Saturday
October 25, 2014

Posts by andrew


Total # Posts: 978

Biochemistry
What is the pH of the solution that results from mixing 5 ml of 0.2 M NaOH and 100 mL of 0.05 M lactic acid? (Pka of lactic acid= 3.86)
January 11, 2009

math
oh i see thank you
January 6, 2009

math
you and a friend are collecting leaves.In your collection of 45 leaves, 4 are oak leaves. In your friend's collection of 36 leaves, 3 are oak leaves. Whose collection has a greater fraction of oak leaves? how do i convert it into a fraction?
January 6, 2009

Chemistry
BrO3- + 5Br- + 6H+ <--> 3Br2 + 3H2O If 25.0 ml of 0.200-molar BrO3- is mixed with 30.0 ml of 0.45-molar Br- solution that contains a large excess of H+, what is the amount of Br2 formed, according to the above equation? The answer is 0.00810 moles but I don't know ...
December 16, 2008

Calculus
i think u forgot to add the 2x^3 to the antiderivitive for the fundamental theorm step
December 16, 2008

Calculus
your right im sorry, i was thinking we were rotating around x=3 lol but will you do it so i can check my answer?
December 16, 2008

Calculus
No it wouldnt be the same because one is a disk rule one is a washer rule
December 16, 2008

Calculus
washer method!? Find the volume of y=x^2+3, y=3, between [0,2] around y=3
December 16, 2008

Calculus
Using the Disk Method or washer method (im not sure which one) Find The volume of y=x^3 , y=1 , x = 2 revolving around the X axis
December 16, 2008

math
Rearrange and simplify for x when y= mx+b
December 10, 2008

math
thanks mark
December 10, 2008

math
Rearrange and simplify for b when A= 1/2 bxh
December 10, 2008

Biology
I just need somebody to explain in plain english what "Immune Modulation" is. Google doesn't help at all, it just directs me to bunch of science research papers!
December 9, 2008

Biology
What is the difference between type I and type II immune response?
December 8, 2008

History- WWI
Does anyone know about the Canadian Stormtroopers?? I heard during world war 1 Germans named the Canadians "Stormtroopers"- Who were they? Some links would be helpful! Thanks
December 8, 2008

english
thanks for the help (haha dad i was right!)
December 6, 2008

english
is superiority an emotion? - The feeling of superiority
December 6, 2008

bio
the nucleolus would be the head office or something that controls the whole thing
December 4, 2008

Chemistry
you increase the atomic number but i don't know why I think because the atoms gain more electrons the higher they go on the periodic table
December 4, 2008

science
the spraying of pesticides may kill the mosquitoes but the remaining mosquito that survive the chemical grow an immunity to the pesticide causing them to grow a gene that prevents the insect to die to the pesticides Also when the pesticides reproduce they create new mosquitoes...
December 4, 2008

9th grade chemistry
the 2 in the chemical equation means that the element contains more than 1 Hydrogen atom Example H20 = Water 2 hydrogen and 1 oxygen molecule
December 4, 2008

English
okay thanks I was really stuck with that one XD
December 4, 2008

English
okay but what i'd like to know is why is it important for someone to be able to interact in society, don't they think that they feel happy enough???
December 4, 2008

English
Question : Matthew Antony, Grant’s former teacher tells him, “What do you know about life?” He tells him, “ You have to go away to know life.” – What does this mean to you? I need some pointers to help me answer my question... (like extra ideas)
December 4, 2008

Biology
the nucleus would be like the head office (or something that controls the whole thing)
December 4, 2008

Chemistry
what are the order intermolecular forces according to strength??
December 2, 2008

social studies
Can anyone answer any of these questions....? I'm not very associated with the Chicago area.. - What site is near or at the Chicago River today? - How is the area from Lake Michigan to the Chicago River important today? What was the problem with the area in the 1830s and ...
November 18, 2008

Chemistry
Why does the reaction of 2-bromo-2-methylbutane and ethanolic solution of silver nitrate interfered by the presence of water in the sodium iodide in acetone reagent? (Substitution chemistry) Thanks for any help!!
November 16, 2008

english
In grade 11 and trying to understand this poem which the teacher gave very little explanation for, telling to "interpret the poem for yourself" The poem is called Bushed and is written by Earl Birney. He invented a rainbow but lightning struck it down shattered it ...
November 11, 2008

math
How to convert -1.7 into fraction thanks
November 11, 2008

math 8th grade
negative one and two tenths minus 5 tenths
November 11, 2008

the subject is science
thanks
November 11, 2008

8th grade
Can we obtain water from milk, vinegar & ink. What are the steps how to do it Thanks
November 11, 2008

Math
The per capita public debt (in thousands of dollars) of the United States for the years 1940 to 1990 appears below. Create a scatterplot and determine a trend line. Based on your scatterplot, what do you expect the per capita public debt to be in 2020? Year-1940 1950 1960 1970...
November 10, 2008

7th grade
There isnt one
November 9, 2008

Chemistry
What is the balanced equation for the preparation of cis-1,2-cyclohexanediol???
November 5, 2008

Chemistry
Please help!! It's due tomorrow morning!!!!! --Why is it necessary to use a mixed aqueous-organic solvent system for the oxidation of cyclohexENE?
November 4, 2008

Calculus
If the tolerance on the volume of a cube is a 2% error then what should the tolerance be fore each side? So what i did was V=x^3 dV = 3x^2 dx dV/V = 2% What should I do next? the answer is 2/3% but I don't know how it works. Thanks.
November 3, 2008

ap biology
what is difference between blending patterns of inheritance and particulate patterns of inheritance?
November 2, 2008

11th grade
what is difference between blending patterns of inheritance and particulate patterns of inheritance?
November 2, 2008

Math riddle PIZZAZZ Worksheet
he was jumping for joy
October 30, 2008

Chemistry
I'm so confused!!!!!!!!!! I need to write out the equation for the reaction between (+)-tartaric acid and (+_)-1-phenylethylamine. I know tartaric acid is C4H6O6 and 1-phenylethylamie is C8H11N. Where do I go from here?
October 27, 2008

Spelling
Sorry, another quick question... u is a vowel, so shouldn't there be a "an" before it?/ For example: "Distress is not an universal association..." However, microsoft word keeps correcting me to say "a" instead.
October 26, 2008

Grammar
thank you!!
October 26, 2008

Grammar
Which one is correct? "There are studies and research that supports categorizing obesity as a mental disorder..." or "There are studies and research that support categorizing..."
October 26, 2008

CHEM
1.46,1.98
October 24, 2008

Phyics
A rubber ball with a radius of 4.8 cm rolls along the horizontal surface of a table with a constant linear speed v. When the ball rolls off the edge of the table, it falls 0.83 m to the floor below. If the ball completes 0.68 revolutions during its fall, what was its linear ...
October 19, 2008

chemistry
it means that salt is made up of different stuff then the things that you use to make it.
October 13, 2008

English
A question on "The Lottery" by Shirley Jackson ? I am writing an essay explaining how the use of literary devices creates a sense of horror. I wrote down things like "withheld knowledge" (that the author not telling readers the "prize" of the ...
October 12, 2008

science
this is the blank word
October 7, 2008

science
This is because the energy from the sun is __________ the water up. Is this heating?
October 7, 2008

Calculus
how do i find dy/dx of y = (x^3-1)/cos(x) do I start with (x^3-1)*cos(x)^-1 ? Thanks!
October 4, 2008

social
in the pacific northwest
October 3, 2008

social
i mean chinook salmon
October 3, 2008

social
what is the season that salmon return?
October 3, 2008

science
search mold in wikipedia
October 3, 2008

Spelling
hmm... e i guess
October 2, 2008

social
oh they were made of sinew?
October 2, 2008

social
um i need info on native american fishing nets
October 2, 2008

AP Chemistry
Thanks!!
October 2, 2008

AP Chemistry
2K (s) + 2H2O (l) --> 2KOH (aq) + H2 (g) When 0.400 mole of potassium reacts with excess water at STP, what is the volume of hydrogen gas produced? the answer is 4.48 liters but I keep getting wrong numbers! please help! Thanks!
October 2, 2008

AP Chemistry
since PV=nRT PV/nRT = 1 or did you mean PV=nRT? P is pressure in atm and V is volume in liter and n is # of moles and R is 0.08206 and T is tempurature in Kelvin.
October 2, 2008

5th grade math
i still dont get bob help!!!!!!!!!!
September 30, 2008

5th grade math
the sum of two numbers is 34. their difference is 18. what are the two numbers?
September 30, 2008

chemistry
Assume that the entire mass of an atom is concentrated in its nucleus, a sphere of a radius 1.5 x 10 to the -5 pm. If the mass of the atom is 2.39 x 10 to the -22 g, what is the density?
September 29, 2008

math
i think you divide 500 by 6
September 29, 2008

5th grade
thanks
September 29, 2008

5th grade
if a letter has a line on it does it mean its a long or short
September 29, 2008

chemistry
what is the total pressure of a gas mixture that contains hydrogen at 0.45atm nitrogen at 0.25 atm and argon at 0.60 atm
September 29, 2008

5th grade math urgent
Okay look: 00-01-$7586 01-02-$8022 02-03-$8502 03-04-$9249 04-05-$9877 Jason started college during the 2001-2002 year and graduated during the 04-05 year. How much did Jason's education cost? How do you do it????
September 26, 2008

social studies
thank you just wat i needed
September 25, 2008

social studies
i mean, i wanted a picture of the net
September 25, 2008

social studies
Can you find some links to a site that has a picture of a northwest indian fishing
September 25, 2008

Psychology
I have a pretty specific question... I'm wondering if the "Binge-Eating Disorder" is actually included in the DSM 4 as one of the disorders, or if it's just in there for one of future considerations.
September 25, 2008

artist
its just like a hobby. Some people like it some don't.
September 23, 2008

math
one difference between identity,zero, commutatiive and associative property
September 22, 2008

5th grade math
625 thousands
September 22, 2008

Chemistry
What volume of 3.0M Na2SO4 must be added to 25ml of 1.0M BaCl2 to produce 5.0g of BaSO4? The answer is 7.1ml but I don't get it very well. I thought I could use mole ratio of the balanced equation, but it did not work. Thanks a lot!
September 19, 2008

writing
I have to write a narrative essay about a time when i had to do something that went against my beliefs or convictions. I thought about it for like an hour, but I can't figure out a decent example. Can anyone tell me an example so I can understant what kind of topic would ...
September 17, 2008

5th grade
your question isn't clear
September 11, 2008

math
simplify and evaluate where g=3 (2g-1)^2-2g+g^2
September 10, 2008

5th grade math
25 25 out of 5 is 5 because 25divided by 5 is 6. 5x5 is 25.
September 9, 2008

math 2nd grade
58
September 9, 2008

English
I have a problem with 'diction' I kind of 'feel' the sentence, but I don't know what to write. Thanks a lot!! "Art is the antidote that can call us back from the edge of numbness, restoring the ability to feel for another." By using the word "...
September 9, 2008

science
Answer
September 8, 2008

English
I'm learing about connotations of words. Although many words have connotations that most of us agree to because they are culturally shared, some worlds cna be given a different connotation in some contexts. However, since I am a ballingual student, I'm having a hard ...
September 7, 2008

Social Studies
Is there another famous person named John Deere. I can only find the John Deere that invented tractors.
June 17, 2008

social studies for the 3rd time
thANK YOU :)
June 11, 2008

social studies for the 3rd time
I need something that s related to California that starts with a Q
June 11, 2008

social studies(again)
i need a word about california that starts with a P
June 11, 2008

social studies ABC california book
oil
June 11, 2008

social studies ABC california book
thanks a lot:)
June 11, 2008

social studies ABC california book
and try not to do counties,I already did too many of them
June 11, 2008

social studies ABC california book
I cant find a thing that has to do with California that starts with a O (the letter) please help thank you
June 11, 2008

social studies
thank you
June 10, 2008

social studies
California
June 10, 2008

social studies
also M
June 10, 2008

social studies
im working on a social studies weird ABC thing, but I can't find anything for U. please help
June 10, 2008

social studies
thanks a lot, but tht guy didn't found the McD food chain. he just made it more popular.
June 9, 2008

social studies
what has to do with Califoria that starts with a k
June 9, 2008

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