Organic Chemistry Questions

1 LiAlH4 2 H O 3 NaH 4 CH CH Br

26 How many moles of oxygen are needed to produce 118g of carbon dioxide combustion of ethane C H6 C2H6 O2 CO H O

The structure for 2 3 dimethyl 2 pentene is shown below CH I CH CHCHCH CH CH3 O True O False

answer the questions interpret the following Lewis diagram for NO N 0 1 For the central nitrogen atom The number of non bonding electrons The number of bonding electrons The total number of electrons 2 The central nitrogen atom A obeys the octet rule B has less than an octet C has more than an octet

Which statement is not correct for Fischer projection OA A chiral carbon is at the intersection of horizontal and vertical lines B Rotation of 180 in plane doesn t change the molecule O C Rotation of 90 is allowed D Both A B Horizontal lines are forward

What is the molarity of a solution containing 0 42 mol o a 1 35 M b 0 74 M c 0 99 M d 0 24 M

o nonsuperimposable molecules are shown in the windows below ball stick labels Submit Answer ball stick 1 How many stereocenters are there in the molecule on the left 2 What is the total number of stereoisomers in the group that includes the molecule on the left 3 How many stereocenters are there in the molecule on the right 4 What is the total number of stereoisomers in the group that includes the molecule on the right 5 Are the two molecules enantiomers diastereomers constitutional isomers or not isomers of any kind labels Try Another Version 8 item attempts remaining

18 PCls has a trigonal bipyamidal shape Draw PCls in 3 dimensions and identify the 3 different angles associated with this structure 2 pts

What is the IUPAC name of the following compound

Enter the symbol for the element being described Enter only the elemental symbol not the name Note If there is more than one possible correct answer full credit will be given for any you choose Element in Period 3 Group 6A

C6H12O6 not one of the substances in the video is made up of all metalloids and therefore is a n high or low melting point metals ionic or covalent substance with a

X Incorrect Give an IUPAC systematic or common name for the following compound O ist acetyl acetate

g 1 HO 2 DIBAH 3 H O OH H 1 PHCOCI AICI 2 Na Cr O7 H SO4 H O 1 LAH 2 H O 3 H O 1 BH 3 THF 2 t BuOK 3 CH31

1 An atom undergoing a nuclear change involves a change in the atom O A number of electrons OB location of electrons C nucleus OD bonding tendencies

19 Identify 3 chiral centers on the following molecule with an 3 pts CI C H bua

8 Write the balanced nuclear equations for the Beta Alpha and Gamma decay of Radium 226 9 How are the mass number and atomic number of the nucleus affected by the loss of the following a beta particle b alpha particle c gamma particle

Supersaturated solutions are created when of a solute is dissolved in a solution than should be possible at a given temperature O less O 100 g O just the right amount O more

A solution was made by adding 37 50 grams of NaCl to 150 00 grams of water What is the mass percent of NaCl in the solution Your Answer

Rank the following in increasing keq hydration i 0 i FCH H A H C H B CICH O H H H

28 If you have 65 g of AuCl3 and 73 g of KOH what is the limiting reactant AuCl3 KOH Au OH 3 KCI

In a solution the dissolves in the this process is given a special name called The process of dissolving is called When water is the solve When two metals dissolve in each other the resulting product is called a n

Approximately how many grams of potassium chloride KCI can dissolve in 250 mL of water at 42 C a 100 g b 40 g 38 g 16 g c d

Question 1 What is the total number of moles in 80 grams of C H5CI formula mass of C H5CI 64 5 grams mole Hint use dimensional analysis to solve

24 Lead II chloride is combined with zinc nitrite resulting in lead II nitrite and zinc chloride

For a GAS dissolved in a liquid solution like soda water as the PRESSURE above the liquid increases the solubility of the gas relationship sa

Draw the full Lewis Structure for the compound cis 1 4 dichlorohept 2 ene

ed mechanism for the following write down adetailed mechani

Which of the following shows what forms when NaCl is dissolved in water and dissociates O NaCl s O Na Cl O NaCl ONa aq Cr aq

assify each of the following amines as 1 primary secondary or tertiary and as 2 aliphatic or aromatic CH N CH

3 71 OH 1 1 BH 3 2 H O H O 3 KMnO4 4 E OH H 5 z Ph Mg Br H D HO yo OH 224 O O Et

1 2 3 4 222 Rn 86 234Th 214 Pb 234 Tr I 234Th 90 220Ra 88 221 He He e

Write the curved arrow mechanism for these reactions that occur with carbocation rearrangement a Alkyl shift b Hydride shift H O H SO4 HCI CI x OH

Hydration of alkenes produced alcohols Hydration of alkynes produces an enol since you have an extra pi bond The enol tautomerizes to the keto form aldehyde or ketone The equilibrium is shifted to the keto form Keto enol tautomerism can be acid or base catalyzed depending on the conditions Write the curved arrow mechanism for the acid catalyzed keto enol tautomerism below Show all bonds and lone pairs involved in reactivity a The double bond acts as a Lewis base and donates a pair of electron to the proton from hydronium ion forming the more stable carbocation b The carbocation is stabilized by resonance of the lone pair of oxygen forming oxonium ion c Water deprotonates the oxonium ion yielding the ketone and recovering the catalyst H H3O

oil hydrogenation saturated fatty acid increases the degree of saturation in an oil triglycerides that are liquid at room temperature containing only single C C bonds a carboxylic acid with a long chain hydrocarbon group A

4 Write a complete stepwise mechanism for any TWO of the following You need to use curved arrows to show electron flow 10 points HCI X Q9 Heat NaOEt hant major minor EtOH NaBr H O

MeO C d OH OH CO Me CI H O H CI H CO Me CO Me

This is an example of a CH OC CH 14CH3 CHOC CH 14CH3 H OPOCH CH NH wax O glycerophospholipid steroid O fatty acid Otriacylglycerol

Write the curved arrow mechanism for each of the following a b c Br HOCH 3 OCH3 Br 1 BH 3 THF 2 H O2 NaOH H O 1 Hg OAc H O 2 NaBH4 enantiomer OH OH Reaction mechanism for reaction 2 is not clear Just change the mercury acetate in the compound for H

Now that you know how to assign oxidation numbers to atoms you can apply this knowledge to determine which compound is reduced and which compound is oxidized in a reaction that deals with non ionic compounds Consider again the following reaction CH4 g O2 g H O 1 CO2 g Determine the oxidation number on each of the compounds and then identify which reaction is the oxidation reaction in which reaction is the reduction reaction

Do the following for your first oil fat a Draw the skeletal structure of the predominant fatty acid on a piece of paper b Circle the hydrophilic portion of the fatty acid c Draw a square around the hydrophobic portion of the fatty acid

nces to access important values if need at is the name of the compound with the formula N O at is the name of the compound with the formula Fe CN 3 mat is the formula for sulfur dioxide hat is the formula for copper II chloride

6 valence electrons O S Se Te Po 3 nonmetals 1 metalloid 1 metal Reactive Most members form covalent sharing bonds compounds Must share 2 electrons with other elements to form compounds Family 18 or 8A Gases 8 valence electrons except He which only has 2 Happy because their outer electron shell is filled NON REACTIVE inert gases Nonmetals NO bonding with other elements He Ne Ar Kr Xe H

Reaction C3H8 g 5O2 g 3CO2 g 4H O g If a scientist completely reacts 382 1grams of propane C3H8 with excess oxygen gas O what mass of water is likely to form Round any atomic masses on the periodic table to one decimal place

Referring to the reaction coordinate diagram below the potential energy difference between which two points defines the activation energy for the second elementary step B Potential Energy A Select one O A and D O C and D O A and E OB and C O A and B D Reaction Coordinate E

Molecular nitrogen N2 g is a light non polar molecule with a low solubility in water However N2 g is modestly soluble in water Which type of solute solvent interaction is responsible for the dissolution of N in H O Select one O a ion ion interaction O b hydrogen bonding O c dipole dipole interaction O d hydrogen bonding O e London dispersion force

An experiment calls for using 500mL of 4 M hydrochloric acid HCI In the chemical stock room there is only a bottle of 10 M HCI present though How many milliliters of the 10M HCI would the student need to get in order to dilute it down to 4M and have a final volume of 500mL Hint M V M V Show your work 2 points

Calculate the Keq from the given concentrations all are gases C H 1 000 M 0 750 M C H Cl 0 000 M 0 250 M 2 C 1 000 M 0 500 M 0 500 M used First put in the chemicals then put in the numbers The concentrations for both Cl and HCI are squared due to their coefficients 1 X 1 start equilibrium Keq Keq a H30 J H S u bb 0 6000 b OH k HS1 C C H6 v 1 S 1 75 x 106 0X1CC 1 104 x 10 5 e Cl 2 HCI 0 000 M 0 500 M d C H4Cl2 m HX 0 0 750 n x w 1 11 x 108 x 5 5 x 10 dd 0 7100 ee 1 26 x 105 1 f HCI 8 H SO3 9 1 p 2 y 0 7000 ff 4 901 r 0 250 X h HC H302 z 1 60 x 10 5 gg 7 93 1 C H302 s 0 500 t 0 333 aa 1 143 x 105 il 4 957 hh 4 942

EGVERSENT A 2 5 x 10 M solution of HNO3 has a pH of C 4 3 a 2 5 Pitalark HEALIN Rainer b 3 6 d 10 4

aw structures above the names for each of the following 15 poin a trans 2 Pentene b cis 2 3 Dichloro 2 hexene 1 3 Dimethyl cyclohexene d E 4 Chloro 3 heptene

The total number of valence electrons in the ion BrO3 is