Wednesday
March 4, 2015

Posts by Stephanie


Total # Posts: 1,050

college chemistry
a) Is the reaction shown below spontaneous under standard conditions at 25⁰C? CH3OH (g) ----> CO (g) + 2H2 (g) b) Will this reaction be spontaneous at 25⁰C given the following amounts of materials? CH3OH at 1.20 atm CO at 0.080 atm H2 at 0.020 atm
April 28, 2010

college chemistry
Sodium chloride is added to water (at 25⁰C) until it is saturated. Calculate the Cl- concentration in such a solution. Useful data are provided below. ∆G⁰f (kJ/mole): NaCl (s) -384 Na+ (aq) -262 Cl- (aq) -131
April 28, 2010

college chemistry
Carbon monoxide is toxic because it bonds much more strongly to the iron in hemoglobin (Hgb) than does O2. Consider the following reactions and approximate free energy changes: Hgb + O2 ---> HgbO2 ∆G⁰ = -70 kJ Hgb + CO ---> HgbCO ∆G⁰ = -80 kJ ...
April 28, 2010

college chemistry
A zinc-copper battery is constructed as follows: Zn | Zn+2(0.10 M) || Cu+2 (2.50 M)| Cu The mass of each electrode is 200.0 g. Each half cell contains 1.00 liter of solution. a) Calculate the cell potential when this battery is first connected. b) Calculate the cell potential ...
April 28, 2010

college chemistry
Cadmium sulfide (CdS) is used in some semiconductor applications. It is possible to evision the dissolving of this slightly soluble substance as an oxidation-reduction reaction. Calculate the value of the solubility (Ksp) for CdS given the following standard reduction ...
April 28, 2010

college
A standard voltaic cell is constructed so that the overall cell reaction is 2Al+3(aq) + 3M(s) --> 3M+2(aq) + 2Al(s) where M is an unknown metal. If ∆G⁰= -411 kJ for the overall cell reaction, identify the metal used to construct the standard cell.
April 28, 2010

spanish
what colors do you associate with the following words and phases? el invierno, el verano, la primavera, el ortorio, los peces tropicales, el perro Osito, Rosario
April 27, 2010

physics
A siren mounted on the roof of a firehouse emits sound at a frequency of 900 Hz. A steady wind is blowing with a speed of 15 m/s. Take the speed of sound in calm air to be 343 m/s. (c) Firefighters are approaching the siren from various directions at 15.0 m/s. What frequency ...
April 19, 2010

9th grade
(5c-9)(5c+1)
April 17, 2010

Organic Chemistry
A student tried to dissolve 5.0 grams of impure acetanilide in 50 Ml of hot water. However was not able to get it to dissolve. Why not? What would you do to get it to dissolve??
April 14, 2010

chemistry
THANKS MATT! I'm in your class too! haha, this totally helped. haha
April 6, 2010

Math/Algebra
AlgebRA / MATH
March 30, 2010

Calculus
Find the derivative of y=cos(squarerootsin(tzn(pi*x)))
March 28, 2010

Physical Science
Consider the current-carrying wires in the figure. Both cases consist of long straight wires carrying a current I. In both cases, the wire is also bent in the shape of a circular loop of radius R. The only difference is in how the bending of the wire is done to create the ...
March 19, 2010

literature
during what part of bernice bobs her hair does bernice cut Marjories braids
March 17, 2010

math
give the prime factorization of 189
March 14, 2010

Physical Science
The frequency of circular motion for a charged particle moving around in the presence of a uniform magnetic field does not depend on ... a)The radius of the circle b)The mass of the particle c)The charge of the particle d)The magnitude of the magnetic field e)Actually, it ...
March 13, 2010

HISTORY
WHAT ARE GOOD REULTS OF WW1?
March 13, 2010

Physical Science
Two parallel transmission wires are laid between electrical towers. The distance between towers is 200 m, while the separation between the parallel wires is only 2.5 m. If the wires carry each a current of 1000 A, the magnitude of the force between the wires is closest to ... ...
March 10, 2010

Physical Science
A 9-Volt battery is used to charge a 280 mF capacitor over a 81 Ohms resistance. How long will it take for the capacitor to reach 75% of its maximum charge? What formula is relevant?
March 10, 2010

Writing
I need to SHOW DONT TELL for my essay but need help showing Mischievous, Please Help
March 7, 2010

social studies
i would use my textbook if i had one!
March 7, 2010

social studies
what positive changes did kublai bring to ching? i have a test tomorrow please help!
March 7, 2010

social studies
what made the mongols powerful conquerors?
March 7, 2010

algerbra
n = 14
March 2, 2010

Thesis statement
How do you start a thesis statement that discusses the use of metaphors, simile, imagery and symbolism in a text?
March 2, 2010

English
your welcome!:)
February 28, 2010

English
could change the second and to where.
February 28, 2010

English
The burglas climbed hastily out of the window, terrified that he'd be caught. He didn't notice the water-butt and eventually got stuck in it and he was caught by the passing policeman.
February 28, 2010

Ethics(Proofread)
Can you please prrof reread this paper for me? As you seen before I had to write about different ethnic groups and discrimination. Please let me know what you think. Thanks! Jews in America Jews in the United States have faced prejudice, segregation, and racism. From the time ...
February 28, 2010

3rd grade
Basic Literary Elements Chart Characters Setting Conflict Theme Protagonists: Time: Who is involved: Antagonist: Place: Type of conflict:
February 28, 2010

Ethics
I have a paper started for my ethics class, but I am not sure if it fits the "criteria" or not. I am supposed to write about an ethic group to which I belong. I decided to do White women. But then I am supposed to have how the group colonized or immigrated to the US...
February 28, 2010

ETH 125
I need to write an essay answering questions. I am having trouble finding any websites on the group that I have chose. Can anyone help me find a site or a couple to answer these following questions? Did the group face prejudice, segregation, racism or any combo of the three? ...
February 26, 2010

Trigonometry
Each base angle of an isosceles triangle measures 42°. The base is 14.6 feet long. A) Find the length of a leg of the triangle. Round to the nearest tenth of a foot.  B) Find the altitude of the triangle. Round to the nearest tenth of a foot.
February 26, 2010

Math
A blueprint for a house shows a bedroom being 5.5 inches wide. The scale used to create the blueprint is 0.50 in. = 1 ft. What is the actual width of the bedroom?
February 25, 2010

Science
I am having trouble finding anything to answer this question. Any help I would appreciate it! Describe Darwin's Theory of Natural Selection and indicate why species are able to adapt to changes in their enviroment. Be sure to include a discussion of how "survival of ...
February 24, 2010

college algebra
By setting up and solving a proportion involving x, find the value of x for the car that you have chosen. State the type of car, the mileage, and show both the set up of the proportion and the steps to solve. Include units with your answer. How would I do this problem? What ...
February 23, 2010

Government
The US has money is all i could come up with. But that isn't true since we are about 3+ Trillion dollars in deficit due to wars and many other things.
February 21, 2010

Government
Weigh the advantages and disadvantages of the current democratic system. In the chapter on the presidency, for example, you must determine the most and least important presidential power. I have some ideas like the pros are the checks and balances system that keep things equal...
February 21, 2010

Science
I just want to see what you all think. I had to write a paper on Malathion and the West Nile Virus. I also had to go by the following topics. Please let me know what you think of the paper. Thanks! Hazard Identification: A lot of people including but not limited to those that ...
February 21, 2010

Environmental Science
Does anyone know where I can find information on camparing the use of Malathion to the risk of contracting the West Nile Virus? I have to explain my vote and consider any relevant political, social and economical aspects. Just having trouble finding information, and following ...
February 20, 2010

ethinic
Thanks!
February 19, 2010

ethinic
I don't think this is totally a homework question, but maybe someone can help. I have to do a PowerPoint presentation soon and have to add speaker notes. Well I have PowerPoint 97....How can I add the speaker notes in that? I know how in 07 but I guess that don't help ...
February 19, 2010

ethics
What could you do to eliminate racial prejudice and stereotypes and reduce their damage? How does this sound for this question? About the only way I can think of helping stop some of the racism and stereotyping is to educate people mainly our children about other cultures and ...
February 18, 2010

Algebra
I am having such a hard time in this class. Hopefully someone here can help me to understand some of what they are trying to teach me. I have a problem here and have been working on it for about an hour now and I can not figure it out. I need to come up with an answer but I ...
February 15, 2010

internet
Your Microsoft/Powerpoint is a program that you can buy. If you are enrolled in a college, usually you can get it for a discount. This will be a program that is downloaded onto your computer. I hope this helps.
February 14, 2010

ethics
Just have a question if to if anyone can show me how to set up a APA citation reference and a in-text citation...... Also how to set up APA format..I read the directions and still get it wrong, so if anyone knows how to simplify it for me I would appreciate it!!!
February 13, 2010

math
Shouldnt this be rounded up to 111? Since the exact answer is 110.156 and you cant play 110.156 tournament, you would have to play either 110 or 111 tournaments. If you only played 110 you would not have exactly 1,000,000....
February 10, 2010

Math
How can we solve this using a Venn diagaram? 12 out of 1000 women at age forty who participate in routine screening have breast cancer. 880 out of 1000 women with breast cancer will get positive mammographies. 90 out of 1000 women without breast cancer will also get positive ...
February 8, 2010

Math - Venn Diagrams
How can we solve this using a Venn diagaram? 12 out of 1000 women at age forty who participate in routine screening have breast cancer. 880 out of 1000 women with breast cancer will get positive mammographies. 90 out of 1000 women without breast cancer will also get positive ...
February 8, 2010

statistics
At Guadalajara Airport, passengers must claim their luggage and then proceed to Customs. In the Customs area, each passenger will press a button that activates a modified stoplight. This light has only red and green bulbs. If the green light shows, the passenger is free to go...
January 25, 2010

College chemistry
a) is around 2.0 b) is zero, all the substance has vaporized at 25 degress there for none of it will be left as a liquid
January 23, 2010

Literary Analysis and Composition
exposition in the story A cub pilot
January 21, 2010

childcare
I need to know what's the right answer to introducing organized sports among young children is not recommended because
January 20, 2010

2nd grade
How many flat surfaces, vertices, & edges does a cylinder have??
January 19, 2010

science
how did the oceans formstion affect the atmosphere?
January 19, 2010

science
how do scientists think the ocean was formed?
January 19, 2010

science
how do volcanic out-gasses affect the atmosphere?
January 19, 2010

PHYSICS
Gerry, who weighs 500 newtons, is late for class. It takes her 7.5 seconds to run up two flights of stairs, a total height of 8.0 meters. How much power does Gerry expend in her run upstairs?
January 11, 2010

geometry
what is the length of the hypotenuse of the triangle ABC? round the answer to one decimal place.
January 5, 2010

Algebra
How do I find the answer to this question? (9x squared + 6x- 3)- (-5x squared + 8x-8)
January 4, 2010

Japanese
Does "Uchi de nani-go o hanashimasu ka" mean "What language do you speak at home?"
December 14, 2009

algebra
Part 1: Using the Library, web resources, and/or other materials, find the logarithmic formula that gives the pH of a substance. State what each variable in your equation represents. Find the pH of an acidic substance of your choice. Using this pH, show how to find the ...
December 11, 2009

principles of business
what should i do so my business can grow internally and externally?
December 10, 2009

Math - Probability
A developer can buy a piece of property that will produce a profit of $16,000 with probability .7, or a loss of $9000 with probability .3. What is the expected profit?
December 7, 2009

chemistry
how many atoms of CA is found in the mineral Hydroxyapatite( Ca5OH(PO4)3 How many atoms of H is found in the mineral Hydroxyapatite, How many atom of O in Hydroxyapatite, How many atom sof P, and has a molar mass mass of___________?
December 4, 2009

social studies
electorate
December 1, 2009

chemistry
1. the volume of an idea gas is 2.06L at standard temperature and pressure. Calculate the volume at 1.75 atm and 27CELCIUS. 2. Ethane, C2h6 has a molar heat of vaporization of 15kj/mole. How many kilojoules or energy are required to vaporize 5 g of ethane?
December 1, 2009

algebra
Pick a country of your choice that is experiencing population growth. Using the Library, web resources, and/or other materials to find the most recent population count of the country you have chosen and the population growth rate of that country. Use that growth rate to ...
November 30, 2009

Japanese
Chuujokujin desu. Namae wa Yon desu. It is Chinsese. It's name is Yon. Is that what those sentences mean in English?
November 18, 2009

math
how do u solve "why did zorna pour ketchup on her brothers hand?"
November 13, 2009

definition
what word is similar to the definition "to make significant" or "to make unique" ?
November 8, 2009

Math
x=arcsin(5/13) y=arccos(3/5) so find those calculations and plug it into cos(x+y) or in other words cos(x+y)=(arcsin(5/13)+arccos(3/5))
November 8, 2009

science
can you please try to explain this to me so i understand
November 3, 2009

science
what is the wavelength of radiation with a frequency of 1.50 times 10^13s-1? Does this radiationhave a longer or shorter wavelength than red light? also... What is the energy of a photon of microwave radiation with a frequency of 3.20 times 10^11 s-1?
November 3, 2009

2nd grade math
2 tens 1 one is right
November 3, 2009

physics
a ball is thrown upward. its initial verticle component of velocity is 10 m/s and its initial horizontal component of velocity is 2 m/s. what is the ball's speed 10 s later?
November 3, 2009

physics
a projectile launched horizontally hits the ground in .6 seconds. if it had been launched with a much lower speed in the same direction, it would have hit the ground in
November 1, 2009

statistics
Some college students collected data on the intensity of light at various depths in a lake. Here are their data: Depth (meters) Light intenisty (lumens) 5 168.00 6 120.42 7 86.31 8 61.87 9 44.34 10 31.78 11 22.78 Take the natural logarithm (ln) of the light intensity ...
October 31, 2009

Pre-Calculus
yeah part exams library go there Pre-Calculus exam
October 29, 2009

Japanese
How would I say my younger twin sister's name is Rachel in Japanese? Is it "Futago no imooto no namae wa Rachel desu"? And when I am saying there are so many people in my family, do I include myself in that count?
October 27, 2009

12th Grade Math
you should Pre-Calculus exams grade 12 exams joined week
October 27, 2009

Human Resources Management
Answer the following questions about a new employee training program for the position you selected for your final project: o Needs assessment: What types of issues might indicate a need for training? From what sources would these issues be identified? If you were a training ...
October 26, 2009

Japanese Question
What do these four sentences mean: 1. Kono hon wa anata no desu ka. 2. Enpitsu wa soko desu. 3. Soko wa enpitsu desu. 4. Koko wa anata no shashin desu.
October 24, 2009

Japanese
How do I write the following four sentences in romaji: 1. Is this book yours? 2. Your money is over there. 3. There is your pencil. 4. Here is your photo.
October 23, 2009

essay writing
amazing thing that cause the world to go round
October 8, 2009

MATH
The answer is 0
October 6, 2009

reading
how many words can you find with corp in them?
October 5, 2009

Math
Crunchy Corn Chips are packaged in bags labeled "net weight 10 ounces." In fact, the weight of a bag of Crunchy Corn Chips follows a normal distribution with mean ì ounces and standard deviation ó ounces. Worried about customer complaints and potential ...
October 4, 2009

Physics
A particular sprinter reaches a horizontal acceleration of 13.3 m/s2 out of the starting block. The starting block is tilted such that the vertical component of the force which the starting block exerts on the sprinter compensates for the weight of the sprinter, leading to a ...
October 2, 2009

Psychology
Underlying causes of unipolar and bipolar disorders
September 27, 2009

4th grade english
Bid an buy, wonderful prizes from around the world! Time: Saturday, from 9 A.M. to 6 P.M. Which sentence has a punctuation error? Would it be the first sentence? I think you should take the comma out after buy.
September 22, 2009

English
How do the characters, plot, and theme of The Great Gatsby refute the statement that "the Jazz-Age society was a bankrupt world, devoid of morality, and plagued by a crisis of character"? Use specific details and lines from the novel to support your view.
September 18, 2009

Math
a real estate broker earns a salary of & 21,000 plus 2.5% of the value of any real estate sold. Last year the broker earned $ 52,000. What was the total vaule of all real estate sold by the broker.
September 13, 2009

math
can u give me five percentagesx for homework Thanks
September 13, 2009

math
write the word form of the number that is 10,000,000 greater than 6,021,849
September 1, 2009

Psychology
Final Project Analyzing Psychological Disorders
August 31, 2009

geography
climate depends on such factors as an area's
August 27, 2009

Trigonometry
Need help on interval notations, need more of a definition and understanding, please help!
August 20, 2009

English 3
im doing this now. its hard
August 18, 2009

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