# Curtis

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

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

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

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

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

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.

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?

8. ## chemistry

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

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

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

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

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

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?

14. ## yr7 english

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

15. ## Math

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

16. ## math

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

17. ## Math

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

18. ## Geometry

Finish pattern George John Thomas John

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)?

20. ## algebra

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

21. ## Math

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

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?

23. ## Spelling

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

24. ## chemistry

Thanks for the Help

25. ## science

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

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

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

Meseals

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') plt.show()

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

Northeast for sure.

posted on January 31, 2016
8. ## Math

8.3

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

18

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