Friday
December 19, 2014

Posts by rebekah


Total # Posts: 458

Social Studies
How does the movie The Lion in Winter relate to World History? thanks
December 1, 2009

Science
What chemicals are in curds? thanks
November 30, 2009

Science
ok thanks so much!
November 21, 2009

Science
thanks, What do you put for the hexagon?
November 21, 2009

Science
how do you draw a the amino acid Phenylalanine? thanks:)
November 21, 2009

algebra
3x????
November 16, 2009

Algebra
NeverMind!!
November 16, 2009

Algebra
help please:)!!
November 16, 2009

Algebra
A grocer mixes together some cashews costing 8$ per kilogram with some nuts costing 10$ per kilogram. The grocer sold 12 kg of the mixture for 8.50$ per kilogram. How many kilograms of cashews were in the mixture? I have to find 2 equations then find the answer most likely ...
November 16, 2009

Scoial Studies
What were the effects of The Trojan War in its time and today? Does anyone know any websties with this info? Thanks so much!:)
November 8, 2009

World History
Is the story of how the Trojan war started with Helen, and Paris in the Iliad? Thanks:)
November 7, 2009

Economics
What does a private option in health care mean? thanks
October 31, 2009

English
Thank you :]
October 28, 2009

English
What is the definition of lowing in the context of the book "Animal Farm?" thanks:)
October 28, 2009

English
yah thats how i was confused
October 20, 2009

English
In a free verse poem do you need punctuation?
October 20, 2009

science
Write a systematic method to answer, 'How quickly and how do you produce rocket fuel?' using a boling tube, acid, a balloon, and a measuring cylinder?
October 12, 2009

Science
thanks :]:]:]
September 30, 2009

Science
What is the temperature and moisture of a tropical rainforest? thanks
September 30, 2009

algebra 1
a cars fuel economy E ( miles per gallon) is given by the formula E=m divided by g where m is the number of miles driven and g is the number of gallons of fuel used solve the formula for m
September 29, 2009

Science
What is the temperature and moisture of the tropical rainforest? thanks
September 27, 2009

math
238 x360 ----- use a calculator or write it on paper
September 23, 2009

Math
How would I use Distributive property to rewrite each expression then solve 35 x 21
November 18, 2008

french - reflexive verbs
sentence starter : je me - I tu te -You (singular)
November 2, 2008

physics
how to find total displacement of a cheetah that can run 117km/h for 30.0s
August 24, 2008

10th grade math
Thanks so much.
August 19, 2008

10th grade math
Yah, so would you not even look at the 10 to the 12th part of it?
August 19, 2008

10th grade math
1.548937075 x 10 to the 12th. round the number to 3 significat figures. I thought I would respost this because the other one was getting confusing
August 19, 2008

10th grade math
If you didn't do the power of 10 and just kept the number 1.548937075 wouldn't it be rounded to 1.55 if it was round to 3 significant numbers?
August 19, 2008

10th grade math
sry... 1.548937075 x 10 to the 12th. round the number to 3 significat figures.
August 19, 2008

10th grade math
ok. Like here in this example... 1.548937075 x 10 to the 12th. Would you do the problem 1.548937075 x 10 to the 12th which would be 1,548,937,075,000 first before you rounded. I think in the number that I got (1,548,937,075,000) there are 10 significant numbers??
August 19, 2008

10th grade math
How would you figure out 1.45386759 x 10 to the 12 and round to the significant figure? thanks
August 19, 2008

mathss
Can someone explain how to do this: There are 100 boys , 80 girls, and 20 teachers. Out of these, how many ways can 2 girls, 2 boys and 1 teacher (all together in a group of 5) be chosen?
August 19, 2008

Science
What are some things children must learn but animals don't need to know?
February 5, 2008

poetry
For AP Literature, I have to write a 2 page (double spaced) paper analyzing how the painting Nude Descending a Staircase by Marcel Duchamp and the poem of the same name by X. J. Kennedy have a successful connection. What is a good place to start and what are things to mention ...
January 31, 2008

Chemistry
For a.) NH2OH x^2/.50 = 1.1 x 10^-8 => .50(1.1 x 10^-8) = x^2 5.5 x 10^-9 = x^2 5.5 x 10^-9 square root = 7.416 x 10^-5 = x these are all the steps I have
December 21, 2007

Chemistry
Hello! It's me again. How do I calculate % ionization for a.) .50M HONH2 Kb = 1.1e-8 b.) .10M CH3NH2 kB = 4.38e-4 What is [OH-] and pH of these solutions a.) 0.090M NaOH and 0.090M LiOH b.) 0.050M Ba(OH)2 and 0.050M RbOH
December 21, 2007

Chemistry
By the way, how do you find H+ and OH- concentrations from the pH? I have scoured my text book, but found nothing.
December 21, 2007

Chemistry
I already worked out (c), but the rest is still just mush. I'm sorry for my stupidity, but this just doesn't make sense. I can find [H+] or [OH-] as long as I have the concentration of 1 of them, so, ???
December 21, 2007

Chemistry
At 40 degrees Celsius, the value of Kw is 2.92 X 10^-14 a.) calculate the [H+] and [OH-] in pure water at 40 degrees celsius b.)what is the pH in pure water at 40 degrees celsius c.)if [OH-] is .18M , what is the pH
December 21, 2007

chemistry
the following reaction has a Kp = 109 at 25 degrees C 2NO(g) + Br2(g) reversible 2NOBr(g) If the equilibrium partial pressure of Br2 is 0.0159 atm and equil pressure of NOBr is 0.0768 atm, calculate the partial pressure of NO at equlibrium. What are the steps to follow for ...
December 3, 2007

chemistry
Is there a good website that has good examples for ap chemistry ranging from easy to difficult?
November 29, 2007

chemistry
where does the temperature factor in? I raised it to 1/2 and got 1.75, but that was not the right answer. (I forgot to mention this, but the first reaction is the original one) Could you put a example up? I am very much a visual learner and need to see it before I can do it.
November 29, 2007

chemistry
all reversible reactions Kp= 3.5 X 10^4 temp: 1495K N2(g)+3H2(g) reversible 2NH3(g) 1/2N2(g) + 3/2H2(g) reversible NH3(g) what is the value of K at the temp. what is the process for this? please be detailed.
November 29, 2007

college essay
How long should an application essay be? (max and min)
November 25, 2007

Chemistry
this is all fine and good, but it doesn't give me what I need to find specific heat. If it helps, I meant heat of formation (delta H f).
November 25, 2007

Chemistry
what is the specific heat for Al2O3 as a solid?
November 25, 2007

chemistry
how do you convert joules to kilojoules? example: 2240.48 joules 3887.4 joules 13.85 joules
November 15, 2007

chemistry
a 5.00g sample of Al pellets (specific heat=0.89J/oC*g) and a 10.00g sample of Fe pellets (specific heat=0.45J/oC*g) are heated to 100.0oC. The mixture of hot iron Al is then dropped into 92.1g of water at 21.8oC. Calculate final temp of metal and water mixture, assuming no ...
November 6, 2007

chemistry
what are the van der waals coefficients (a and b) for nitrogen?
November 1, 2007

grammar
underline a book name and put a poems name in quotes
November 1, 2007

chemistry
I need to calculate the pressure exerted by the hydrogen in an eudiometer for a weighing by redox lab. mass of Mg: .021 g temp: 295K barometric pressure: 29.87 inches Hg volume of H2 gas: the difference between tiop water level in eudiometer = 322 mm the difference in the top ...
October 25, 2007

chemistry
I need to calculate the pressure exerted by the hydrogen in an eudiometer for a weighing by redox lab. mass of Mg: .021 g temp: 295K barometric pressure: 29.87 inches Hg volume of H2 gas: the difference between tiop water level in eudiometer = 322 mm the difference in the top ...
October 25, 2007

science
So just take 5 mols of water and convert to molecules?
September 30, 2007

science
Another question. How do I find out how many molecules of water of hydration are in each formula unit of a compound? I want to solve the actual problem myself, but would like some headway.
September 30, 2007

AP Chemistry
I have almost the same question as Josh from August 23rd. If you use 10.0 g of CuSO4 and excess NH3, what is the theoretical yield of Cu(NH3)4SO4? I can handle the theoretical yield, but how do I find the mass of NH3 so I can find the thoretical yield?
September 30, 2007

Psychology
Glutamate is another neurotransmitter associated with memory.
September 30, 2007

the bible
which part of the bible has most pages the old or the new testtament The number of pages will vary depending on the publication. But I believe the Old Testament has more books in it than the New Testament does, if that makes any difference. The best you can do, I think, is to ...
January 8, 2007

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