.426 mol/(L* min) 0.952 mol/(L' min)

Keep the test open while you are doing this question on a piece of paper. After you finish the test, submit a picture of your answer in the dropbox within 5 minutes of finishing A mixture of 9 moles of A, 10 moles of B, and 27 moles of C is placed in a one-liter container at a certain temperature. The reaction is allowed to reach equilibrium. The equilibrium constant K for the reaction is 10. A (g) + 2 B (g) <==> 3 C (g) + 5 D (s) a) Write the general equilibrium constant equation for this reaction b) Calculate Q. c) Will the reaction proceed left or right and why

Which one of the following ionic solids would be expected to have the largest lattice energy? AIP (aluminium phosphide) MgS (Magnesium sulfide) NaCl (Sodium chloride) KCI (Potassium chloride) RbCl (Rubidium chloride)

Which of the following is most likely a heavier stable nucleus? Select all that apply: A nucleus with a neutron:proton ratio of 1.05 A nucleus with a neutron:proton ratio of 1.49 The nucleus of Sb-123 A nucleus with a mass of 187 and an atomic number of 75

A concentrated weak acid is best described as which of the following? A solution with a low pH A solution where the concentration of undissociated acid particles is low compared to the concentration of hydronium ions A solution where the concentration of hydronium ions is large compared to the concentration of undissociated acid particles A solution with a high pH A solution where the concentration of undissociated acid particles is high and the relative quantity of hydronium ions is small

K is 7.7x10-15 for the reaction 2CO(g)=C(s) + CO2(g) At a certain time the following concentrations are measured. [CO]=0.034M [CO2]=3.6x10-17 Which way will the reaction proceed? not enough info to know towards the products towards the reactants it is at equilbrium

What product(s) are expected in the ethoxide-promoted ß-elimination reaction of 1-chloro-1-methylcyclohexane? Omit ions, salts, and ethanol from your response.

Consider this unbalanced equilibrium: N2(g) + H2(g) <====> NH3(g) + 94 kJ The equilibrium law expression for the balanced chemical equation would be:. [N₂][H₂]/[NH3] [NH3]²/[H₂][N₂] [NH3] / [H₂][N2] [NH3]²/[H₂]³[N₂] 2[NH3]2/3[H₂]³[N₂]

Which of the following statements is TRUE regarding chemical equilibrium? chemical equilibrium only apply to solutions chemical equilibrium only apply to gases increasing the temperature in an exothermic reaction shifts the equilibrium towards the side of the reactants at equilibrium, the rate of reaction from reactants to products and the reverse is zero