General organic chemistry Questions and Answers

projection shown A a B b C C D d E e Newman Br H Bu

When HI and NaOH reacts the products formed will be A HNa aq and IOH aq B H g and Nal aq C H O I and Nal aq D H O I and IOH aq

following molecule A a B C D E b C d e D Br CH CH3 CH3 Br Br OH CH CH3 CH3 OH Br CH

Which structure represents the Newman projection shown A a B C b C D d E e

How many asymmetric carbons are present in the compound below N O H I OH

Select one a 1 a How many molecules are in 4 62 moles of nitric acid HNO De O 8 34x1024 molecules O6 02 x 1023 molecules 2 78 x 1024 molecules O 1 33x 1023 molecules

In the structure of the antibiotic Aztreonam shown below how many sp hybridized nitrogen atoms are there Type your response H N S N HO N O HZ O O

Are the following molecules chiral or achiral Match the molecules with the terms chiral and achiral PS answers need to be in numerical order e g chiral 1 before chiral 2 and achiral 1 before achiral 2 1 2 3 Drag and drop options on the right hand side to reorder and match with items on the left Reordering may cause items on the right hand side to swap positions CI Br K Br H 1 Br 2 Achiral 1 Chiral 2 Achiral 2 Chiral 1 CH Br H C CBr3 3 III III Br CH CH CH CH CH

How many chiral carbons does Betmathaosone have A 6 B 7 C 8 D 9 L

01 Dimensional Analysis 2 Molar Concepts Question 8 A piece of chalk CaCO has an initial mass of 43 5 grams The mass of the chalk decreased to 39 6 grams after a teacher used it Which of these is the closest value to the amount of chalk used Select one 1 3 90 moles 1 85 moles 0 0400 moles 0 400 moles 1 CEFNQUE isti S B C 6 Se

What is the absolute configuration R or S stereochemistry of the following molecule A B C D 2R 4R 2R 4S 2S 4R 2S 4S NH N

Which wedge and dash drawing correctly represents the chair conformation given A B C D 1 2 3 4 H Chair conformations H Molecule CH H CH H C CI H H CH CH CH h CH H H CI H B H C CI H H

Choose the base s that can deprotonate the following acid and favour the formation of the products A 1 Select all that apply B 2 C 3 O OH 4 NH Base H NH H Bas

What is happening in the diagram below if red spheres are protons and blue spheres are neutrons Deuterium Tritium Nuclear Fission O Chemical Reaction O Radioactive Decay OPhase Change Energy Helium Neutron BYJU S co

Consider all relevant resonance structures for the molecule shown How many relevant resonance structures have a positive charge on different carbon atoms Type your response O N

Dimensional Analysis 2 Molar Concepts Question 1 Which has more atoms 1 moles of barium atoms or 2 moles of carbon atoms Select one O O 1 moles of barium Ba atoms They cannot be compared 2 moles of carbon C atoms They have the same number of atoms

Select one alim 1 Dimensional Analysis 2 Molar Concepts Question 2 Which represents the greatest number of phosphorous atoms De 1 mole of phosphorous O1 gram of phosphorous O 1 molecule of phosphorous O1 atom of phosphorous

01 Dimensional Analysis 2 Molar Concepts Question 10 What is the molar mass of K CO3 Select one 1 O 99 g 138 g 106 g 67 g 1 2 310 Kay liimallimalia DE Beau 22 1211 110 19 zallerl

Explain how energy is involved with nuclear ission and fusion coses

Which of the following uses nuclear radiation Coal Powerplants Natural Gas CH4 powerplants Some Cancer Treatments The Haber Process The human digestive system

Which one is most stable compounds a I O O C III b ll

What process is happening in the diagram below if red spheres are neutrons and blue spheres are protons incident neutron Chemical Reaction Nuclear Fusion release of energy ONuclear Fission O Radioactive Decay O Phase Change incident neutron ALEEREEEE

Radioactive decay occurs because An atom is too old An atom is stable An atom s nucleus is unstable An atom has too many electrons The atom is too young 0 1 pts

Calculate the equilibrium constant for the chemical reaction given the equilibrium concentrations of the reactants and products in the table 2 AB aq 4 CD aq 2 AD aq 2 BD aq 4 C aq Substance AB CD AD BD C Equilibrium concentration 1 73 M 2 33 M 2 73 M 3 13 M 1 21 M

Pick one element from the first column and one element from the second column Explain whether or not they are likely to react Provide reasons why they would or would not react Be sure to include the word electron in your answer Column 1 Lithium Phosphorus Bromine Argon Sodium Column 2 Sulfur Carbon Neon Nitrogen Calcium

Which of the following reaction will not result the following product OH ATM Ph Me Et o 1 PhBr Mg Ether 2 H 0 1 EtMgBr Ether 2 H O 1 Hg OAc 2 H O 2 NaBH4 1 NaBH 2 H 0

Use the reaction below to answer the question PCI5 g PC 3 g Cl g AH 67kJ mol If the reaction is at equilibrium and a scientist decreases the pressure of the reaction container what will happen O The amount of PCI3 will decrease O The amount of Cl2 will decrease O The reaction will shift to the right O The reaction will shift to the left O The amount of PCI5 will Increase

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

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

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

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

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

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

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

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

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

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

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