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March 27, 2017

# Posts by leila

Total # Posts: 147

The values above are in the units of kJ/mol
March 17, 2012

************The values I used C(graphite): change in delta Hf=0 change in delta G= 0 change in delta S= 5.7 Cl2 change in delta Hf=0 change in delta G= 0 change in delta S= 223.1 CCl4 change in delta Hf=-139 change in delta G= -68.6 change in delta S= 214.4
March 17, 2012

I posted this question already but you never replied back :( Consider the following reaction at 298 K: C(graphite) +2Cl2 (g) -----> CCl4(l) Calculate the following quantities. Delta H: -139 kJ/mol deltaS(sys)=? J/mol*K deltaS(surr)=? J/mol*K deltaS(univ)=? J/mol*K My answer...
March 17, 2012

chemistry
Change in Hf(kJ/mol) Change in G Change in S C(graphite) 0 0 5.7 Cl2 0 0 223.1 CCl4 -139 -68.6 214.4
March 16, 2012

chemistry
Consider the following reaction at 298 K: C(graphite) +2Cl2 (g) -----> CCl4(l) Calculate the following quantities. Delta H: -139 kJ/mol deltaS(sys)=? J/mol*K deltaS(surr)=? J/mol*K deltaS(univ)=? J/mol*K My answer is: deltaS(sys)=-253.3J/mol*K deltaS(surr)=466.4 J/mol*K ...
March 16, 2012

physics
(largest) R_outer: .6m R_inner: .5m R_outer: .4m R_inner: .3m R_outer: .4m, R_outer: .2m R_inner: .2m , R_inner: .1m R_outer: .6m R_inner: .2m (smallest)
August 8, 2011

Math
You are ﬁ ve feet tall and cast a seven-foot eight-inch shadow. At the same time, a basketball hoop casts a 19-foot shadow. How tall is the basketball hoop? Assume the triangles are similar.
April 6, 2011

social studies
who was the self made millionare from florida who started the door-to-door sale after the civil war???????? I NEED HELP!
March 14, 2011

math
The gas tank in Micheal's car can hold 18.0 gallons. If the tank currently contains 5.5 gallons, what fraction of the tank is full?
February 16, 2011

projectile motion
You have a boat with a motor that propels it at vboat = 4.5 m/s relative to the water. You point it directly across the river and find that when you reach the other side, you have traveled a total distance of 27 m (indicated by the dotted line in the diagram) and wound up 14 m...
November 14, 2010

projectile motion
A home run just clears a fence 105 m from home plate. The fence is 4.00 m higher than the height at which the batter struck the ball, and the ball left the bat at a 31.0° angle above the horizontal. At what speed did the ball leave the bat
November 14, 2010

projectile motion
You fire a squirt gun horizontally from an open window in a multistory building and make note of where the spray hits the ground. Then you walk up to a window 5.0 m higher and fire the squirt gun again, discovering that the water goes 1.5 times as far. Ignore air resistance. ...
November 14, 2010

physics
A juggler throws a ball from height of 0.950 m with a vertical velocity of +5.50 m/s and misses it on the way down. What is its velocity when it hits the ground?
November 14, 2010

it is present
November 14, 2010

He drove past the dog
November 8, 2010

PHYSICS ---HELP!
how would I show that in m/s?
October 6, 2010

PHYSICS ---HELP!
A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate?
October 6, 2010

PHYSICS ---HELP!
Water flows approx. 0 over a dam at the rate of 660 kg/s and falls vertically 86 m before striking the turbine blades. Calculate the rate at which mechanical energy is transferred to the turbine blades, assuming 53% efficiency.
October 6, 2010

SETS AND COUNTING
In a survey of 289 college students, it is found that 65 like Brussels sprouts, 93 like broccoli, 55 like cauliflower, 28 like both Brussels sprouts and broccoli, 24 like both Brussels sprouts and cauliflower, 20 like both broccoli and cauliflower, and 13 of the students like...
October 4, 2010

MATH SETS AND COUNTING
There are a total of 103 foreign language students in a high school where they offer only Spanish, French, and German. You are given the following details for this semester: 44 take Spanish. 44 take French. 42 take German. 7 take Spanish and French but not German. 5 take ...
October 4, 2010

MATH
Find the monthly payments for an ordinary annuity that will yield a future value of \$122000 at % interest for 22 years. payment
September 22, 2010

chemistry
[Cu(NH3)4]2+ + SO4(aq)2 + H2O [Cu(NH3)4]SO4•1H2O What is the theoretical yield of the products?
September 14, 2010

alg. II
Graph and state domain and range: f(x)=[x] (greatest integer function)
July 5, 2010

Math
katie is going to adopt kittens from a litter of 11. how many ways can she choose a group of 3 kittens?
May 5, 2010

English
It's an indefinite prounoun
April 5, 2010

English Lit
Thank you!!!
April 2, 2010

English Lit
I need help on proof reading this story. Christmas should be a time of celebrating the birth of Christ, but it seems like people make it more about themselves and what should they get for each other and who’s gift is more expensive or how we can compete when it comes to ...
April 2, 2010

Algebra
trains a and b are traveling in the same direction on parallel tracks. train a is traveling at 60 miles per hour and train b is traveling at 64 miles per hour. train a passes a station at 1:25 pm. if train b passes the same station at 1:55 pm, at what time will train b catch ...
March 1, 2010

Find each product. 1) 2t(t + 2) 2) (2n +1) * (n - 4)
April 30, 2009

According to the 1990 Census, the population of the United States was 2.49 x 10^8. The cost of taking the census in 1990 was 2.6 x 10^9 dollars. How much did the census cost per person in the United States?
April 29, 2009

Physics
January 14, 2009

math
i do not know
October 16, 2008

Biology
Describe two scientific theory (atomic,kinetic,cell theory) and non scientic (moral, ethical, religious theories ).Differentiate between the scientific and non scientific theories explaining why there are some questions that science cnnot answer.
October 1, 2008

history
thank-you! i thought i posted the article but it looks like i didnt...
September 17, 2008

history
can someone tell me what this article is about? just type it in google- I don't really understand it. What I got from it is that Mcain is sort of going back on what he said years ago but i don't really get it. McCain Embraces Regulation After Many Years of Opposition
September 17, 2008

history
can someone help me write a thesis statement about susan B. Anthony and her role for helping women. It needs to be something along the lines of: Without Anthon'y creation of..........would not have been possible or Susan Anthony made the greatest contribution to women'...
September 4, 2008

math
A motorboat can maintain a constant speed of 16 miles per hour relative to the water. The boat makes a trip upstream to a certain point in 20 minutes and the return trip takes 15 minutes. What is the speed of the current?
September 3, 2008

math
A motorboat can maintain a constant speed of 16 miles per hour relative to the water. The boat makes a trip upstream to a certain point in 20 minutes and the return trip takes 15 minutes. What is the speed of the current?
September 3, 2008

math
I DON'T UNDERSTAND WHAT THE ANSWER WOULD BE....
September 2, 2008

math
Wendy is a loan officer and has 1,000,000 to lend and is required to get an average return of 18% per year. If she can lend at the rate of 19% or at the rate of 16%, how much can she lend at 16% rate and still meet the requirement?
September 2, 2008

Economics
Demand function for Zatab: Qd = 15.0 - 0.2P Production cost per unit: \$5 Mirk Labs incurred a \$60 million R&D cost 1) What wholesale price will Mirk Labs set? 2) How much Zatab will it produce and sell annually? 3) How much annual profit does the firm make on Zatab?
March 10, 2008

Economics
Demand function for Zatab: Qd = 15.0 - 0.2P Q = annual quantity demanded P = wholesale price of one Zatab unit Production cost per unit: \$5 Mirk Lab incurred a \$60 million R&D cost a decade ago 1: What wholesale price will Mirk Labs set? 2: How much Zatab will it produce and ...
March 10, 2008

Economics
Hello, I'm kind of struggling with this question. Can someone please help clarify this question. Since stock price beta tend to vary depending on the time frame analyzed, daily, weekly, and monthly. How do these factors influence or undermine the usefulness of beta as a ...
March 9, 2008

physics
A positive and a negative charge, each of magnitude 1.7 10-5 C, are separated by a distance of 11 cm. Find the force on each of the particles. what formula do i use?
January 12, 2008

Math
as in 5x5
September 30, 2007

Math
wat is 5 times 5?
September 30, 2007

ETH125
I'm having a hard time understanding the Checkpoint assignment on Legislation Legacy...Can anyone help me? Here is the question: Post a summar of a current issue between Native Americans and the federal government. Identify the legislation that you think is linked to the ...
June 23, 2007

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