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September 21, 2014

Posts by katie


Total # Posts: 1,667

chemistry
oh..i didn't convert 9.35 into anything though..cause thats the number they gave me
May 7, 2008

chemistry
this is a hard one for me...what do i do with 4.65
May 7, 2008

chemistry
i don't get the OH^-
May 7, 2008

chemistry
ok since 14-9.35=4.65 what do i do after this...
May 7, 2008

chemistry
a pH meter gives a readout of 9.35 when the probe is dipped into an aqueous solution containing the strong base NaOH. What is the molarity of this solution with the respect to sodium hydroxide?
May 7, 2008

chemistry
perfect! 4.79
May 7, 2008

chemistry
hmm i know its 5 something
May 7, 2008

chemistry
so is this what it should look like pOH=-log(7.5x10-10)=9.124
May 7, 2008

chemistry
i understand your trying to help me..but i don't understanf anything that you have helped me.im a step by step person. thats why i thought this would work
May 7, 2008

chemistry
im struggling in this class, and i need as much help as possible.
May 7, 2008

chemistry
you have to explain these better, i dont even understand them
May 7, 2008

chemistry
what is the pH of an aqeuous solution with s hydroxide ion[OH-] concentration of 7.5x10-10 M?
May 7, 2008

chemistry
so am i just going like this?...... -log(0.00378)=2.422??
May 7, 2008

chemistry
can we go over this one?
May 7, 2008

chemistry
how do i do this one
May 7, 2008

chemistry
predict the pH of an aqueous solution that is 0.00378 molar in HBr
May 7, 2008

chemistry
ok so to find it...do i subtract them..or divide?
May 7, 2008

chemistry
9.00x?mL=810 how do i find the missing number
May 7, 2008

chemistry
9.00 x 450x 1.80?
May 7, 2008

chemistry
so is just 9.00x 450x1.80??
May 7, 2008

chemistry
so which ones do i times together?
May 7, 2008

chemistry
Calculate the volume of a 9.00 M HNO3 stock solution that must be used to prepare 450 mL 0f a 1.80 M HNO3 solution.
May 7, 2008

chemistry
Calculate the molarity of a solution that is prepared by dissolving 23.35g of CaCl2 in a sufficient amount of water to make a 600 mL solution
May 7, 2008

chemistry
which is 208.8
May 7, 2008

chemistry
well if you times them its 500000..
May 7, 2008

chemistry
so i times them??
May 7, 2008

chemistry
so how do you do this one..i get it a little bit
May 7, 2008

chemistry
a 36.o% Aqueous solution of sucrose has a density of 1.16g/mL.What mass of sucrose is in 500mL of this solution?
May 7, 2008

chemistry
ok so 170/298=P2/333 which is .570...how do i find P2
May 7, 2008

chemistry
ok so 170/298=P2/333 which is .570...how do i find P2
May 7, 2008

chemistry
okay so does it kinda look like this (170)/298/333...i kinda understand not really
May 7, 2008

chemistry
i dont understand this at alll
May 7, 2008

chemistry
A scuba tank is filled to 2500 psi(170 atm) in a dive shop at room temp/(25 degrees C) then stored in the trunk of a car on a hot day. What will be the new pressure in the tank if the temp. in the trunk reaches 60 degrees C? Express that pressure in atmospheres, not psi.
May 7, 2008

Physics
For incomplete cancellation to occur, opposite pulses must have equal amplitudes different energies equal pulses equal displacements it seems like none of these are quite right but would different energies be the closest.
May 7, 2008

English
thank you
April 28, 2008

English
1a. Did you know a famous animal-rights activist has criticized horseracing because of the dangers involved? 1b. Did you know a famous animal-rights activist have criticized horseracing because of the dangers involved? my answer is A. could you please explain it to me?
April 28, 2008

Advanced Chem
Thank you!!! Yes, it's quite an odd problem. My teacher was attempting to show us something to do with polyprotic acids, but he also neglected to tell us that solving for y was a waste of time because its negligible. I was just confused because there's no conjugate ...
April 22, 2008

ALGEBRA
NEVERMIND, I used common sense
April 17, 2008

ALGEBRA
Beginning in 1995, three digit area codes could begin with any number except 0 or 1. The middle and last number were not limited. How many area codes became available. I know the answer is 640 but I don't know how to explain that answer.
April 17, 2008

ALGEBRA
A new photocopier can make 72 copies in 2 min. When an older photocopier is working, the two photocopiers can make 72 copies in 1.5 min. How long will it take the older photocopier working alone to make 70 copies?
April 17, 2008

Algebra
How would you set it up? Would it be (72/2) + (72/1.5)= (70/x)? we didn't do examples in class
April 17, 2008

Algebra
A new photocopier can make 72 copies in 2 min. When an older photocopier is working, the two photocopiers can make 72 copies in 1.5 min. How long will it take the older photocopier working alone to make 70 copies?
April 17, 2008

ALGEBRA EXTREMELY NEED HELP
NEVERMIND your somewhat right,yet wrong answer helped me and I got the right answer.
April 17, 2008

ALGEBRA EXTREMELY NEED HELP
I don't think that is the correct answer, according to my book it says the answer is -14. I got the same LCD you did
April 17, 2008

ALGEBRA EXTREMELY NEED HELP
It is and believe it or not I am crying because I have a test tomorrow
April 17, 2008

ALGEBRA EXTREMELY NEED HELP
HOW DO YOU SOLVE (2c/c-4)-2=(4/c+5). WHAT IS THE LCD. HOW DO YOU FIND IT BECAUSE I NEED TO KNOW
April 17, 2008

Math
just curious, but would mole be right
April 15, 2008

Math
What do you get when you cross a porcupine with a gopher?
April 15, 2008

ALGEBRA
I my gosh. I knew how to do that it was just that I was thinking too much into the problem. Thanks a bunch.
April 15, 2008

ALGEBRA
How do you solve 2r^2+2r=0
April 15, 2008

ALGEBRA
That's just it. I don't know how to factor it out because i keep getting 2n^2-n=0
April 15, 2008

ALGEBRA
How do you solve the rational equation: (n/n-2)+(n/n+2)=(n/n^2-4) I know that the LCD of the equation is (n+2)(n-2) because that is what you get when you factor out the n^2-4 in the last part of the question. I thought I did it right until I reached the end where I don't ...
April 15, 2008

Algebra 1
First you need to multiply the first and last digits in the equation (2 and 45). Now you find factors of 90 that will equal 13 when added. Both 18 and 5 go into 90 and when used appropriately, they add to -13. So to write it in its new form it would look like 2x^2-18x+5x-45. ...
April 15, 2008

ALGEBRA
How do you solve the problem: (3/s-1)+1=(12/s^2-1)
April 15, 2008

chemistry
use and activity series to Identify two metals that will not generate hydrogen gas when treated with and acid write balanced molecular equations: aluminum metal with dilute nitric acid Write balanced molecular equations:Calcium hydroxide solution with acetic acid How many ...
April 14, 2008

chemistry
use and activity series to Identify two metals that will not generate hydrogen gas when treated with and acid write balanced molecular equations: aluminum metal with dilute nitric acid Write balanced molecular equations:Calcium hydroxide solution with acetic acid How many ...
April 14, 2008

math riddle ALGEBRA WITH PIZZAZZ
what do you call it when somebody spends 20 years in the 24th row of a theatre ?
April 6, 2008

Physics
A ruler is accurate when the temperature is 25°C. When the temperature drops to -16°C, the ruler shrinks and no longer measures distances accurately. However, the ruler can be made to read correctly if a force of magnitude 1.2 103 N is applied to each end so as to ...
April 5, 2008

Physics
Find the length of a bridge if it is known that the steel in the roadbed expands by 0.52 m when the temperature changes from +2 to +30°C.
April 5, 2008

Algebra
write in form y=a(x-h)^2+k y=x^2-x-9 (x^2-2x)-9 complete the square (x^2+2x+1-1)-9 (x^2+2x+1)-1-9 (x+1)^2-9
April 3, 2008

Spanish 3
Thanks, that is very helpful. In the second sentence I was trying to say to stop being; is that incorrect?
April 2, 2008

Spanish 3
Would someone be willing to edit this paragraph? It's part of a three page paper that is supposed to be a new chapter in Don Quixote. I don't really know when to use imperfect and when to use the preterite, or how to phrase things in Spanish. Después de Don ...
April 2, 2008

Science
When did our Earth form to a planet? =]
March 20, 2008

Social Studies
Where did Chinese people get their writing from?
March 20, 2008

geometry
the lenght of pq radius is 2 and the angle measure is 72
March 12, 2008

word unscramble in french
can somebody unscramble the words rinétede? or ropterég? or miénocoser? i really need to know!! and ASAP
March 11, 2008

geometry
A parallelogram has the area of a 507 square centimeters, and its height is 3 times its base. What are the base and height?
March 6, 2008

english (books)
need to know where to find the book the wreck of the zanzibar by micheal morpurgo
March 2, 2008

Math
I have no idea how you would do this problem: Express this expression as a rational number in lowest terms. (1000!-999!-998!)/(1000!+999!+998!)
March 1, 2008

Chemistry
Use the equation below to answer the following questions. Al + H2SO4 ==> Al2(SO4)3 + H2 A. If 8.15 moles of aluminum are reacted, how many moles of hydrogen will be produced? B. If 44.7 g of hydrogen sulfate is reacted, what mass of aluminum sulfate is produced? C. If 34.6 ...
February 29, 2008

trigonometry
Hello! I was wondering if someone could check my answer and tell me if I'm on the right track: "Find a model for simple harmonic motion satisfying the specified conditions" Displacement(t=0), 2ft Amplitude, 2ft Period, 10 sec This is what I got: y=2cos pi/5 t I ...
February 27, 2008

algebra
what were the headlines after a mad scientist trained two eggs to attack a candy store with sharp sticks?
February 26, 2008

Science
How do speakers work I am in 8th grade and have to write a 5 pargaph essay
February 25, 2008

Science
Please give me general information(such as their uses,etc) on 1.Flowers 2.Photosynthesis 3.Food chain 4.Animals 5.Leaves
February 23, 2008

Science
Please give me general information(such as their uses,etc) on 1.Flowers 2.Photosynthesis 3.Food chain 4.Animals 5.Leaves
February 23, 2008

algebraic reasoning
Josephine likes to go hang gliding. she took off from a hillside at an elevation of 700 feet. during the first 5 minutes, she went down to 500 feet. then she rode for another 5 mintues up to a height of 600 feet. she then descended at a rate of 200 feet every 15 minutes until ...
February 22, 2008

physics
Find the speed at which Superman (mass=89.0 kg) must fly into a train (mass = 19564 kg) traveling at 65.0 km/hr to stop it. The system (train + Superman) must end up with zero momentum. With no external forces, Superman's initial momentum must be equal and oppositely ...
February 20, 2008

Chemistry
The theoritical yeild of a reaction that gives off nitrogen trifluoride gas is 844 mL at STP. What total volume of NF3 plus water vapor will be collected over water at 25° C and a total pressure of 1.017 atm?
February 14, 2008

Chemistry
An air thermometer can be constructed by using a glass bubble attached to a piece of small-diamter glass tubing. The tubing contains a small amount of colored water that rises when the temperature increases and the trapped air expands. You want a 0.20 cm3 change in volume to ...
February 14, 2008

biochemistry with more info that was needed
I have the same lab. It says to use pH's of 4, 7, and 10 in the materials.
January 27, 2008

are you POSITIVE?
you could try to look on dictionary website if you dont believe me
January 16, 2008

pronunciation help please
Coh vay
January 16, 2008

Geometry
i guess
January 16, 2008

Geometry
how do you find the slope when given an equation ?
January 16, 2008

Science
so we can find them eassier..dont you think it would be kinda hard if sombody asked you to find the one lake in Africa or something?just think about.
January 16, 2008

Science
samme reason
January 16, 2008

Science
umm so we can find them easier
January 16, 2008

science
is bigger always more
January 16, 2008

PLEASE HELP ASAP..thanks..BIOLOGY
Where in the cell does DNA become RNA? Which larger a chromosome or a nucleotide. Which is larger, a chromosome or a nucleus?
January 15, 2008

science
that doesnt awnser the question at all
January 15, 2008

science
that doesnt awnser the questiona t all
January 15, 2008

Biology
thank you!
January 15, 2008

English-citing sources
I am writing an essay and I have to cite my sources but I don't know how. Can anyone help?
January 14, 2008

Math
Thank you!
January 14, 2008

Math
Letters that fit the rule: A, E, F, H, I, K, L, M, N Letters that do not fit the rule: B, C, D, G, J, O, P What is the rule?
January 14, 2008

government
I have to write an essay on the first three articles of the constitution, do you have any suggestions?
January 14, 2008

King Arthur
What lessons does the legend of King Arthur teach us? Are there any modern day lessons that we can still learn from?
January 14, 2008

English
What is wrong with this sentence. Grammer wise... If he cannot attend the game, an elemental fan, according to an article in SPORTS ILLUSTRATED entitled "Buck Wild For The Bucks", will watch the game on TV with family or friends.
January 13, 2008

King Artur reposted with my answer
Thanks for the websites on heroes. I think that the legend of King Arthur has lasted so long because people are fascinated with the story. It is hard to tell what of the legend is true or not and if King Arhtur really ever existed at all and I think people like to make their ...
January 12, 2008

King Artur reposted with my answer
Why has the story of King Arthur endured for as long as it has? Why does the story appeal to such a wide variety of people? Would King Arthur and the Knights of the Round Table be considered heroes today? For Further Reading King Arthur - GuruBlue, Friday, January 11, 2008 at ...
January 12, 2008

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