General organic chemistry Questions and Answers

When the following flow chart of reaction is completed the major product is H PO4 A 1 B H THF H O NaOH 2 6 PCC 1 PhBr Mg ether 2 H O

Select one 1 Nitric oxide Oxygen If 60 0 g of nitric oxide reacts with 36 0 g of oxygen how much nitrogen dioxide is produced 1 O 96 0 g O 36 0 g O 60 0 g O 24 0 g Nitrogen dioxide

What is the major product for the following reaction a Hg OAc 2 EtOH b NaB H4 NaOH

What would be the major product of the following reaction sequence 1 Br hv 2 H O oo 00

Which of the following species is not a resonance form of the species A B

g 8 ino Balance these equations H FeCl2 s C H g NaHCO3 s NaOH aq 0 H O O2 g H O Na CO3 MgCl2 aq FeO s CO2 g V CO2 g NaCl aq HCl aq H O 1 V H O g Mg OH 2 s

GER 1 3 3 Al s Fe aq Al aq Fe s Half reaction Fe aq 2e Fe s Al aq 2e Al s Standard Reduction Potentia 0 771 1 660

2 What is the concentration of H3O in a solution with OH 1 10 12 M Is the solution acidic or basic

Ca OH 2 H SO4 CaSO4 H O SIC i Write the Balanced chemical equation Ca OH 2 H SO4 CaSO4 2 H O ii iii UN 2 add 2 Given 5 moles of Ca OH 2 how many moles of H O will be obtained Show work for full credit If you are provided with 50 g of Ca OH 2 how many grams of H O will you obtain Show each step of your calculation for credit 2 What is the concentration of H3O in a solution with OH 1 10 12 M Is the solution acidic or basic

Please answer the following questions in detail Points will be given for the steps shown where applicable just providing the final answer will not get any points 1 Given the equation Ca OH 2 H SO4 CaSO4 H O i ii iii Write the Balanced chemical equation Given 5 moles of Ca OH 2 how many moles of H O will be obtained Show work for full credit If you are provided with 50 g of Ca OH 2 how many grams of H O will you obtain Show each step of your calculation for credit 2 What is the concentration of H3O in a solution with OH 1 x 10 12 M Is the solution acidic or basic 3 A gas sample in a closed expandable container of initial volume 5 00 L was allowed to warm from 25 C w ma Hints Bl

5 Provide the answers for the following nuclear equations i 232U 92 ii in 22Th He 90 17N 16

4 What is the IUPAC name of this compounds ii Compound CH3 CH2 CH2 CH2 CH2 CH2 CH3 5 Provide the answers for the following nuclear equations i 232U B 92 iii CH CH CH CH CH CH CH CH 22Th He 90 17N Name

a HCO HC 3 3 Draw resonance structures for the following 15 points b CH CH einiog 01 elons gmot rons tool Cwmd I CH3 X CM3 1

Question 3 The diagram below represents the bright line spectra of four elements and a bright line spectrum produced by an unidentified element 1 02 Element L Element M What is the unidentified element 1 L 2 M 3 Element X Element Z Unidentified Element 500 Bright Line Spectra 600 500 600 Wavelength nm 3 X 4 Z 700 700

Given the potential energy diagram representing a reaction Potential Energy 1 1 2 2 01 2 2 I Which numbered interval represents the heat of reaction 3 4 Reaction Coordinate 3 3 4 4

A person reacts 10 74mol of carbon with 21 53mol of hydrogen gas How much energy is released during the reaction Use a negative number if energy is released and a positive number if energy is added 4C s 5H g C4H10 g AH 125 6 kJ mol

If 53 88mol of aluminum metal is reacted according to the reaction below and 9 73mol of aluminum oxide is recovered by the scientist what is the percent yield of the reaction Reaction 4Al s 302 g 2Al2O3 s

Select the structure corresponding methoxyethane O a O b OH CH CH CHCH CH CH CH 1 O C CH CH3 CH3 O Od CH CH CH C 4

How many carbon atoms are present in the following compound CI O a 6 O b 8 O c 7 O d 5

Identify the amide O a O b H C O c C HO H3C O d H3C H H C CH3 H N CH3 H N CH3 FO CH3

How many hydrogen atoms are present in the followinly compound O a 18 O b 16 O c 14 O d 12

Identify the alcohol O a C H Br O b C H5OH O c C H6O C O d C H8 PATU DUG

19 26 On the diagram shown below indicate with dotted lines the bonding between the enzyme a dipeptidase several amino acid residues in black and the substrate in blue that might occur to form the enzyme substrate complex What are the two types of bonding likely to occur O C H O H H H N C C R HH O H N N C C R 11

Identify the following compound CH3 H C O a carboxylic acid O b amine Oc amide O d aldehyde

entify the ester O a CH3CH CH CH COCH3 O b CH3CH CH CH COOCH3 O c CH CH CH CH COOH O d CH3CH CH CH CHO

Select the structure corresponding to the following name tertbutylisopropyl ether O a tox O b CH CH Oc CH C CH CH3 CH O O H OH CH CH CHCH CH CH CH

Name the following compound O a 1 pentyne O b 1 pentane O c 1 pentene O d 1 pentanol

name thei product of this reaction o C 0 Nao Et O 0

Answer the following question using the vocabulary will or will not Molecule A 1 form a hydrogen bond with molecule C and molecule D 2 form a hydrogen bond with itself H N 1 2 A 1 2 26 Answer the following question using the vocabulary will or will not Molecule A 1 form a hydrogen bond with molecule C and molecule D 2 form a hydrogen bond with molecule B H H b A B B C 27 Answer the following question using the vocabulary will or will not Molecule A 1 form a hydrogen bond with molecule B and molecule D 2 form a hydrogen bond with molecule C B D C D

22 What is the approximate value of the bond angle between atoms 11 10 9 11 O 5 Di 4 6 23 What is the approximate value of the bond angle between atoms 1 2 3 2 HN 2 5 11 24 What is the approximate value of the bond angle between atoms 2 1 5 3 NH 11 10 9 HN 4 6 10 7 9 8

1 Select one Nuclear Change 1 Question 2 One kilogram of uranium can produce as much energy as 16 000 kilograms of coal Why is the energy output for uranium so much greater than the energy output for coal Uranium undergoes fission and nuclear reactions give off more energy than chemical reactions O Uranium is more highly purified than coal O Uranium is extremely radioactive and gives off higher electromagnetic radiation than burning coal Uranium is a highly reactive metal that reacts violently with oxygen during combustion

Which of the following correctly balances this nuclear fission reaction In 235U 331 3 n 92 A 04Y 39 B C D 105 36 Kr 102Y 102 3Kr 36

nuclear fission reaction in 235U 331 3 n 92 Select one A 104Y 394 B C D OB OD OA 105 36 Kr 192Y 102y 39 102 Kr 364

Give the IUPAC name for the following compound fr select select select

O Na Ott e 2 CH Br 3 Na Oft 4 CH CH Br 5 H O 6 name product name final prods

react 3 1 cycloperity nexanoic name iupac acid with

De Select one 08 18 Nuclear Change 1 Question 8 Which of the following describes what occurs in the fission process 61 O A heavy nucleus is fragmented into lighter ones A neutron is split into a neutron and proton O Two light nuclei are combined into a heavier one O O A proton is split into three quarks A particle and anti particle appear in an area of high energy density

De Select one a De Nuclear Change 1 Question 10 What is true about strong nuclear force De O O It can happen between neutrons and protons two protons or two neutrons It has near infinite range It happens only between charged particles It is the force that keeps electrons in orbit around the nucleus

6 6 pts For each reaction predict what mechanism will account for the major product s formed and write SN1 SN2 or N R in the boxes provided Explanations or drawings are NOT required a b C OH xo HOCH 3 NaOH H O 7 9 pts Provide the missing reagents to complete the reactions below more than one step may be required Be sure to indicate the amount needed of any reagents if necessary OH

CHM 2010 Fall 2021 7 4 pts Determine the max number of possible stereoisomers based on the structure below show work for full credit O OH Br A 8 6 pts Utilizing the boxes below rank the following structures in order of increasing stability Max number of stereoisomers x B X C

Give the IUPAC name for the following compound select select STAL

1 Select one 1 Nuclear Change 1 Question 3 What is the missing product from the fusion of hydrogen H H ie 1 O H O H O He O H

For the given carboxylic acids which one is expected to be have higher pka Explain the reason based the concepts such as stability and equilibrium OH HO O OH

In the sun two hydrogen atoms fuse into one helium atom How does this process produce energy Select one 1 O Two hydrogen atoms have one more proton than a helium atom This proton becomes energy Two hydrogen atoms have two more electrons than a helium atom These electrons become energy A helium atom has slightly more mass than two hydrogen atoms This mass difference becomes energy A helium atom has slightly less mass than two hydrogen atoms The mass difference becomes energy

Suppose that for the reaction N g 3Cl 8 2NC13 8 it is determined that at a particular tempera ture the equilibrium concentrations are 0 000201 M anc N 0 000104 M Cl NC13 0 141 M Calculate the value of K for the reaction at this temperature

Consider the structure of diamond and graphite Graphite contains two types of distance between adjacent carbon atoms The distance between C atoms in same layer is x while the distance between C atoms in adjacent layers is y Diamond contains only one type of carbon carbon bond with a bond length of z Which of the following is correct Ox y z O z y x Oy x z Oy z x

1 Indicate all formal charges in the following molecules 12points CH CH3 H C CH C CH CH H3N CH H C o 0 CH3 H H C HC CH3 QH

3 3 Draw resonance structures for the following 15 points d e h CH3

Chemistry Of the following molecules contains the most energy CH3OH CH2O CO2 CH4 CHOH

14 What do the square brackets in the equilibrium expression indicate