According to rate law that is the concentrations or pressure of the reactants and products of constant parameters is called rate law. Concept introduction: Half-life: The time required for a sample to decay half of the initial quantity. It is considered as first-order chemical reaction and is independent of the amount of sample.

Question

The Concept of Aromaticity 21.15 State the number of 2p orbital electrons in each molecule or ion. (a) (b) (e) (f) (c) (d) (h) (i) DA (k) 21.16 Which of the molecules and ions given in Problem 21.15 are aromatic according to the Hückel criteria? Which, if planar, would be antiaromatic? 21.17 Which of the following structures are considered aromatic according to the Hückel criteria? ---0-0 (a) (b) (c) (d) (e) (h) H -H .8.0- 21.18 Which of the molecules and ions from Problem 21.17 have electrons donated by a heteroatom?

Answer 1

Question

Chapter 25.4, Problem 1CYU

a)

Interpretation Introduction

Interpretation: According to rate law that is the concentrations or pressure of the reactants and products of constant parameters is called rate law.

Concept introduction:

Half-life: The time required for a sample to decay half of the initial quantity. It is considered as first-order chemical reaction and is independent of the amount of sample.

b)

Interpretation Introduction

Interpretation:

The time required for a sample of tritium to decay to one eighth of its activity has to be calculated.

Concept introduction:

Half-life: The time required for a sample to decay half of the initial quantity. It is considered as first-order chemical reaction and is independent of the amount of sample.

According to rate law that is the concentrations or pressure of the reactants and products of constant parameters is called rate law.

c)

Interpretation Introduction

Interpretation:

The length of time necessary for the sample to decay to 1% of its original activity has to be estimated.

Concept introduction:

Half-life: The time required for a sample to decay half of the initial quantity. It is considered as first-order chemical reaction and is independent of the amount of sample.

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The Concept of Aromaticity 21.15 State the number of 2p orbital electrons in each molecule or ion. (a) (b) (e) (f) (c) (d) (h) (i) DA (k) 21.16 Which of the molecules and ions given in Problem 21.15 are aromatic according to the Hückel criteria? Which, if planar, would be antiaromatic? 21.17 Which of the following structures are considered aromatic according to the Hückel criteria? ---0-0 (a) (b) (c) (d) (e) (h) H -H .8.0- 21.18 Which of the molecules and ions from Problem 21.17 have electrons donated by a heteroatom?

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