Organic Chemistry Questions

Problem 2 Draw a peptide bond between two amino acids a circle the carboxyl and amino group involved in bonding use red ink b circle OH and H that will be removed during peptide bond formation use blue ink c draw final structure of a peptide use green ink to indicate peptide bond 1 a b NH NH OH and HO NH

ing structure in an example of H N CHCCHCO CH3 O a protein O b dipeptide O c hydrocarbons d amino acid CH OH 0

The periodic table is organized by atomic number mass number valence electrons oxidation number

Question 15 What could be a pH of a strong acid 07 12 2 05

6 Draw a heating curve showing the energy required to raise the temperature of ice from 10 0 C to water at 50 Indicate on the graph potential and kinetic energy changes

CH H N CH COH CH structure in an example of 010 i NH C10 O a amino acid O b O c protein O d carboxyl acid hydrocarbons

Kevlar is a strong synthetic fiber used in bullet proof vests and body armor Kevlar is made by the condensation reaction betwe 1 4 phenylene diamine and terephthaloyl chloride Modify the monomers to create one repeat unit of the polymer O What other small molecule is produced in this reaction Give the formula of the small molecule produced

Determine the mass in grams of CO that are produced by the complete reaction of 10 49 grams of C6H12 cyclohexane according to the following combustion reaction C6H12 1 9 O g 6 CO g 6 H O g

Question 10 Sodium atoms potassium atoms and cesium atoms all have the same atomic radius first ionization energy total number of protons oxidation state

The compound XCI is classified as ionic if X represents the element Rb 1 H Br

CH3CH CH NH Mixture can contain A CH3CH CH OH B C D CH3CHCH3 OH Your Answer HNO Both A and B P Mixture

A solution has a H3O of 1 x 1072 M What is the OH of the solution

Question 8 Which answer lists elements in order of increasing atomic radius size F N B Ne Ne Ar Kr Xe l Li B N F Rb K Na Li

Chemistry which one has weak bases Cual de las siguientes solo contiene b debiles ICH3NH2 NH3 IV RbOH AqOH

Given the balanced equation below 4 Al s 2 O g 2 Al O3 s Which type of chemical equation is represented by the reaction synthesis double replacement O decomposition single replacement

Problem 1 Circle and name the following parts of an amino acid a amino groups use red ink b a carbon use blue ink c carboxyl group use green ink d R side chain use black ink H N HO NH OH HO NH CH3 of hoo NH OH NH NH HN HO NH CH3 NH NH OH NH OH

Question 14 Which substance can be decomposed by a chemical means oxygen hydrogen carbon dioxide carbon

2 Below is the formula for the line bond or compressed structure of the shapes of molecules called IUPAC please write in the form IUPAC name Molecule Form 2 4 dimethyl 1 3 siklopentadien Z 1 2 difluoro 1 trans 5 ethyl 2 octene hexene cis 1 4 dimetilsiklohekzani

Question 2 Which formula represents a compound 03 Li Cl LiOH

Classify each of the molecules below NH 1 amine O 2 amine O 3 amine O not an amine at all NH O 1 amine O 2 amine O 3 amine O not an amine at all O 1 amine O 2 amine O 3 amine N O not an amine at all

9 Calculate AH for the reaction CH4 g NH3 g HCN g 3 H g given 1 N 8 3 H g 2 NH3 g C s 2 H g CH g H g 2 C s N g 2 HCN g CH g NH3 g HCN g 3H 75 AH 91 8 kJ AH 74 9 kJ AH 270 3 kJ AH

PC15 8 H 2HC When 79 60 g of phosphorus pentachloride reacts with excess water what mass of hydrogen chloride wi produced If needed enter scientific notation with the e For example 1 44 107 would be entered as 1 44e7 Answer 8 HCI

What is the pH of a solution with a 4 19 x 10 M hydronium ion concentration

1 If AH 84 74 kJ for a chemical reaction that reaction O is exothermic O is exponential cannot occur O is endothermic

The vapor pressure of a pure liquid increases as the O average kinetic energy of the molecules in the liquid phase decreases intermolecular attractive forces increase O temperature of the liquid phase increases temperature of the liquid phase decreases

Given the equation at equilibrium N 3H 2NH3 According to Le Chatelier s Principle what would occur when excess H is added to the system equilibrium would shift to the right and N would increase equilibrium would shift to the left and N would decrease equilibrium would shift to the left and N would increase equilibrium would shift to the right and N would decrease

What predominate intermolecular force is in CO O dipole dipole London forces covalent bond hydrogen bonding

Question 7 What is the mass number of an element that has 6 protons 8 neutrons and 6 electrons 14 20 6 2 pts 12

O O 1 If AH 54 74 kJ for a chemical reaction that reaction cannot occur is exothermic is endothermic is exponential

Question 4 Name the following compound KNO3 Opotassium nitride Opotassium nitrate Ophosphorus nitrate Ophosphorus nitrate

Explain the rate of anchimeric assistance when Ar NO C6H4 and CH3C6H4 for the following m 3 HO H H

f the volume in a container at 2 5 atm is 4 0 L what is the volume if the pressure is ncreased to 3 5 atm 2 9 L 4 0 L 2 2 L 561

Design a synthesis of the target molecule shown from the starting materials given plus any other needed reagents You will need to use BOTH types of protecting groups we have learned about Show all synthetic steps including the product of each step No mechanism It will probably require at least 6 steps Br H

Mots come tut Tilmene In OUT Can we ad al What predominate intermolecular force is in NH3 Alone Fille Ohydrogen bonding London forces O covalent bond MARC AUX CHIGENTES dipole dipole

8 Calculate AH for the reaction 6 C s 3 H g CH I given 2 C6H 1 15 O g 12 CO g 6H O l C s O g CO g H g O g H O l AH 6399 kJ AH 394 kJ AH 237 kJ

Which of the noble gases should show the greatest deviation All deviate equally Rn Ar He None of these

1 Which alkane would have a CH3CH3 CH3CH CH CH3 CH

O dipole dipole O covalent bond London forces hydrogen bonding

Given the formula M V M V2 where M stands for Molarity and V stands for Volume Calculate the molarity of acidic HNO3 if 25mL of it is neutralized by 32 1mL of a 0 15M KOH base 0 117 M 0 15 M 0 3 M 0 193 M

What predominate intermolecular force is in CH3CH CH3 Ohydrogen bonding O covalent bond London forces dipole dipole

Which of the following instruments directly measures the pressure of a gas polarimeter spectrometer manometer gas chromatograph None of these measures pressure

The volume of 350 mL of gas at 25 C is decreased to 135 mL at constant pressure What is the fina temperature of the gas

Which of the following substances is an acid O H O O NaCl O HC H302 O NaOH O KOH

The normal boiling point occurs when the O temperature of the pure liquid equals the external temperature O vapor pressure of the liquid equals an external pressure of 10 atmospheres intermolecular forces within the liquid phase are broken O vapor pressure of a pure liquid equals an external pressure of one atmosphere

According to the kinetic molecular theory the pressure of a gas in a containe volume of the container decreases number of collisions with the container wall increases None of these number of moles of the gas increases temperature of the gas decreases Teas

Some assumptions from the kinetic molecular theory are listed below Which one is most frequently cited to explain diffusion of a gas Collisions of gas particles are elastic and total kinetic energy of the gas is constant None of these The average kinetic energy of gas particles is proportional to the Kelvin temperature The volume of the particles is negligible compared to the volume of the gas A gas consist of tiny particles moving in random straight line motion

Sodium chloride changing from a solid to a gas is an example of boiling Omelting evaporation sublimation

Which statement about real gases is true The mass of the gas particles is zero The behavior of real gases can be exactly predicted using the ideal gas law The volume of the gas particles is zero None of these Forces of attraction and repulsion exist between gas particles at close range

Write the equilibrium constant expression for the reaction A s 3B 1 2 C aq D aq in terms of A B C and D as needed Note that K which is sometimes symbolized as Keq denotes that the equilibrium constant is expressed using molar concentrations For this question Ke means the same thing as Keq

57 What is the intermediate of this reaction Br A C O Br B D Br Br Br Br