Organic Chemistry Questions

Use the reaction below to answer the question PCI5 9 PC 3 g Cl g AH 67kJ mol 2 00000000 If the reaction is at equilibrium and the temperature of the reaction is increased what will happen O The amount of PCI5 will increase O The reaction will shift to the left The amount of PCI3 will decrease O More Cl will form O The amount of Cl2 will decrease

Chemistry Which will elute 1st in Cation exclusion chromatography 1 Thr Arg Asp Val Cys 2 Ala Glu Lys Trp Tyr

2 H CH3 CN CH CH NH HOH CH3CHO Acetaldimine intermediate in the above sequence can also be obtained by A Reduction of acetaldoxime in the presence of Na C H5 OH Your Answer B Oxidation of ethylamine in the presence of KMnQ Correct Answer Reduction of methyl isonitrile in the presence of LiAlH

Among the following which is the strongest base NaCN O NaNH2 O NaOCOCH 3

The oxidation of the Carbon atom is HCO 3 Group of answer choices 1 2 4 3

Br g Cl g 2 BrCl g Kc 7 0 If the composition of the reaction mixture at 400 K is BrC1 0 00653 M Br 0 00176 M and Cl 0 000323 M what is the reaction quotient Q Q reaction at 400 K How is the reaction quotient related to the equilibrium constant Ke for this reaction OQ Kc O Q Kc OQ Kc

Which is not something which will affect the equilibrium of a reversible reaction Pressure The size of the beaker a reaction is happening in The amount of energy being added to a reaction The amounts of reactants and Products

Among the following which is the strongest base NaCN NaNH O NaOCOCH 3 ONOCH

Use the method you learned previously to convert the following Convert 3 8 grams of H O into moles Molar mass of H O is 18 02 g mol 3 8 mol H2O V Convert 9 6 moles of NaOH into grams Molar mass of NaOH is 40 0 g mol

5 Sodium hypochlorite NaOCI is the active the molar mass of Ca OH ingredient in household bleach Determine the molar mass of sodium hypochlorite Molar Mass Problems Show all calculations for credit Include the unit g mol Box your answer O 11 NaBr 12 PbSO 13 Al OH 14 Na PO 10 Determine 15 NH CO

Dimensional Analysis 1 Unit Conversions Question 1 Complete the conversion indicated in the image 1 mile 5 280 feet and 60 minutes 1 hour Round up to two decimal places when necessary 5 05 1 3 mi hr ft to 2 min

1 PPOGIL Concept How can atoms be counted Why Consider the following equation for a chemical reaction 2 H O 2 H O This can be interpreted as two molecules of hydrogen and one molecule of oxygen combining to form two water molecules But how often do chemists limit their reactions to one or two molecules Usually a reaction is done with an unimaginable number of molecules How then do chemists know they have the right mix The molecules need to be quickly counted How do we count molecules The answer is the unit called the mole Weighing is often easier than counting Model 1 The Balanced Equation How can the coefficients in a chemical equation be interpreted Consider the reaction 1 CuCl 2 Ag 2 AgCl 1 Cu Key Questions 1 What are the coefficients for each of the following substances in the reaction

Ethanol HH I HIC C 0 HH H H H CI 4 F H 4 0 H 0 0 F F 436 kJ mol 431 kJ mol 567 kJ mol 391 kJ mol 201 kJ mol 463 kJ mol 146 kJ mol 155 kJ mol Average Bond Energies kJ mol 413 kJ mol 348 kJ mol 293 kJ mol 358 kJ mol 485 kJ mol C H C C C N C S CI CI 328 kJ mol 259 kJ mol 242 kJ mol C C C C C 0 0 0 C O C N N N N N CON H 614 kJ mol 839 kJ mol 799 kJ mol 495 kJ mol 1072 kJ mol 615 kJ mol 418 kJ mol 941 kJ mol 891 kJ mol

6 What is the reagent required to accomplish the following transformation OH A LIAIH B 1 Os04 2 NaHSO H O OH C RCO H H O HO D PCC CH Cl

Predict the product s of the following reaction IV I HBr 1 11 III IV all of these are products ROOR

22 List the following species in order of increasing radius Cl Cl Br Br a Cl Cl Br Br b Cl Cl Br Br c Br Br Cl CI d Br Br Cl CI

Predict the product s of the following reaction Br IV I Br 11 all of these are products 11 HBr ROOR Br Br E IV

Which of the following alcohols can give carboxylic acid by Jones oxidation O OH OH OH OH

Dimensional Analysis 1 Unit Conversions Question 2 Complete the conversion indicated in the image 1 meter 3 28 feet and 60 seconds 1 minute Round up to two decimal places when necessary 5 05 7 meters second to feet minute

A person uses 98 21mL of a 1 72M LiOH solution as a titrant to titrate a solution of HBr with an unknown concetration If the volume of of the HBr sample being titrated is 11 6mL what is the concentration molarity of the unknown solution Round to two decimal places

Which process will give a secondary alcohol but 2 ene hydroboration Benzaldehyde NaBH4 followed by H3O Propan 1 ol NaOH 7 mothed pron 2 and pomorsuration demorcuration

OOO Br 1 IV I 11 all of these are products HBr ROOR Br III Br IV

At a certain temperature the equilibrium constant for the chemical reaction shown is 2 29 x 10 3 At equilibrium the concentration of AB is 2 325 M the concentration of BC is 1 425 M and the concentration of AC is 0 100 M Calculate the concentration of B at equilibrium AB aq BC aq AC aq 2 B aq

Four function calculator allowed David Perez Dimensional Analysis 1 Unit Conversions Question 9 An average heart rate is 60 beats per minute How many beats is this per hour A student solves this problem with the work shown in the image Which choice below shows all the corrections needed Select one O heat 3600 seconds 3600 beats 60 beats minute 10 hr 60 minutes 3600 beats hr

8 Which is ane the product s of the following reaction CPBA CH Cl OH 1 HI TV A Only I and II 1 Only I and III C Only II and III D 1 II III

Question 37 Which element is a metalloid Al Au Ar

Use each of the terms below just once to complete the passage a immiscible d solution b liquid e miscible Air is a n 1 of oxygen gas dissolved in nitrogen gas and nitrogen is the 3 The oxygen in air is the 2 3 If one liquid is soluble in another liquid such as acetic acid in water the two liquids are 4 However if one liquid is insoluble in another the liquids are 5 The word used to fill in blank 1 is The word used to fill in blank 2 is The word used to fill in blank 3 is The word used to fill in blank 4 is The word used to fill in blank 5 is 1 c solvent f solute Choose the correct letter a f Choose the correct letter a f Choose the correct letter a f Choose the correct letter a f Choose the correct letter a f

Predict the product for the following reaction H NaBH4 CH3OH OH color of OH OH OH OH

How many significant figures are there in the following numbers 316 08 54 056 Group of answer choices 2 3 5 1

3 Name the following compounds a b Co NH H O CIBry

Draw one of the possible diastereomers of the molecule shown below Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers where applicable NH Draw a Diastereomer a Q I I I I I I

A person finds the pH of a solution is 13 What is true about the solution O None of these are true O The solution contains a lot of hydrogen ions O The solution contains a lot of free protons O The solution is acidic

1 elect one Dimensional Analysis 1 Unit Conversions Question 9 An average heart rate is 60 beats per minute How many beats is this per hour A student solves this problem with the work shown in the image Which choice below shows all the corrections needed 1 0 beat 3600 seconds 3600 beats hr heats minute 60 10 hr 60 minutes

Which of the following substances is a base NaCl O H O HCI OLIOH OHBr

A person finds the pH of a solution is 2 What is true about the solution The solution contains a lot of hydroxide ions The solution is neutral The solution contains a lot of OH The solution is basic None of these are true

A person fully reacts 57 0g of carbon with excess hydrogen gas How much energy in kilojoules is released by the reaction Use a negative number if energy is released and a positive number if energy is added Round to 2 Decimal Places 4C s 5H g C4H10 g AH 125 6 kJ mol

1 List the metals from strongest to weakest reducing agent Mg Cu Pb Zn

Which of the following is the best method to make n butylbenzene below CH3CH2 CH2 CH2 CI AICI3 CH3CH2 CH2 CH2 OH H2SO4 CH3CH2 CH CH2 H2SO4 CH3CH2 CH2 C O CI AICI3 then Zn Hg conc HCI Clemenssen

Why does a titration of an acid with a base used as a titrant result in a neutral solution

A person has a 3 91M NaOH solution If they measure out 9 87L of it how many moles will they have

QUESTION 12 In a titration of 20 00 mL of 0 645 M H2SO4 required for neutralization A 28 B 62 4 C 25 8 D 0 69 E 13 8 mL of a 0 932 M KOH solu

A person titrates 11 32mL of a nitric acid HNO3 solution with an unknown concentration If the person used 41 36mL of a 0 15M barium hydroxide Ba OH solution as a titrant what is the concentration molarity of the unknown HNO3 solution Round to two decimal places

A person wants to make 441mL of a 1 1M HCI solution What mass in grams of solid HCI would they need to make this solution

Question 36 What determines how strongly an atom attracts the electrons in a chemical bond electronegativity activation energy pH atomic mass

ensional Analysis 1 Unit Conversions Question 6 Complete the conversion indicated in the image 1 inch 2 54 centimeters Round to two decimal places when necessary 5 05 Enter answer below 5 5 centimeters to inches

A person forms 3 07mol of C4H10 according to the reaction below How much energy in kilojoules was released Use a negative number if energy is released and a positive number if energy is added Round to 2 Decimal Places AH 125 6 4C s 5H2 g C4H10 g kJ mol

Question 35 What is the oxidation number of Sulfur in Na2S O3 Remember all of the charges of a compound have to equal zero 0 1 4 6 2 Next

5 Starting from benzene propose a multi step synthesis for each of the following compounds 1 point each reaction and no partial credit Hit or miss A Br Br

What is the concentration M of 39 88 mL of an unknown NaOH solution if it required 46 08 mL of 0 6592 M HCI to neutralize A titration problem Write the reaction out first A 0 7617 B 2788 C 1211 D 1 313 E 1 211

Potential Energy A B C Reaction Coordinate D According to the potential energy diagram above which letter interval represents activation energy B and this PE diagram represents an exothermic reaction B and this PE diagram represents an endothermic reaction C and this PE diagram represents an endothermic reaction