The reason why the double bond of tetrachloroethene is undetectable in the bromine test for unsaturation is to be explained. Concept Introduction: Bromination leads to the addition reaction of alkenes or alkynes and also the formation of haloalkanes . This is used as a test for the detection of unsaturated compounds.

Question

Photochemical smog is formed in part by the action of light on nitrogen dioxide. The wavelength of radiation absorbed by NO2 in this reaction is 197 nm.(a) Draw the Lewis structure of NO2 and sketch its π molecular orbitals.(b) When 1.56 mJ of energy is absorbed by 3.0 L of air at 20 °C and 0.91 atm, all the NO2 molecules in this sample dissociate by the reaction shown. Assume that each absorbed photon leads to the dissociation (into NO and O) of one NO2 molecule. What is the proportion, in parts per million, of NO2 molecules in this sample? Assume that the sample behaves ideally.

Answer 1

Question

Chapter 8, Problem 41P

Interpretation Introduction

Interpretation:

The reason why the double bond of tetrachloroethene is undetectable in the bromine test for unsaturation is to be explained.

Concept Introduction:

Bromination leads to the addition reaction of alkenes or alkynes and also the formation of haloalkanes. This is used as a test for the detection of unsaturated compounds.

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Photochemical smog is formed in part by the action of light on nitrogen dioxide. The wavelength of radiation absorbed by NO2 in this reaction is 197 nm.(a) Draw the Lewis structure of NO2 and sketch its π molecular orbitals.(b) When 1.56 mJ of energy is absorbed by 3.0 L of air at 20 °C and 0.91 atm, all the NO2 molecules in this sample dissociate by the reaction shown. Assume that each absorbed photon leads to the dissociation (into NO and O) of one NO2 molecule. What is the proportion, in parts per million, of NO2 molecules in this sample? Assume that the sample behaves ideally.

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