Monday
February 27, 2017

Posts by Laura

Total # Posts: 1,234

Chemistry
What is the calculated value of the partial pressure (atm) of O2 in acid mine water of pH 2.500, in which [Fe3+] = [Fe2+]?
April 10, 2010

Chemistry
I asked the professor, he said I didn't need it to solve the problem.
April 7, 2010

Chemistry
A stoppered flask at 25 C contains 250 mL water, 200 mL octanol, and 50 mL of air. An unknown mass of o-xylene is added to the 
flask and allowed to partition among the phases. After equilibrium has been established, 5.0 mg of o-xylene are measured in the water. 
...
April 7, 2010

CHemistry
The half-life of tritium is approximately 12 years. What will be the molar ratio of tritium to helium-3 in a sealed sampel after 25 years?


April 7, 2010

Chemistry
In manufacturing a fruit drink, citric acid is added to water in the amount of 0.1 mol/L. What is the pH of the resulting 
solution?


April 7, 2010

Chemistry
An analytical chemist determines that an estuarine water sample contains 1.5 g/L of sulfate ion. What is the 
concentration in terms of (a) g/L of S (b) molar concentration of sulfate (c) normality (d) parts per million of sulfate


April 7, 2010

Chemistry
a) Photosynthesis is estimated to produce 360.0 g (dry weight) of plant matter per square meter, 50% of which is carbon. Calculate the total number of grams of carbon "fixed" each year by 1000 square meters.
 b) The photosynthetic reaction can be represented ...
April 7, 2010

Chemistry
How much Fe++ could be present in water containing 1 x 1e-02 M HCO3-
(bicarbonate) without causing the precipitation of FeCO3 (Ksp=10**(-10.7))


April 7, 2010

Chemistry
Taking the mass of the atmosphere to be 4.6E15 metric tons, what mass of carbon must 
be burned in order to increase the average carbon dioxide level in the atmosphere
 by 130ppm by volume (in metric tons)?
April 7, 2010

Chemistry
Calculate the concentration of SO2(ppm) that must be reached in polluted air (in ppm) if the dissolved gas is to produce a pH of 3.2 in raindrops without any oxidation of the gas.
April 7, 2010

Economics
Hello, I was considering to drop economics since i find it useless. My friends and my parents say its an easy subject and that if i drop it i will have one less subject which looks bad on my permanent reconrd. i find it very hard to concentrate in economics, i think u have to ...
March 17, 2010

Finance
John wants a $200,000 house. He is 40 and he retires at 65. He believes he earns 9% annually after taxes. How much must John invest at the end of each of the next 25 years to have the cash purchase price of the house when he retires?
March 15, 2010

Precalculus
idk can you show me how please
March 11, 2010

French
Could you check these thanks Directions: Vrai or faux? Part 1 1. Aux Etats-Unis chaque municipalité a son bureau de poste. Answer: Vrai 2. L'employé(e) des postes distribue le courrier et le facteur travaille au bureau de poste. Answer: faux 3. On ne peut pas...
March 5, 2010

help plz
which word is a synonym of verbiage? a}terse b}wordiness c}curt d}concise
March 1, 2010

synonym
1}select the synonym of the word flamboyant. a}ordinary b}plain c}extravagant d}conventional 2}select the definition for the word senile. a}pre-eminent b}priority c}old age d}clear help plz:)
March 1, 2010

Social Studies
Well, I was thinking maybe it can be a representation of the 2. Dorothy could be referring to the fact that when you look at who is really an illegal or legal immigrant, you can make a quick judgment. We assume that since people look a certain way and just because they aren&#...
February 23, 2010

Social Studies
Bernstein writes that today, "debates about immigration often included the claim that 'my relatives came the legal way,' Hom's daughter, Dorothy responded that "'one's status being legal or illegal, it's two seconds apart at any point" ...
February 23, 2010

math
A cereal company finds that the number of people who will buy one of its products in the first month that it is introduced is linearly related to the amount of money it spends on advertising. If it spends $40,000 on advertising then 100,000 boxes of cereal will be sold, and if...
February 18, 2010

english
oh k i thought it meant a rough copy
February 16, 2010

english
what does it mean when ur teacher says include a revised and proofread copy
February 16, 2010

english
what is a god teacher
February 15, 2010

literature
compare and contrast the characters Natty Bumppo in The Prairie and John in Hospital sketches thanks for the help
February 11, 2010

prescriptivists
which statement does NOT describe prescriptivists? A} language should be rocorded, not judged. B} language use should follow strict rules. C} language use should never change. D} language use should be judged and evaluted. .The answer i choose is C.
February 8, 2010

help plz
umm my next answer will be d cause as i read it over it makes more sense am i right now?
February 5, 2010

help plz
ok so say you were what answer will you choose?:)
February 5, 2010

help plz
Which statement is NOT a requirement for an adequate definition? A}A definitinshould not be expressed in the negative B}A definition should be complex. C}A definition should use a noun, a verb to define a verb,etc. D}A definition should not give an opinion or make a statement...
February 5, 2010

Cookery
hi I am having trouble with this question Why is it important to adjust the shelves to the correct position before lighting the oven ?
February 5, 2010

chemistry
When Dr. Farrell was a graduate student, he prepared a buffer of pH = 8.0 from Sodium Acetate. Why would the casual observer to this buffering faux pas think he had the intellectual agility of a small soap dish?
February 4, 2010

INDO european languages
The Indo-european parent language was first spoken by a pre-historic people in: A} Western europe B} Middle east C} Northern india D} Southeastern europe .The answer i choose is C. Am i correct?
February 4, 2010

astronomy
Astronauts on the Moon look back at Earth, a distance of about 400,000 km away. If the cities of Washington, D.C. and New York are separated by 300 km, what will be the angle between them when viewed from the Moon?
February 3, 2010

help plz
yea u r kerry
February 2, 2010

help plz
Which of the following is an acronym? A} MADD B} FCC C} NBA D} EKG .the answer i choose is b. Am i correct?
February 2, 2010

the latin bases
kerry thx for yrsturdays help
February 2, 2010

the latin bases
thank you for your help
February 2, 2010

Physics
What detector is used to pick up the x-rays in hospitals?
January 31, 2010

Help plz
thx
January 30, 2010

Help plz
The first indo-language to arrive on the british isles was: A} Italic B} Balto-Slavic C}Celtic D}Gothic .I choose c.
January 30, 2010

HELP PLZ
thank you ms.sue :}
January 30, 2010

HELP PLZ
ok but is my answer currect?
January 30, 2010

HELP PLZ
The indo-european parent language was first spoken by a pre-historic people in: A}western europe B}Middle east C}Northern india D}Southastern europe .i choose d.
January 30, 2010

help plz
cognate languages are those languages which: A}Derive from a single parent language. B}Borrow words from each other C}Use the same alphabet D}Are spoken in the same country .The answer i choose is B.
January 30, 2010

math
u should of learned that in school ahh
January 30, 2010

math
4 divided by 5.12
January 28, 2010

american literature
what are three features of a lyric poem ? explain how "Song Concerning a Dream of the Thunderbirds uses these features. Imagination, Emotion, and Melody how are they used
January 28, 2010

math
i don't know i need help on the homework can you give me an answer..!
January 26, 2010

math
thank you =)
January 24, 2010

math
how do I solde this equation? pls help.. 1. 3/2x + 2 = 1/2 - 1/2x
January 24, 2010

grade 11 physics
PLEASE HELP - NOBODY ANSWERED MY QUESTION YESTERDAY. sue drives her 1452 kg car along a straight road at a constant velocity of 30 m/s [E]. Ger brakes suddently give out. she puts the car in neutral and lets it coast for 25 seconds. The air drag decelerates the car to a ...
January 24, 2010

grade 11 physics
sue drives her 1452 kg car along a straight road at a constant velocity of 30 m/s [E]. Ger brakes suddently give out. she puts the car in neutral and lets it coast for 25 seconds. The air drag decelerates the car to a velocityof 25 m/s [E]. assume a frictionless surface. PART ...
January 23, 2010

Math
(-11)(-6)/(-3)+15/(-5)-2
January 22, 2010

Middle School Math
How do you solve this problem? 5/6-1/3+7/8 divided by (1/2)^3
January 21, 2010

HSM210
Hi Sue, how can i research each of these question in on the internet, using the most efficent way. I learn diffrently and my deceptive reasoning is weak in this area. if i know the ansswer,i can learn where how it originated, thanks
January 19, 2010

simple machines
A box with a force of 100N is pushed up an inclined plane. It takes a force os 75N to push it to the top. What is the efficiency of the inclined plane?
January 19, 2010

math
Decrease a number by 5, divide the result by 2, then add 17 and multiply by 5. If the final result is 100, with what number did you start?
January 15, 2010

Math
that actually is wrong because i found the answer to that in the back of my book and the answer is 5/12, but i have no idea how to get to that answer
January 5, 2010

AP Statistics
Of all U.S. fourth graders, 71% are assigned mathematics homework three or more times per week. If 5 fouth graders are randomly selected to be checked for this frequency of homework assignment during a randomly chosen week, find the probability that A.) exactly one fourth ...
January 3, 2010

English
Can you please tell me what this means? Thank you. humans come and go in the continuous transformation of the universe. Indeed, entire towns and peoples come and go.
December 13, 2009

10th grade world history
why do religions that have common geographic origins tend to share common code of behavior and views of the nature and reason for existence?
December 6, 2009

physic
please help, i have done the part a and b but i don't know how to do part c. An air-track glider attached to a spring oscillates between the 3.00 cm mark and the 50.0 cm mark on the track. The glider completes 10.0 oscillations in 36.0 s. What is the period of the ...
December 5, 2009

7th grade science
thanks
November 30, 2009

Physics
Not sure
November 24, 2009

math
Multiply or divide to find an equivalent fraction: 11/22
November 19, 2009

math
How to find a number sentence other than 10989 x 9 = 98901 that is the same when you read its digits from either direction
November 18, 2009

college algebra
Solve for x: -(4x+4)/5= (5x-1)/2 - x/3
November 14, 2009

math
Lauren has a normal deck of 52 playing cards. If she draws a random card from the deck, what is the probability that it will be a red Jack, a red Queen, or a red King?
November 13, 2009

personal finance
After a protracted legal case, Joe won a settlement that will pay him $11,000 each year at the end of the year for the next ten years. If the market interest rates are currently 5%, exactly how much should the court invest today, assuming end of year payments, so there will be...
November 10, 2009

Science
Can someone explain 'simply' what Particle theory and Brownian motion are. I'm finding alot of websites hard to understand. Thanks
November 9, 2009

United States government
If the issue is whether a person's civil rights were violated in a court decision,through what levels of courts might that person appeal
November 7, 2009

Trigonometry
prove:(cscx-cotx)^4 x (cscx+cotx)^4 = 1
October 28, 2009

9th grade
I kinda made it sound like she was schizopfrenic LAMB TO SLAUGHTER: MONOLOGUE Mary: Did he just divorce me? Voice: Uh yes obviously he did. Mary: Well from the way I see it he’s just afraid of being a father. Voice: Wow you are so dumb. It’s because there’s ...
October 27, 2009

Math
prove:(cscx-cotx)^4 x (cscx+cotx)^4 = 1
October 26, 2009

Advanced Functions
to solve system of equations you solve for one variable and plug into the next in this case you have an equation for I so plug into the next equation and solve (23/w) + w = 32
October 24, 2009

earth science
time and space grown is also a factor
October 24, 2009

// calculus - trig derivatives
how do i do i do y=cos(radt)+ rad(cost)? ---- f(x) = (3x^2) (csc4x)^4 // f'(x)=? my notes say : f'(x) = (3x^2)5(csc4x)^4(-csc(4x)(tan4x)(4)+(csc4x)^5(6) I redid it and i got : f'(x) = (3x^2)5(csc4x)^4(-csc4x)(cot4x)(4) + (csc4x)^5(6x) which is correct? if its my ...
October 24, 2009

physics
assuming it drops from rest you know: vo=0 t=2.8 a=9.8 (gravity assuming down is +) v=? use the equation v=vot+at^2 then you want to find height. x= vot+.5at^2
October 24, 2009

// calculus - derivatives
y = sec(5x) / x^2 my notes say y' = 5x^2sec5xtan5x-2xsec5x i get y'= sec5x(-2x^-3)+sec5xtan5x(5)(x^-2) when i change it to (sec5x)(x^-2) or by quotient rule [ (x^2)(sec5x)(tan5x)(5)-(sec5x)(2x) ] / (x^4) which is correct?
October 24, 2009

math
chris - do your own homework. at least try it first, show some work or where youre stuck on.
October 24, 2009

calculus
f(x) = (3x^2) (csc4x)^4 // f'(x)=? my notes say : f'(x) = (3x^2)5(csc4x)^4(-csc(4x)(tan4x)(4)+(csc4x)^5(6) I redid it and i got : f'(x) = (3x^2)5(csc4x)^4(-csc4x)(cot4x)(4) + (csc4x)^5(6x) which is correct? if its my notes why?
October 24, 2009

math
perpendicular lines have negative reciprocal slopes such as 3 and -1/3 so put them into y=mx+b form and see.
October 24, 2009

History
In a sentence or two can you please tell me what Marbury vs. Madison was?
October 22, 2009

HRM
how do you write a response recommendation anaylsis for a large and small firm for the demands of growing technology and more, but I am lost how to write it
October 21, 2009

math
How to explain 4/34 (34 divided by 4) to a 4th grader?
October 20, 2009

Decision Making
I can't decide on an event that would have been a rational decision at one time but now is considered to be an irrational decision. I have been looking at the different wars but still don't see it.
October 13, 2009

4th Grade Math
Arrays and an expanded algorithm: 23 x 17
October 12, 2009

com 140
Thank you Ms. Sue. I have found the answer's to this question but I do appreciate how quickly you got back to me
October 4, 2009

com 140
There was a fee tips in there but they are looking for the ones that are not in there. That is what I am having a hard time finding,
October 4, 2009

com 140
Suggest two tips for creating academic documents not mentioned in the resource information.
October 4, 2009

someone answer please
Tracy Migre, a certified public accounting, has completed the following transactions. Ms.Migres assests , liabilites, and owner equity account titles and balances are shown in the table below. use the table on the page to show the effect of each transaction. Transactions: 1)...
September 29, 2009

i need help accounting
Tracy Migre, a certified public accounting, has completed the following transactions. Ms.Migres assests , liabilites, and owner equity account titles and balances are shown in the table below. use the table on the page to show the effect of each transaction. Transactions: 1)...
September 29, 2009

accounting
i mean 1)empty than next box you write your new balance
September 29, 2009

accounting
sorry it didn't post right there is a chart 18 boxes and 6 colums.6cloums are the beginning balanes there on top cash in the bank $5,000, accts rec. $900, equipment $14,000 supplies 1,500 accts payable 3,000 t.migre capital 18,4000 then on the side of the chart it says 1) ...
September 29, 2009

accounting
Tracy Migre, a certified public accounting, has completed the following transactions. Ms.Migres assests , liabilites, and owner equity account titles and balances are shown in the table below. use the table on the page to show the effect of each transaction. Transactions: 1)...
September 29, 2009

please i need help accounting
i have a promblem it gives me the information and form i understand the information but cant fill out the form because i don't know how and its 71 points out of the whole exam. is there anyway u can help me out if i give you the information. its about transactions the ...
September 28, 2009

accounting
what catorgorie does commissions fall in: A)income statement B)statement of changes in owner equity C)balance sheet i think a what catorgorie capital falls in: A)income statement B)statement of changes in owner equity C)balance sheet i think b
September 28, 2009

stoichiometry
if 5.00g magnesium is combined with 10.0 g of chlorine, show by calculation which substance is the limiting reactant and calculate the theoretical yield of magnesium chloride for the reaction. Someone PLEASE HELP ME!!!!
September 11, 2009

physic
Jules Verne in 1865 proposede sending men to the moon by firing a space capsule from a 220-m-long cannon with final velocity of 10.97 km/s. what would have beed the unrealistically large accelerationexperienced travels during launch? compare your answer with the free-fall ...
September 7, 2009

math
an average family of four uses roughly 1200 liters (about 300 gallons) of water per day (1 liter=1ooocm cubed) . how much depth would a lake lose per uear if it uniformly covered an area of 50 square kilometers and supplied a llocal town with a population of 40,000 people...
September 5, 2009

math
thank you
September 5, 2009

math
commutative property?
September 5, 2009

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