Chemistry concepts and calculations
117302 questions • Page 2070 / 2347
Why is option c the correct answer and not option a? H-C-C-C-C C-C-C-CC-H Nonane
Why is option c the correct answer and not option a? H-C-C-C-C C-C-C-CC-H Nonane 2.34 rifluoropentane Consider the molecules represented above and the data in the table below. Com…
Why is option four the correct answer and how would you solve this problem? Ques
Why is option four the correct answer and how would you solve this problem? Question 1 0/1 pts The observed reactivity trend in SN1, SN2, E1, and E2 reactions, for a given alkyl g…
Why is orange II dye bright orange? (As compared to most everything else you hav
Why is orange II dye bright orange? (As compared to most everything else you have worked with in lab which are white solids or clear colorless liquids) The ionic Na+ O- bond in th…
Why is phosphoric acid preferred for the conversion of cyclohexanol to cyclohexa
Why is phosphoric acid preferred for the conversion of cyclohexanol to cyclohexane? In the formation of 1-bromobutane the leaving group attacks from the right side of the leaving …
Why is potassium hydrogen phthalate (KHP) (KHC8H4O4, MM= 204.227 g/mol) so widel
Why is potassium hydrogen phthalate (KHP) (KHC8H4O4, MM= 204.227 g/mol) so widely used as a primary standard in acid-base titrations? Select all that apply. php?id 4057476 Jump to…
Why is the Bond Energy Cl-Cl smaller than C-C??? Solution bond energy (in kJ/mol
Why is the Bond Energy Cl-Cl smaller than C-C???
Why is the Major Organic product of (z)-3-methylhex-3-ene + HBr, 3-bromo-3-methy
Why is the Major Organic product of (z)-3-methylhex-3-ene + HBr, 3-bromo-3-methylhexane? During the reaction, the H from the HBr bonds to the alkene and brakes the pi bond, so th…
Why is the actual van\'t Hoff factor for a strong electrolyte not necessarily eq
Why is the actual van't Hoff factor for a strong electrolyte not necessarily equal to the expected van't Hoff factor? Sometimes ions will associate with one another in solution, w…
Why is the answer 1-bromopropane and not dipropylether? I\'m confused why the nm
Why is the answer 1-bromopropane and not dipropylether? I'm confused why the nmr for dipropylether has a signal at about 0.9ppm compared to 1-bromopropane which has a signal at 1.…
Why is the answer 1-bromopropane and not dipropylether? I\'m confused why the nm
Why is the answer 1-bromopropane and not dipropylether? I'm confused why the nmr for dipropylether has a signal at about 0.9ppm compared to 1-bromopropane which has a signal at 1.…
Why is the answer B? It was also noticed that a coenzyme molecule containing a h
Why is the answer B? It was also noticed that a coenzyme molecule containing a hydroxylOH) group binds to the mutated protein in approximately the same location as the original se…
Why is the dipole moment of SO2 1.63 D, but that of CO2 is 0 D O so2 is symmetri
Why is the dipole moment of SO2 1.63 D, but that of CO2 is 0 D O so2 is symmetrical, whereas Co2 is not. Asymmetrical molecules always have a dipole moment of 0 D. co2 is symmetri…
Why is the energy cycle different from many other Earth cycles? It describes the
Why is the energy cycle different from many other Earth cycles? It describes the movement of energy through the system, rather than the movement of materials. It lends toward self…
Why is the following statement not correct? In any spontaneous process, the entr
Why is the following statement not correct? In any spontaneous process, the entropy of a system must increase. Why is the following statement not correct? In any spontaneous proce…
Why is the ionization energy of Cl lower than F, but higher than that of S? Matc
Why is the ionization energy of Cl lower than F, but higher than that of S? Match the words in the left column to the appropriate blanks in the sentences on the right. Make certai…
Why is the methoxy group (-OCH_3) such a good ortho, para-director? Because it s
Why is the methoxy group (-OCH_3) such a good ortho, para-director? Because it sterically hinders the meta position. Because it adds electron density to the ortho & para posit…
Why is the methoxy group (-OCH_3) such a good ortho, para-director? Because it s
Why is the methoxy group (-OCH_3) such a good ortho, para-director? Because it sterically hinders the meta position. Because it adds electron density to the ortho & para posit…
Why is the molar solubility of silver chloride lower in an aqueous solution of s
Why is the molar solubility of silver chloride lower in an aqueous solution of sodium chloride than in pure water? because silver ions and sodium ions form a completely insoluble …
Why is the pKa value of protonated hydroxylamine (6.0) so much lower than the pK
Why is the pKa value of protonated hydroxylamine (6.0) so much lower than the pKa value of a protonated primary amine such as protonated methylamine (10.7)? The presence of the OH…
Why is the shape of the fluorescence emission spectrum unaffected by a change in
Why is the shape of the fluorescence emission spectrum unaffected by a change in excitation wavelength? How does the emission intensity vary as the excitation wavelength is change…
Why is the size of a cation less than the size of the atom it is related to? a.
Why is the size of a cation less than the size of the atom it is related to? a. The cation has more protons b. The cation has more electrons c. Filled s-orbitals shield more than …
Why is the slope of the line when crystallization is occuring in a solution not
Why is the slope of the line when crystallization is occuring in a solution not zero? Its one of the following choices: As heat is being removed from the system the temeprature wi…
Why is the state of Florida particularly likely to experience sinkholes? It has
Why is the state of Florida particularly likely to experience sinkholes? It has mostly fossil aquifers it has mostly artesian wells corrosive nature of seawater it is underlain wi…
Why is the time complexity of this code O(x*n*m)? Is this code\'s time complexit
Why is the time complexity of this code O(x*n*m)? Is this code's time complexity asymptotically tight? Why? #include<conio.h> #include<iostream> using namespace std; i…
Why is the value of E_a for a spontaneous reaction less than the E_a value for t
Why is the value of E_a for a spontaneous reaction less than the E_a value for the same reaction running in reverse? The delta H is negative for the forward reaction, so the activ…
Why is there no weak or strong mobile phase in size-exclusion chromatography? O
Why is there no weak or strong mobile phase in size-exclusion chromatography? O based on the extent to which the analytes penetrate the pores of O charged surface of the sfationar…
Why is there suppose to be 2 Cl and 2 Ag, in the final equation, Ihave them mark
Why is there suppose to be 2 Cl and 2 Ag, in the final equation, Ihave them marked in red... The total question is here in Green... Write a balanced net ionic equation for theredu…
Why is uranium-235 able to undergo a chain reaction while many other nuclei cann
Why is uranium-235 able to undergo a chain reaction while many other nuclei cannot? a.The energy produced is enough to heat the remaining uranium-235 to the point of fission, init…
Why is uranium-235 able to undergo a chain reaction while many other nuclei cann
Why is uranium-235 able to undergo a chain reaction while many other nuclei cannot? a.The energy produced is enough to heat the remaining uranium-235 to the point of fission, init…
Why is water called \"the universal solvent\"? water com dissolve almost anythin
Why is water called "the universal solvent"? water com dissolve almost anything Consider what happens when 10 mL of 0.10 M HCl and 20 mL of 0.06 M Nao are combined. Write a balanc…
Why is water considered an unusual molecule? Question 1 options: No molecule of
Why is water considered an unusual molecule? Question 1 options: No molecule of similar molecular weight is a liquid at room temperature. No molecule of similar molecular weight h…
Why is water considered an unusual molecule? Question 1 options: No molecule of
Why is water considered an unusual molecule? Question 1 options: No molecule of similar molecular weight is a liquid at room temperature. No molecule of similar molecular weight h…
Why isn\'t continuing? and why isn\'t celsius working import javax.swing.JOption
Why isn't continuing? and why isn't celsius working import javax.swing.JOptionPane; import java.util.Scanner; public class lab_Exercise2_3 { public static void main(String[] ar…
Why isn\'t it necessary to weigh the amount of liquid initially put into the fla
Why isn't it necessary to weigh the amount of liquid initially put into the flask? Explain. A certain volatile hydrocarbon(binary compound of carbon and hydrogen) is found to be 9…
Why isn\'t the answer c)? I thought because there\'s a weak acid involved a stro
Why isn't the answer c)? I thought because there's a weak acid involved a strong base would create a better buffer. 9. Ascorbic acid (HAsc) has a K, value of 8.0 x 10-5. An aqueou…
Why lan Forsythe, a middle-aged college professor from Boston, was in the Swiss
Why lan Forsythe, a middle-aged college professor from Boston, was in the Swiss Alps studying astronomy during his sabbatical leave. He had been there for two days and planned to …
Why might an idea or hypothesis be discarded? A. If a politician disagrees with
Why might an idea or hypothesis be discarded? A. If a politician disagrees with it. B. If it is tested and the evidence does not support it. C. If evidence also supports another h…
Why might someone who is drunk have high blood lactate levels? Reducing equivale
Why might someone who is drunk have high blood lactate levels? Reducing equivalents inhibit the synthesis of lactic acid and increase the synthesis of acetaldehyde. High levels of…
Why might the melting point of the crystals obtained in this experiment be close
Why might the melting point of the crystals obtained in this experiment be close to but below one of the reference melting points and melt slowly over several degrees? Would you e…
Why must alkylation reactions be done in completely anhydrousconditions? also...
Why must alkylation reactions be done in completely anhydrousconditions? also....What alkene should be used to obtain4-bromo-4-methylheptane as the only product? 1. 2-methyl-3-hep…
Why must an electrochemical cell have an oxidation half-reaction and a reduction
Why must an electrochemical cell have an oxidation half-reaction and a reduction half-reaction? possible answers but please explain: The electrons from the oxidation must be used …
Why must chemical equations be balanced? Choose all that apply. Choose all that
Why must chemical equations be balanced? Choose all that apply. Choose all that apply. In a balanced chemical equation, the coefficients in front of each reactant and product allo…
Why must one allow the thermometer to cool after obtaining the temperature of th
Why must one allow the thermometer to cool after obtaining the temperature of the boiling water and before placing the thermometer in the coffee cup calorimeter? A. The thermomete…
Why must the definition of zero entropy include 0 K as a temperature? Because at
Why must the definition of zero entropy include 0 K as a temperature? Because at any lower temperature, atomic or molecular vibrational energy may induce some amount of disorder. …
Why must the definition of zero entropy include 0 K as a temperature? Because at
Why must the definition of zero entropy include 0 K as a temperature? Because at any higher temperature, atomic or molecular vibrational energy may induce some amount of disorder.…
Why must the definition of zero entropy include no more than 1 K as a temperatur
Why must the definition of zero entropy include no more than 1 K as a temperature? Because at any lower temperature, atomic or molecular vibrational energy may induce some amount …
Why must we use caution when using historical records as proxy data? a. Wasn\'t
Why must we use caution when using historical records as proxy data? a. Wasn't intended to be used as climate record b. May not be dependable c. Both a and b are correct. d. None …
Why must you remove the separatory funnel stopper prior to opening the stopcock
Why must you remove the separatory funnel stopper prior to opening the stopcock and draining out the lower layer? During your extraction, you become confused as to which layer is …
Why not get rid of all certificate authorities and all the special kind of SSL c
Why not get rid of all certificate authorities and all the special kind of SSL certificates there are (extended validation etc. etc.) and instead just require anyone who wanted SS…
Why not use 100% diethyl ether as the eluant in this experiment? What problem wi
Why not use 100% diethyl ether as the eluant in this experiment? What problem will ensue if the level of the developing liquid is higher than the applied spot in a TLC analysis? W…
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