(a) Interpretation: The reason as to why equation 21.13 is not applicable in the given case is to be explained. Concept introduction: A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

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Answer 1

Question

Chapter 21, Problem 21.57E

Interpretation Introduction

(a)

Interpretation:

The reason as to why equation 21.13 is not applicable in the given case is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

Interpretation Introduction

(b)

Interpretation:

The method used by a scientist to measure the lattice energy of He, Ne, Ar, and so on is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

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Calculating the pH at equivalence of a titration A chemist titrates 210.0 mL of a 0.1003 M hydrobromic acid (HBr) solution with 0.7550M KOH solution at 25 °C. Calculate the pH at equivalence. Round your answer to 2 decimal places. Note for advanced students: you may assume the total volume of the solution equals the initial volume plus the volume of KOH solution added. pH = ] ☑ o0o 18 Ar

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Using the conditions of spontaneity to deduce the signs of AH and AS Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions A This reaction is always spontaneous, but proceeds slower at temperatures above 120. °C. ΔΗ is (pick one) AS is (pick one) ΔΗ is (pick one) B This reaction is spontaneous except above 117. °C. AS is (pick one) ΔΗ is (pick one) This reaction is slower below 20. °C than C above. AS is |(pick one) ? 18 Ar 1

Answer 2

Question

Chapter 21, Problem 21.57E

Interpretation Introduction

(a)

Interpretation:

The reason as to why equation 21.13 is not applicable in the given case is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

Interpretation Introduction

(b)

Interpretation:

The method used by a scientist to measure the lattice energy of He, Ne, Ar, and so on is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

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Answer 3

Question

Chapter 21, Problem 21.57E

Interpretation Introduction

(a)

Interpretation:

The reason as to why equation 21.13 is not applicable in the given case is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

Interpretation Introduction

(b)

Interpretation:

The method used by a scientist to measure the lattice energy of He, Ne, Ar, and so on is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

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Answer 4

Question

Chapter 21, Problem 21.57E

Interpretation Introduction

(a)

Interpretation:

The reason as to why equation 21.13 is not applicable in the given case is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

Interpretation Introduction

(b)

Interpretation:

The method used by a scientist to measure the lattice energy of He, Ne, Ar, and so on is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

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Answer 5

Chapter 21, Problem 21.57E

Interpretation Introduction

(a)

Interpretation:

The reason as to why equation 21.13 is not applicable in the given case is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

Interpretation Introduction

(b)

Interpretation:

The method used by a scientist to measure the lattice energy of He, Ne, Ar, and so on is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

Answer 6

Chapter 21, Problem 21.57E

Interpretation Introduction

(a)

Interpretation:

The reason as to why equation 21.13 is not applicable in the given case is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

Answer 7

Chapter 21, Problem 21.57E

Interpretation Introduction

(a)

Interpretation:

The reason as to why equation 21.13 is not applicable in the given case is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The method used by a scientist to measure the lattice energy of He, Ne, Ar, and so on is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The method used by a scientist to measure the lattice energy of He, Ne, Ar, and so on is to be explained.

Concept introduction:

A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 21 - Prob. 21.1E Ch. 21 - Boron nitride, BN, is a very hard material, harder...Ch. 21 - Prob. 21.3E Ch. 21 - Prob. 21.4E Ch. 21 - Figure 21.35 shows a unit cell of diamond....Ch. 21 - Prob. 21.6E Ch. 21 - How many different unit cells can a crystal have...Ch. 21 - Prob. 21.8E Ch. 21 - Prob. 21.9E Ch. 21 - Prob. 21.10E

Solution Summary: The author explains why equation 21.13 is not applicable in the given case. The equation is based on the repulsion and attraction forces between the oppositely charged ions.

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