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PROBLEMS FOR PRACTICE

1. What is the energy in kcal of one mole of photons of 2573 A wavelength?

2. Calculate the energy of one photon of light of 2450 A wavelength. Will it be able to dissociate a bond in a diatomic molecules which absorbs this photon and has a bond energy equal to 95 kcal per mole?
Planck’s constant (ft) = 6.626 • 10*27 erg s molecule*1 Velocity of light (c) = 3 • 1010 cm sql

Avogadro’s number (N) = 6.02 • 1023
flint: Calculate the energy of the photon. If this energy is greater than that required to break the bond (bond energy), dissociation of the bond will happen.

3. Calculate the value of an einstein of energy in electronvolts for a radiation of 3 • 101S sql
frequency.

4. Calculate the value of the einstein corresponding to radiation of 6000 A wavelength.

5. Find the value of an einstein of energy for radiation of 4240 A wavelength.

PROBLEMS FOR PRACTICE

1. When gaseous HI is irradiated with radiation of 2350 A wavelength, it is observed that 1.85 • 10*2 mole decomposes per 1000 cal of radiant energy absorbed. Calculate the quantum efficiency of the reaction
[Ans. 1.9]

2. A certain system absorbs 3.0 • 1016 quanta of light per second. On irradiation for 20 minutes,
0.002 mole of the reactant was found to have reacted. Calculate the quantum efficiency of the process.
[Ans. 0.669]

It is time to introduce yourself to the instructor and the other students in the course. Please answer the following questions. Use full sentences and proper sentence structure for all discussion assignments.

1. What is your favorite word?

2. What is your least favorite word?

3. What one thing do you like about your life?

4. What one thing do you not like about your life?

5. What profession would you like to attempt?

6. What profession would you never attempt?

7. What is your favorite TV show?

8. What three words describe you?

9. Why did you decide to take an online course?

Conflict theorists often look at social stratification in society. Describe two different situations or examples of stratification that you have witnessed in your own life. For example, where do you see different levels of wealth or power in society or have you witnessed acts of discrimination that illustrate differing levels of power?

Class-public speaking

Think about your activities and hobbies—music, dance, athletics, games, and so on—and identify teachers, coaches, and other mentors whose feedback helped you improve. How would you describe the helpful criticism they offered? Discuss the way they phrased their criticism, and recall how you reacted, both when you first heard their comments and later. From your discussion, draw conclusions about what you can do as a listener to provide good feedback and how, as a speaker, you can learn from the feedback you receive from peers.

How do you plan to balance your own schedule during your first semester of college?

Discuss the difference between categorical frequency distribution and grouped frequency distribution using examples.

Calculate the molar mass of water (H2O) by adding up the atomic masses of hydrogen (H) and oxygen (O) atoms. Remember to consider the number of atoms in the molecule when calculating the molar mass.

Solve the following integral: ∫(2x^3 + 5x^2 - 3x + 4) dx

Remember to use the power rule for integration and follow the steps to find the antiderivative of the function.

Balance the following chemical equation: 

Fe + O2 -> Fe2O3

What would you say to someone who has a great balance in their schedule at college?

Discussion:Race,Ethnicity,and identity

1 .How do you identify yourself relative to race, ethnicity and/or culture? Make sure to refer back to the definitions within the module. 

2.Is race, ethnicity and/or culture an important part of how you identify yourself?
Why or why not? 

3.How do you feel about these labels? Do you think labels accurately reflect identity?  

4.What other social markers make up your identity (i.e. age, gender, religion, geography, etc.--only share what you feel comfortable sharing)?

Imagine I gave you an airplane ticket that leaves tomorrow for anywhere in the world. Answer the following questions in 1 paragraph, and make sure your sentences match the tenses of the questions.

1) Where will you go?

2) What will you be doing while you are on the airplane?

3) What time does your flight leave tomorrow?

4) When are you arriving at your destination?

5) By the time you come back to HCMC, what will you have done during your trip?

Write a paragraph about the picture as follows. Make sure to write in normal paragraph form (don't separate or identify sentences).

Sentence 1: Introduce the subject of the picture

Sentence 2: Use the passive voice to describe something where we don't know who performed an action in the picture, or it is not important.

Sentence 3: Use active voice to describe something showing who/what did the action

Sentence 4: Use the passive voice to describe something where we know who did the action in the picture but don't identify them

Sentence 5: Concluding sentence