Wednesday
February 10, 2016

Posts by Abigail

Total # Posts: 219

chemistry
Please judge my answer Question:A solution of AgNO3 (45 mL/0.45 M) was mixed with solution of NaCl (85 mL/1.35 x 10-2 M) a) Calculate the ion product of the potential precipitate. b) Would a precipitate form? The Ksp of AgCl(s) is 1.8 x 10-10. Answer: For a, doing the ion ...
April 15, 2008

chemistry
Please judge my answer, thank you Question: What is the pH of a 1.24 mol/L solution of HCN(aq) if its Ka = 6.2 x 10-10? Answer: It is imperative to initially set up ionization. THen, it becomes important to write the Ka expression, after which setting up an ICE table becomes ...
April 15, 2008

chemistry
Please judge my answer: Question: 24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5. Answer: The equation for this...
April 15, 2008

chemistry
rats....:)
April 15, 2008

chemistry
Please let me know if my answer to the following question is correct. Question: What is the concentration of a weak base if its Kb = 1.4 x 10-11 and its pH = 8.75? Answer: Converting pH to H^+ concentration using the formula H^+ = 10^-ph, therefore 10^-8.75 gives an H^+ ...
April 15, 2008

chemistry
Please let me know if my answer is correct. Question: A weak base with a concentration of 1.3 mol/L has a percent ionization of 0.72%. What is the Kb of this weak base? Answer: Calling the weak base SHO, SHO --> S^+ plus HO^-. I know that the formula for Kb, therefore, will...
April 15, 2008

chemistry
Please let me know if my answer to the following question is correct. Question: 25 mL of standardized 0.45 mol/L NaOH is titrated with 21 mL of 0.35 mol/L acetic acid. Calculate the pH of the solution. Answer: Add 25 mL and 21 mL to get 46 mL. Add 0.45 mol/L and 0.35 mol/L to ...
April 15, 2008

ALGEBRA WITH PIZZAZZ
anybody have the riddle to why do elephants have ivory tusks.
April 6, 2008

science
Does the mass of tap water change when salt is added.
November 4, 2007

government
So in communism, it is the government that controls the economy whereas in democracy the people control it?
October 25, 2007

government
Do not they both mean that the government is solely in charge, not the people?
October 25, 2007

government
What is the difference between a totalitarian and a communist government? Thank you!
October 25, 2007

social studies-Ms. Sue
Thanks a million!
October 22, 2007

social studies-Ms. Sue
"Immigrants have frequently been accused of taking jobs from "real" Americans. Politicians who oppose immigrants often use this as a reason. The problem with this argument is that many immigrants work very hard for minimum (or lower) wage that doesn't ...
October 22, 2007

social studies
Is there a specific reason why these politicians like to use immigrants as a scapegoat?
October 22, 2007

social studies
According to Wikipedia, "the problems which are purportedly caused by immigrants equally exist amongst native-born populations as well, and that politicians often use immigration as a convenient scapegoat to distract the public from real social, political and economic ...
October 22, 2007

Calculus
How do you prove area of a circle? Integrate an incremental area dArea = r dr dTheta from r=0 to R, and Theta from zero to 2PI radians. Area= INT INT dTheta rdr dTheta Area= 2PI (1/2 R^2)= PI R^2
March 1, 2007

social studies
gender issues applied to learning and development Boys’ stereotypes in k-12 to Grade 2 . How these issues will affect boys’ learning and development? Girls’ stereotypes in K-12 TO Grade 2. – How these issues will affect girls’ learning and development...
December 6, 2006

science
tell me about the carbon cycle. what are the steps in it? http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/C/CarbonCycle.html
October 31, 2006

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