Part A How important is this resonance structure to the overall structure of carbon dioxide? Explain.

Exercise 9.67

Part A

How important is this resonance structure to the overall structure of carbon dioxide? Explain.

Save your time - order a paper!

Get your paper written from scratch within the tight deadline. Our service is a reliable solution to all your troubles. Place an order on any task and we will take care of it. You won’t have to worry about the quality and deadlines

Order Paper Now

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Exercise 9.78

Ethanol is a possible fuel.

Part A

Use average bond energies to calculate Δ H rxn for the combustion of ethanol.
CH 3 CH 2 OH( g )+3O 2 ( g )→2CO 2 ( g )+3H 2 O( g )

ANSWER:

Δ H rxn =  Exercise 9.25

Part A

How do you determine the number of electrons that go into the Lewis structure of a molecule?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Part B

How do you determine the number of electrons that go into the Lewis structure of a polyatomic ion?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Exercise 9.38

 

Exercise 8.18

Part A

What are valence electrons?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Part B

Why are they important?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Exercise 8.22

   

Exercise 8.52

Part A

Name an element in the third period (row) of the periodic table with three valence electrons.

Express your answer as a chemical symbol.

ANSWER: Exercise 8.44

   

Exercise 10.82

Part A

Use the drawing of energy diagram for HCl to predict the bond order.

Express your answer using two significant figures.

ANSWER:

bond order =  Exercise 10.54

The valence electron configurations of several atoms are shown. How many bonds can each atom make without hybridization?

Part A

B2 s 2 2 p 1

ANSWER: Part B

Why is polarity important?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Exercise 10.48

 

Exercise 10.15

In Lewis theory, the two bonds in a double bond look identical. However, valence bond theory shows that they are not.

Part A

Describe a double bond according to valence bond theory.

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Part B

Explain why rotation is restricted about a double bond, but not about a single bond.

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Exercise 10.34

The following figures show several molecular geometries.

Part A

Give the number of total electron groups, the number of bonding groups, and the number of lone pairs for (a) geometry.

Express your answers as integers separated by commas.

ANSWER:

N total , N bonding , N lone =  Exercise 11.48

Part A

Explain how doping can increase the conductivity of a semiconductor. What is the difference between an n-type semiconductor and a p-type semiconductor?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Exercise 11.98

Determine the coordination number for each of the following structures.

Part A

Gold

ANSWER:

Coordination number =  Score Summary:

 

Exercise 11.90

The high-pressure phase diagram of ice is shown at the top of the next column. Notice that, under high pressure, ice can exist in several different solid forms .

Part A

What three forms of ice are present at the triple point marked O ?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

 

Part C

Explain your answers.

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Exercise 11.80

Part A

Calculate the amount of heat required to completely sublime 99.0 g of solid dry ice (CO 2 ) at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol .

ANSWER: Exercise 11.72

A 65.0 mL sample of water is heated to its boiling point.

Part A

How much heat (in kJ ) is required to vaporize it? (Assume a density of 1.00 g/mL .)

ANSWER: Exercise 11.68

 

Exercise 11.24

Part A

How is vapor pressure related to temperature? What happens to the vapor pressure of a substance when the temperature is increased? Decreased?

Check all that apply.

ANSWER:

Check all that apply. Exercise 11.19

Part A

Why is vaporization endothermic? Why is condensation exothermic?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

 

Exercise 11.17

Part A

What is capillary action? How does it depend on the relative strengths of adhesive and cohesive forces?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Exercise 11.62

Water (a) “wets” some surfaces and beads up on others. Mercury (b), in contrast, beads up on almost all surfaces.

Part A

Explain this difference.

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Exercise 11.63

 

Part E

For the following pair of compounds, pick the one with the higher vapor pressure at a given temperature: CH 3 OH or H 2 CO .

ANSWER:  

Exercise 11.54

Arrange the following in order of increasing boiling point.

Part A

H 2 S , H 2 Se , H 2 O

ANSWER: Exercise 11.58

Part A

For the following pair of compounds, pick the one with the higher vapor pressure at a given temperature: CH 4 or CH 3 Cl .

ANSWER: Part C

For the following pair of compounds, pick the one with the higher vapor pressure at a given temperature: CH 3 CH 2 CH 2 OH or CH 3 OH .

ANSWER: Part E

 

Exercise 11.9

Part A

Why are intermolecular forces generally much weaker than bonding forces?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

 

Exercise 6.8

Part A

What is a state function?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Part B

List some examples of state functions.

Check all that apply.

ANSWER:

Check all that apply. Exercise 6.42

A system absorbs 198 kJ of heat and the surroundings do 110 kJ of work on the system.

Part A

What is the change in internal energy of the system?

ANSWER:

Δ E =  Part B

Why does the reaction mixture undergo a decrease in temperature even though energy is absorbed?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

 

Exercise 6.74

Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction:
NH 4 NO 3 ( s )→NH +4 ( aq )+NO −3 ( aq )
In order to measure the enthalpy change for this reaction, 1.25 g of NH 4 NO 3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8 ∘ C and the final temperature (after the solid dissolves) is 21.9 ∘ C .

Part A

Calculate the change in enthalpy for the reaction in kilojoules per mole. (Use 1.0g/mL as the density of the solution and 4.18J/g ⋅ ∘ C as the specific heat capacity.)

Express your answer to two significant figures and include the appropriate units.

ANSWER:

Δ H rxn =  Exercise 7.8

Part A

What determines the color of a colored object?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Part B

This question will be shown after you complete previous question(s).

Exercise 7.12

Part A

Describe the photoelectric effect.

ANSWER:  

Exercise 7.42

Calculate the wavelength of each of the following frequencies of electromagnetic radiation.

Part A

104.8 MHz (typical frequency for FM radio broadcasting)

Express your answer using four significant figures.

ANSWER:

λ 1 =  Part B

What forces air into your lungs?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Exercise 5.30

The pressure on top of Mt. Everest averages about 235 mmHg .

Part A

Convert this pressure to torr .

ANSWER:

P =  Part B

How is the root mean square velocity of a gas related to its molar mass?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Exercise 5.22

Part A

Describe how the molecules in a perfume bottle travel from the bottle to your nose.

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Part B

What is mean free path?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Exercise 5.23

Part A

Explain the difference between diffusion and effusion.

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Part B

How is the effusion rate of a gas related to its molar mass?

ANSWER:

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3785 Character(s) remaining

 

Exercise 5.84

 

Exercise 5.90

A sample of N 2 O effuses from a container in 47 seconds.

Part A

How long would it take the same amount of gaseous I 2 to effuse from the same container under identical conditions?

Express your answer using two significant figures.

ANSWER:

t =  Exercise 5.94

Part A

Which postulate of the kinetic molecular theory breaks down under conditions of low temperature?

ANSWER: Exercise 5.146

Part A

Which of the following gases would you expect to deviate most from ideal behavior under conditions of low temperature: F 2 , Cl 2 , Br 2 ?

ANSWER: Score Summary: