Most popular questions and responses by Curtis
  1. Chemistry

    I need to know if I am anywhere in solving this problem: Please tell me if this is correct. The pH of a solution: 0.20 M CH3COOH and 0.10 M CH3COONa pH=pKa+log{[CH3COONa]/[CH3COOH]} pH= -log(1.8x10-5)+log{0.10/0.20} pH= 4.74+log 0.50= 4.74-0.30= 4.44

    asked on May 6, 2010
  2. Geometry

    Isosceles triangle ABE of area 100 square inches is cut by CD into an isosceles trapezoid and a smaller isosceles triangle. The area of the trapezoid is 75 square inches. If the altitude of triangle ABE from A is 20 inches, what is the number of inches in

    asked on July 9, 2017
  3. math

    You play video games online. When you sign up with the game site, you get 400 points. You earn 50 more points for each hour that you play. How many hours do you have to play to get to 1,000 points

    asked on April 23, 2019
  4. Business Communication

    Summarize the 3x3 writing process and explain how it guides a writer

    asked on November 10, 2014
  5. chemistry

    A buffer solution contains 0.283 M hypochlorous acid and 0.456 M potassium hypochlorite. If 0.0464 moles of perchloric acid are added to 225 ml of this buffer, what is the pH of the resulting solution ? (Assume that the volume change does not change upon

    asked on July 2, 2014
  6. Analy Chem

    Consider the titration of 100.0 mL of 0.110 M NaOH with 1.00 M HBr. Find the pH at the following volumes of acid added and make a graph of pH versus Va:Va = 0,2,5,8,10,10.1,11,11.1, and 12mL. Compute Ve, first.

    asked on April 11, 2012
  7. Physics

    Wind is blowing toward south at 8m/s, a runner jogs west at 7 m/s. What is the velocity (speed and direction) of the air relative to the runner?

    asked on February 2, 2014
  8. chemistry

    What is the pH of a solution that is 0.20 M CH3COOH and 0.10 M CH3COONa?

    asked on May 4, 2010
  9. chemistry

    At room temperature the equilibrium constant Kc for the reaction: 2NO(g)=N2(g)+O2(g) is 1.4x10^30. In the atmosphere at room temp. the concentration of nitrogen gas is 0.33 mol/L and the concentration of oxygen gas is about 25% that value. Calculate the

    asked on April 8, 2010
  10. CT

    I need help identifying the following things in the article. 1. Identify any examples of bias presented by the author. 2. Identify any areas that are vague or ambiguous. 3. Do you find the source credible? 4. Identify and name any rhetorical devices used

    asked on May 28, 2008
  11. Chemistry II

    The equlibrium constant Kc for the reaction: has the value of 4.00 at 500K. If a mixture of 1.00 mol CO and 1.00 mol H2O is allowed to reach equilibrium at this temperature in a 1.00L flask, calculate the equilibrium concentrations of each species in the

    asked on April 11, 2010
  12. Math Algebra 2

    Mr. Mullett has designed a playground for his 4 kids. This playground is awesome. The playground equipment is top of the line, multiple slides, swings, climbing wall and the playground area also includes a trampoline. What he doesn’t have is a sidewalk

    asked on September 3, 2012
  13. Math

    the banks contains quarters , dime and nickels. The number of dimes is 1 less than the number of nickels. The number of nickels is 2 more than twice the number of quarters. The coins are worth $5.70. How many nickels are there?

    asked on October 30, 2011
  14. yr7 english

    in the sentence The Eiffel Tower is in France is it right to put a capital letter for tower? thanks

    asked on February 9, 2009
  15. Math

    A banner has the length of 10 feet and the area of 7 square feet what is the width of the banner

    asked on January 7, 2016
  16. math

    Anna uses 4/5 of vinegar in her salad dressing recipe.How much vinegar would Anna use to make 2 recipes?

    asked on December 3, 2013
  17. Math

    x^2 + 5x -10= 0 has 2 solutions A and B where A < B and A = ? and B = ?

    asked on September 4, 2012
  18. Geometry

    Finish pattern George John Thomas John

    asked on August 13, 2012
  19. Math Question

    What is the probability that at least two(2) of the nine(9) US Supreme Court Justices have the same birth date (month and day)?

    asked on September 21, 2011
  20. algebra

    (1/(1+x))+(1/x) Factor

    asked on April 7, 2011
  21. Math

    40-4k to the powerr of 3 for k=2

    asked on March 23, 2016
  22. Algebra 2

    An object 3.6 feet tall casts a shadow that is 10.8 feet long. How long in feet would the shadow be for an object which is 13.2 feet tall?

    asked on July 30, 2014
  23. Spelling

    W m v c a e e q I need a word using q and some of these letters

    asked on October 4, 2010
  24. chemistry

    Thanks for the Help

    asked on May 6, 2010
  25. science

    how much energy is needed to heat 3kg of aluminium from 21 oC to 50 oC?

    asked on September 4, 2009
  26. Statistics

    Mortgage Rates In 2001, the mean contract interest rate for a conventional 30-year first loan for the purchase of a single-family home was 6.3 percent, according to the U.S. Federal Housing Board.A real estate agent believes that interest rates are lower

    asked on May 4, 2008
  1. English

    I am for the motion ,even though a kitchen is a place for females ,boys should also help because what if they get married and their wifes come home late and tired and your kids are hungry what will you do will you take them to a restaurant? so there is a

    posted on June 16, 2019
  2. Diseases- SS


    posted on September 25, 2017
  3. American Government

    Ana Bear

    posted on June 12, 2017
  4. Educational Technology

    nibba is 100% right^^^

    posted on June 7, 2017
  5. math

    import matplotlib.pyplot as plt plt.plot([1,2,3,4]) plt.ylabel('some numbers')

    posted on September 30, 2016
  6. Algebra 2

    Actually this one was easy for me. You just need to find which probability matches the data for the chance of both trials being a success, which you can figure out by choosing an answer and then using that answer to fill in the gaps in the formula to find

    posted on September 15, 2016
  7. 8th grade

    Northeast for sure.

    posted on January 31, 2016
  8. Math


    posted on December 2, 2014
  9. Math Algebra 2

    its a big horizontal rectangle with a smaller rectangle on the bottom of it

    posted on September 3, 2012
  10. chemistry

    Please tell me if this is correct. The pH of a solution: 0.20 M CH3COOH and 0.10 M CH3COONa pH=pKa+log{[CH3COONa]/[CH3COOH]} pH= -log(1.8x10-5)+log{0.10/0.20} pH= 4.74+log 0.50= 4.74-0.30= 4.44

    posted on May 5, 2010
  11. Chemistry II

    Kc=(x)(x)/(1-x)(1-x) What is x in this equation and is is 4.0 Kc?

    posted on April 13, 2010
  12. 10th grade Geometry


    posted on January 3, 2010
  13. science

    it didn't give me any help at all could you please help me in another way and maybe find me out the answer

    posted on September 6, 2009
  14. CT

    1. I believe that the author has a bias because of the following quote. "Compared with a wide range of other programs and efforts to reduce drinking among teenagers, increasing the legal age for purchase and consumption of alcohol to 21 appears to have

    posted on May 29, 2008
  15. science

    1. Charging by Friction 2. Charging by Induction 3. Charging by Conduction

    posted on May 28, 2008
  16. CT

    I have identified that the article is biased towards keeping the MLDA the same.

    posted on May 28, 2008