Organic Chemistry Questions

For this question fill in the missing products or reagents POCI Ph H O H SO4 Heat NH Name it

20 Which process is most likely nonspontaneous at 25 C and 1 atm A A rock climber repels down a cliff X VB C6H6 1 C6H aq C COz s CO g D A drop of water evaporates on a dry summer day y

The synthesis above used bromoethane but acetylene is the only allowed source of carbon atoms Using the reagents given identify a synthetic route for the production of bromoethane from acetylene H H 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 B H Lindlar s cat D NaNH Br E C H Pt F

important values it needed for this question student determines the manganese II content of a solution by first precipitating it as manganese II hydroxide and then decomposing the hydroxide to manganese II xide by heating How many grams of manganese II oxide should the student obtain if his solution contains 37 0 mL of 0 570 M manganese II nitrate g

0 Sample Furnace empirical formula H O absorber When 4 717 grams of a hydrocarbon CxHy were burned in a combustion analysis apparatus 14 80 grams of CO2 and 6 060 grams of H O were produced In a separate experiment the molar mass of the compound was found to be 28 05 g mol Determine the empirical formula and the molecular formula of the hydrocarbon Enter the elements in the order presented in the question molecular formula CO absorber

Solubility of Ionic Compounds Classify each of the compounds as soluble or not soluble chromium II acetate ammonium phosphate cobalt II sulfide

The percent by mass of aluminum in Al NO2 3 is

For the following reaction 4 29 grams of sulfur are mixed with excess carbon monoxide The reaction yields 7 29 grams of sulfur dioxide sulfur s carbon monoxide g sulfur dioxide g carbon s What is the theoretical yield of sulfur dioxide What is the percent yield of sulfur dioxide grams

Write out steps to show how each of the following pairs of compounds can be separated by an extraction procedure a b NH N HO and and

A local AM radio station broadcasts at an energy of 5 86 10 31 kJ photon Calculate the frequency at which it is broadcasting KHz Frequency 71 VUS 103 1

A 0 5359 g sample of a pure soluble chloride compound is dissolved in water and all of the chloride ion is precipitated as AgCl by the addition of an excess of silver nitrate The mass of the resulting AgCl is found to be 1 1269 g What is the mass percentage of chlorine in the original compound

Identify the following molecule 20 CH3 12 CH 21 18 17 H 2 3 REECHNO 1 FALCON 4 10 15 11 CH 19 6 H 13 14 8 7 H I 15 O a omega fatty acid O b steroids O c trans fat O d fatty acid 16

Attempt in Progress a plausible mechanism for the following transformation 1 34a Low HBr x

values if needed for this question How many moles of bromine trifluoride are needed to produce 8 74 L of fluorine gas according to the following reaction at 0 C and 1 atm bromine trifluoride g bromine g fluorine g moles bromine trifluoride

In the slowest rate determining step of the reaction mechanism for citrate synthase what is the role of the histidine OXC Oxaloacetate CH COO HC C SCA H CO 70XC CH HC C SCA Coo HO O Nucleophilic attack on oxaloacetate O Stabilize the enolate intermediate through hydrogen bonding O Hydrolysis of acetyl CoA O Induce a pKa shift in citrate 0

Write the mechanism for the reaction of a SECONDARY AMINE with an ACID CHLORIDE to generate an AMIDE and H C Include the structure and names of your choices and name the product formed

A chemical reaction is run in which 389 Joules of heat are generated and 684 Joules of work are done on the system Calculate the change in the internal energy of the chemical system AU Joules

Write the chemical formula of the following metal complexes or complex ions formula 0 EX name tetracyanocobaltate III dibromobis ethylenediamine zinc II

13 How would you accomplish the following conversion OH OH 8 points

Please help me understand the mechanism of this reaction of an amino group with acidic conditions and Dean Stark I will give thumbs up thank you so much in advance for your help n 8 points H N H Dean Stark a

1A H2A Li Be Na Mg 3B 4B 5B 6B 7B8B K Ca Sc Ti V Cr Mn Fe Co 3A B 1B 2B Al Si Ni Cu Zn Ga Use the References to access important values if needed for this quest 8A 4A 5A 6A 7A He CNO F Ne P S Cl Ar Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Rf Ha Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Using only the periodic table arrange the following elements in order of increasing atomic radius germanium calcium krypton bromine Smallest Largest Please answer this question according to the general rules you have learned regarding periodic trends DO NOT base your answer on tabulated values since exceptions may occur

An aqueous solution of calcium hydroxide is standardized by titration with a 0 147 M solution of hydrochloric acid If 23 6 mL of base are required to neutralize 23 4 mL of the acid what is the molarity of the calcium hydroxide solution M calcium hydroxide

12 7 Identify the reagents that you would use to accomplish each of the following transformations OH you Br OH b Br OH OH 60 d c

1 09 mol sample of argon gas at a temperature of 12 0 C is found to occupy a volume of 23 2 liters The pressure of this gas sample is Submit Answer Use the References to access important values if needed for this question Retry Entire Group 9 more group attempts remaining m

ant values if needed for this question In the laboratory a student finds that it takes 202 Joules to increase the temperature of 13 0 grams of gaseous neon from 20 5 to 36 6 degrees Celsius The specific heat of neon calculated from her data is J g C

If a balloon containing 3 0 L at 25 C is cooled to 54 C what is its new volume The pressure and the moles of gas remain constant L

Ba CH CO by measuring out 106 jumol of barium acetate into a 200 mL volumetric flask and filling the A chemist prepares a solution of barium acetate flask to the mark with water Calculate the concentration in mmol L of the chemist s barium acetate solution Round your answer to 3 significant digits

A 1 21 mol sample of CO2 gas is confined in a 30 1 liter container at 30 4 C If the temperature of the gas sample is increased to 52 1 C holding the volume constant the pressure will increase because Choose all that apply At higher temperatures molecules have higher average speeds With lower average speeds the molecules hit the walls of the container less often With higher average speeds on average the molecules hit the walls of the container with more force As the average speed increases the number of molecule wall collisions decreases

The following information is given for mercury at 1 atm Tb 357 00 C Tm 39 00 C Specific heat solid 0 1410 J g C Specific heat liquid 0 1390 J g C Use the References to access important values if needed for this question AHvap 357 00 C 295 6 J g AHfus 39 00 C 11 60 J g A 29 70 g sample of solid mercury is initially at 61 00 C If 600 0 J of heat are added to the sample at constant pressure P 1 atm which of the following is Select all that apply The sample is a solid O The sample is a liquid The sample is at a temperature of 39 00 C The sample is a solid in equilibrium with liquid

Sample Enter the elements in the order C H O empirical formula molecular formula Submit Answer Use the References to access important values if needed for this question A 6 752 gram sample of an organic compound containing C H and O is analyzed by combustion analysis and 10 07 grams of CO2 and 3 091 grams of H O are produced In a separate experiment the molar mass is found to be 118 1 g mol Determine the empirical formula and the molecular formula of the organic compound Furnace H O absorber Retry Entire Group 9 more group attempts remaining CO absorber

2 45 Predict the products for each of the following 1 0 2 DMS J 1 0 21 DVS 3 Excess LIAIH 4 1 0 b 3 Excess LIAIH 4 H 0

A chemist prepares a solution of silver 1 perchlorate AgCIO by measuring out 1 3 x 10 mol of silver I perchlorate into a 300 ml volumetric flask and filling the flask to the mark with water Calculate the concentration in mmol L of the chemist s silver 1 perchlorate solution Round your answer to 2 significant digits nol

to access important values if needed for this question ixture of argon and hydrogen gases in a 8 40 L flask at 48 C contains 9 93 grams of argon and 0 528 grams of hydrogen The partial pressure of hydrogen in the flask is atm and the total pressure in the flask is atm

tant values if needed for this question The following thermochemical equation is for the reaction of hydrogen peroxide 1 to form water I and oxygen g 2H O 1 2H O l O g AH 196 kJ How many grams of H O2 1 would have to react to produce 25 9 kJ of energy

A 10 0 g sample of a compound is found to contain 1 00 g carbon 0 840 g hydrogen and 8 16 g chlorine What is the compound s percent composition Select the correct answer below O 19 4 carbon 31 9 hydrogen 48 7 chlorine O 51 0 carbon 22 7 hydrogen 26 3 chlorine 1 00 carbon 0 840 hydrogen 8 16 chlorine 10 0 carbon 8 40 hydrogen 81 6 chlorine Ih

Solid carbon reacts with oxygen gas to produce carbon dioxide gas Write a balanced chemical equation for this reaction

12 38 Propose a mechanism for the following reaction Br OH Nah

problem 22 51 draw the organic products formed in each reaction Explain a e please 22 51 Draw the organic products formed in each reaction COOH c C6H5CN OH b CHCOCI SOCI N H excess 1 CH3CH CH MgBr 2 H O d CH3 2CHCOOH CH3CH CHOH CH3 NHCOCH3 H O TOH H SO4

3 Dave is looking at holiday brochures He wants a comfortable temperature and knows that this is about 264 15K NOTE 20 and 22 Celsius is the comfortable temperature Is the information correct Explain your answer

Which of the following best describes the relation between X and Y CH3 CH H C CI CI C H CH CH Y CH CH X A O Isomers B O Enantiomers c O Tautomers Tonomers H CH CH CH

What is the shape of trigonal planar from the side as explained in video a Triangle b Point c Line or Plane d Pyramid

eed explanations to why thats the answe lease 25 I and II are OCH3 Br X H HOH H 1 A enantiomers CHCH B diastereomers not isomeric OCH3 Br CH3 OH D identical E constitutional isomers

Show how to make the following compound K OH

Predict the major product of the following reaction BH r 01 11 O III CON 2006 OH hove H O H OH III IV

A mixture of nitrogen and argon gases at a total pressure of 705 mm Hg contains 2 23 grams of nitrogen and 6 62 grams of argon What is the partial pressure of each gas in the mixture PN PAr 11 11 mm Hg mm Hg

28 Which compound would show optical activity More than one of these B trans 1 4 Dimethylcycloheptane C cis 1 4 Dimethylcyclohexane D cis 1 4 Dimethylcycloheptane FY trans 1 4 Dimethylcyclohexane

12 44 Identify the reagents you would use to accomplish each of the following transformations OH b Idi OH OH 0 CH SERE

12 54 Propose an efficient synthesis for each of the followin transformations m C C 4 T

12 5 For each of the following pairs of alcohols identify the one that is more acidic and explain your choice c OH OH OH OH b 12 OH

Predict the major product of the following reaction Y 08 OC OM A ON SOCI C D Ph