(a) Interpretation: A solid that can dissolve in water and melts below 100° C needs to be classified as metallic, network covalent, ionic or molecular. Concept introduction: Solids in which constituent particles are covalent molecules which are held together by weak intermolecular forces are called molecular solids.

Question

What is the average mass of the 10 pennies? Report your value with correct significant figures. What is the error (uncertainty) associated with each mass measurement due to the equipment? What is the uncertainty associated with the average value? Note that the uncertainty of the balance will propagate throughout the calculation. What is the standard deviation of the 10 mass measurements? Explain the difference between the propagated uncertainty and the standard deviation. Which number would you use to describe the uncertainty in the measurement? Calculate the total mass of the pennies with associated uncertainty. Calculate the average density of a penny based on these data. Propagate the uncertainty values for both mass and volume in your calculations.

Answer 1

Question

Chapter 9, Problem 40QAP

Interpretation Introduction

(a)

Interpretation:

A solid that can dissolve in water and melts below 100° C needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Solids in which constituent particles are covalent molecules which are held together by weak intermolecular forces are called molecular solids.

Interpretation Introduction

(b)

Interpretation:

A solid which conducts electricity only when melted needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Ionic solids consist of cations and anions. They are held together by strong electrostatic forces between cations and anions.

Interpretation Introduction

(c)

Interpretation:

A solid that is insoluble in water and conducts electricity needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Metals, in which the structural units are electrons and cations, which may have charges of +1, +2 or +3.

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What is the average mass of the 10 pennies? Report your value with correct significant figures. What is the error (uncertainty) associated with each mass measurement due to the equipment? What is the uncertainty associated with the average value? Note that the uncertainty of the balance will propagate throughout the calculation. What is the standard deviation of the 10 mass measurements? Explain the difference between the propagated uncertainty and the standard deviation. Which number would you use to describe the uncertainty in the measurement? Calculate the total mass of the pennies with associated uncertainty. Calculate the average density of a penny based on these data. Propagate the uncertainty values for both mass and volume in your calculations.

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B 1 of 2 Additional problems in preparation to Midterm #1: 1.) How can the following compounds be prepared using Diels-Alder reaction: CH3 O CN (a) (b) CN CH3 2.) What is the missing reagent in the shown reaction? H3C + ? H3C H3C CN H3C ''CN (၁) H 3.) Write the products 1,2-addition and 1,4-addition of DBr to 1,3-cyclohexadiene. Remember, D is deuterium, a heavy isotope of hydrogen. It reacts exactly like hydrogen. 4.) In the shown reaction, which will be the kinetic product and which will be the thermodynamic product? H3C CI H3C HCI H3C + 5.) Which of the following molecules is aromatic? (a) (b) (c) H 6.) Which of the following molecules is aromatic? (a) (b) (c) 7.) Write the mechanism for the shown reaction. + Ха AICI 3 CI 8.) Suggest reagents that would convert benzene into the shown compounds. CI NO2 -8-6-6-8-a (a) (b) (c) (d) (e) (a) SO3H Br

Answer 2

Question

Chapter 9, Problem 40QAP

Interpretation Introduction

(a)

Interpretation:

A solid that can dissolve in water and melts below 100° C needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Solids in which constituent particles are covalent molecules which are held together by weak intermolecular forces are called molecular solids.

Interpretation Introduction

(b)

Interpretation:

A solid which conducts electricity only when melted needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Ionic solids consist of cations and anions. They are held together by strong electrostatic forces between cations and anions.

Interpretation Introduction

(c)

Interpretation:

A solid that is insoluble in water and conducts electricity needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Metals, in which the structural units are electrons and cations, which may have charges of +1, +2 or +3.

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Answer 3

Question

Chapter 9, Problem 40QAP

Interpretation Introduction

(a)

Interpretation:

A solid that can dissolve in water and melts below 100° C needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Solids in which constituent particles are covalent molecules which are held together by weak intermolecular forces are called molecular solids.

Interpretation Introduction

(b)

Interpretation:

A solid which conducts electricity only when melted needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Ionic solids consist of cations and anions. They are held together by strong electrostatic forces between cations and anions.

Interpretation Introduction

(c)

Interpretation:

A solid that is insoluble in water and conducts electricity needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Metals, in which the structural units are electrons and cations, which may have charges of +1, +2 or +3.

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Answer 4

Question

Chapter 9, Problem 40QAP

Interpretation Introduction

(a)

Interpretation:

A solid that can dissolve in water and melts below 100° C needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Solids in which constituent particles are covalent molecules which are held together by weak intermolecular forces are called molecular solids.

Interpretation Introduction

(b)

Interpretation:

A solid which conducts electricity only when melted needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Ionic solids consist of cations and anions. They are held together by strong electrostatic forces between cations and anions.

Interpretation Introduction

(c)

Interpretation:

A solid that is insoluble in water and conducts electricity needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Metals, in which the structural units are electrons and cations, which may have charges of +1, +2 or +3.

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Answer 5

Chapter 9, Problem 40QAP

Interpretation Introduction

(a)

Interpretation:

A solid that can dissolve in water and melts below 100° C needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Solids in which constituent particles are covalent molecules which are held together by weak intermolecular forces are called molecular solids.

Interpretation Introduction

(b)

Interpretation:

A solid which conducts electricity only when melted needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Ionic solids consist of cations and anions. They are held together by strong electrostatic forces between cations and anions.

Interpretation Introduction

(c)

Interpretation:

A solid that is insoluble in water and conducts electricity needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Metals, in which the structural units are electrons and cations, which may have charges of +1, +2 or +3.

Answer 6

Chapter 9, Problem 40QAP

Interpretation Introduction

(a)

Interpretation:

A solid that can dissolve in water and melts below 100° C needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Solids in which constituent particles are covalent molecules which are held together by weak intermolecular forces are called molecular solids.

Answer 7

Chapter 9, Problem 40QAP

Interpretation Introduction

(a)

Interpretation:

A solid that can dissolve in water and melts below 100° C needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Solids in which constituent particles are covalent molecules which are held together by weak intermolecular forces are called molecular solids.

Answer 8

Interpretation Introduction

(b)

Interpretation:

A solid which conducts electricity only when melted needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Ionic solids consist of cations and anions. They are held together by strong electrostatic forces between cations and anions.

Answer 9

Interpretation Introduction

(b)

Interpretation:

A solid which conducts electricity only when melted needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Ionic solids consist of cations and anions. They are held together by strong electrostatic forces between cations and anions.

Answer 10

Interpretation Introduction

(c)

Interpretation:

A solid that is insoluble in water and conducts electricity needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Metals, in which the structural units are electrons and cations, which may have charges of +1, +2 or +3.

Answer 11

Interpretation Introduction

(c)

Interpretation:

A solid that is insoluble in water and conducts electricity needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Metals, in which the structural units are electrons and cations, which may have charges of +1, +2 or +3.

Answer 12

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Answer 13

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Answer 23

Ch. 9 - Prob. 1QAP Ch. 9 - Prob. 2QAP Ch. 9 - The vapor pressure of I2(s) at 30C is 0.466 mm Hg....Ch. 9 - Prob. 4QAP Ch. 9 - Trichloroethane, C2H3Cl3 is used as a degreaser...Ch. 9 - p-Dichlorobenzene, C6H4Cl2, can be one of the...Ch. 9 - Prob. 7QAP Ch. 9 - Dichloromethane, CH2Cl2,is widely used as a...Ch. 9 - Prob. 9QAP Ch. 9 - Prob. 10QAP

Solution Summary: The author explains that solids that dissolve in water and melt below 100° C need to be classified as metallic, network covalent, ionic or molecular.

(b)

Interpretation:

A solid which conducts electricity only when melted needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Ionic solids consist of cations and anions. They are held together by strong electrostatic forces between cations and anions.

(c)

Interpretation:

A solid that is insoluble in water and conducts electricity needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Metals, in which the structural units are electrons and cations, which may have charges of +1, +2 or +3.

Chapter 9 Solutions

Solution Summary: The author explains that solids that dissolve in water and melt below 100° C need to be classified as metallic, network covalent, ionic or molecular.

(b) Interpretation: A solid which conducts electricity only when melted needs to be classified as metallic, network covalent, ionic or molecular. Concept introduction: Ionic solids consist of cations and anions. They are held together by strong electrostatic forces between cations and anions.

(c) Interpretation: A solid that is insoluble in water and conducts electricity needs to be classified as metallic, network covalent, ionic or molecular. Concept introduction: Metals, in which the structural units are electrons and cations, which may have charges of +1, +2 or +3.

Chapter 9 Solutions

(b)

Interpretation:

A solid which conducts electricity only when melted needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Ionic solids consist of cations and anions. They are held together by strong electrostatic forces between cations and anions.

(c)

Interpretation:

A solid that is insoluble in water and conducts electricity needs to be classified as metallic, network covalent, ionic or molecular.

Concept introduction:

Metals, in which the structural units are electrons and cations, which may have charges of +1, +2 or +3.