Monday

June 27, 2016
Total # Posts: 2,277

**chemistry**

A 0.446 g- sample of an unknown monoprotic acid was titrated with 0.105 M KOH. the molar mass is 120 g/mol What is the pKa value?
*November 22, 2010*

**math**

Three rectangles have exactly the same area. The dimensions of each rectangle (as length and width) are a and b; a – 3 and b + 2; and a + 3 and b – 1. Find the area of the rectangles.
*November 17, 2010*

**math**

A painter leans a ladder against a vertical wall. The top of the ladder is 7 meters above the ground. When the bottom of the ladder is moved 1 meter farther away from the wall, the top of the ladder is 5 meters above the ground. What is the length of the ladder? Round to the ...
*November 17, 2010*

**calculus**

Find all relative extrema and points of inflection of the function: f(x) = sin (x/2) 0 =< x =< 4pi =< is supposed to be less than or equal to. I can find the extrema, but the points of inflection has me stumped. The inflection point is (2pi,0) but shouldn't there ...
*November 14, 2010*

**10th grade**

If m<pqs=3x+13and m<sqt=6x-2,
*November 13, 2010*

**electrical**

does anyone have the exam answers to exam 00603300
*November 11, 2010*

**electrical**

penn foster exam 00603300
*November 11, 2010*

**Accounting**

Complete exercises 2-1 and 2-2 on pp. 95-98 of Computer Accounting with Peachtree Complete® 2010 using Peachtree.
*November 11, 2010*

**College Chemistry**

Entropy will be greater than 0 right, since there is more disorder in the gaseous state? What about the Enthalpy?
*November 9, 2010*

**College Chemistry**

Predict the signs of delta H (Enthalpy) and delta S (Entropy) for the evaporation of water at 85 C.
*November 9, 2010*

**physics**

Two children seat themselves on a seesaw, the one on the left has a weight of 400N whlie the one on the right weighs 300N. The fulcrum is at the midpoint of the seesaw, if the child on the left is not at the end but is 1.5m from the fulcrum, and the seesaw is balanced, what is...
*November 9, 2010*

**public administration**

i dont know where to begin to answer these questions and this is something we have not gone over in class yet!
*November 7, 2010*

**public administration**

Assume that after all the rhetoric and great debates on health care reform that Congress decided the rate regulation that has been used for a century to control the prices and services of common carriers in transportation is an appropriate model. It therefore established the &...
*November 7, 2010*

**college**

creating a slide on debunking gender misconception any tips
*November 4, 2010*

**physics**

A person is riding a bicycle, and its wheels have an angular velocity of +15.5 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is +15.5 revolutions. (a) How much time does it take for the ...
*November 3, 2010*

**math**

The earth has a radius of 6,380 km. The formula for the volume of a sphere is �� V = 4/3 ðx^3, and the formula for surface area of a sphere is A = 4ðx^2 . Find the volume and surface area of the earth and write the answer in scientific notation with two ...
*November 3, 2010*

**chemistry**

How many mL of 0.25 M H2SO4 can be made from 50.0mL of 0.50 M H2SO4? Also in this case, what does the capital M stand fro?
*November 2, 2010*

**science**

if a thermometer contained a gram of mercury, how much would the volume of the mercury change when the temperature rose from 0 degrees celcius to 30 degrees celcius?
*November 1, 2010*

**chem 30**

Do you have a textbook?
*November 1, 2010*

**11th grade**

Those liquids with higher boiling points do not boil well, often steaming off quickly
*October 31, 2010*

**chemistry**

The solubility of barium nitrate at 100°C is 34 g/100 g of H2O and at 0°C is 5.0 g/100g of H2O. If you start with 100 g of Ba(NO3)2 and make a saturated solution in water at 100°C, how much water is required? If the saturated solution is cooled to 0°C, how much...
*October 29, 2010*

**Ecology**

4. c 5. a 6. c 7. b 8. a 9. b 10.c
*October 29, 2010*

**physics**

A vector is 100 units long and makes an angle of 50 degrees with the positive x-axis. find the x and y components of this vector.
*October 28, 2010*

**project management**

i have to write a 50-100 word summary for a final project proposal being the project manager.any ideas what kind of projects i can use?
*October 26, 2010*

**Physics**

A 1030 kg car is pulling a 360 kg trailer. Together, the car and trailer have an acceleration of 2.07 m/s2 directly forward. How do you find net force on the car and trailer?
*October 23, 2010*

**IT**

Service Request SR-kf-013 5 page section of the paper. This should include: o Testing Process Summary: Define a test plan or script that identifies major software functionality and hardware to be tested along with the required outcomes. o Installation Process and Training Plan...
*October 22, 2010*

**IT**

Service Request SR-kf-013
*October 22, 2010*

**College Chemistry**

"A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH determined to be 0.110 M. For the second titration, the student correctly diluted 6 M HCl from the reagent shelf using a graduated cylinder to obtain...
*October 20, 2010*

**Chemistry**

The Question Is: "A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH determined to be 0.110 M. For the second titration, the student correctly diluted 6 M HCl from the reagent shelf using a graduated ...
*October 20, 2010*

**College Chemistry**

Can anyone give me an update on this?
*October 19, 2010*

**College Chemistry**

Anyone know if my answer is correct?
*October 19, 2010*

**College Chemistry**

The Question Is: "A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH determined to be 0.110 M. For the second titration, the student correctly diluted 6 M HCl from the reagent shelf using a graduated ...
*October 19, 2010*

**College Chemistry**

Would i divide the M and then multiply by Ka?
*October 19, 2010*

**College Chemistry**

"What is the pH of a solution that is 0.50 M in sodium acetate and 0.75 M in acetic acid? (Ka for acetic acid is 1.85 x 10-5)." Would i use the Ka expression formula??
*October 19, 2010*

**math**

A(-3,-2) B(8,4)are the ends of the diameter of a circle. the tangent of the circle at point B is -11x+6y+64=0 the line L passes through A and the origin. line L has a gradient of 2/3 what is the coordinates that the line L and tangent at point B cross?? (this question had 4 ...
*October 18, 2010*

**math**

A(-3,-2) B(8,4)are the ends of the diameter of a circle. the tangent of the circle at point B is -11x+6y+64=0 the line L passes through A and the origin. line L has a gradient of 2/3 what is the coordinates that the line L and tangent at point B cross?? (this question had 4 ...
*October 18, 2010*

**math**

A(-3,-2) B(8,4)are the ends of the diameter of a circle. the tangent of the circle at point B is -11x+6y+64=0 the line L passes through A and the origin. line L has a gradient of 2/3 what is the coordinates that the line L and tangent at point B cross?? (this question had 4 ...
*October 18, 2010*

**math**

A(-3,-2) B(8,4)are the ends of the diameter of a circle. the tangent of the circle at point B is -11x+6y+64=0 the line L passes through A and the origin. line L has a gradient of 2/3 what is the coordinates that the line L and tangent at point B cross?? (this question had 4 ...
*October 18, 2010*

**math**

A(-3,-2) B(8,4)are the ends of the diameter of a circle. the tangent of the circle at point B is -11x+6y+64=0 the line L passes through A and the origin. line L has a gradient of 2/3 what is the coordinates that the line L and tangent at point B cross?? (this question had 4 ...
*October 18, 2010*

**math**

A(-3,-2) B(8,4)are the ends of the diameter of a circle. the tangent of the circle at point B is -11x+6y+64=0 the line L passes through A and the origin. line L has a gradient of 2/3 what is the coordinates that the line L and tangent at point B cross?? (this question had 4 ...
*October 18, 2010*

**math**

A(-3,-2) B(8,4)are the ends of the diameter of a circle. the tangent of the circle at point B is -11x+6y+64=0 the line L passes through A and the origin. line L has a gradient of 2/3 what is the coordinates that the line L and tangent at point B cross?? (this question had 4 ...
*October 18, 2010*

**math**

A(-3,-2) B(8,4)are the ends of the diameter of a circle. the tangent of the circle at point B is -11x+6y+64=0 the line L passes through A and the origin. line L has a gradient of 2/3 what is the coordinates that the line L and tangent at point B cross?? (this question had 4 ...
*October 18, 2010*

**HEALTH-P.E.**

HOW CAN A FITNESS LEVEL AFFECT A TWELVE YEAR OLD BOY PHSICALLY, EMOTIONALLY, FINANCIALLY, AND SOCIALLY?
*October 13, 2010*

**math**

The Mayan Empire, which ruled Central America for centuries, had two calendars. One calendar was the same as ours, 365 days long (without leap year). The other calendar was 270 days long, the length of a woman's pregnancy. If both start on day one at the same time, then ...
*October 13, 2010*

**health fitness**

how does my fitness lever affect me physically, emotionally, financially, and socially?
*October 12, 2010*

**physics**

A 155 N box is placed on an inclined plane that makes a 30.0° angle with the horizontal. Find the component of the weight force parallel to the plane's surface.
*October 12, 2010*

**5th grade math**

949864
*October 11, 2010*

**health**

how does socioeconomics and educational opportunity are main reason for health disparities?
*October 11, 2010*

**physics**

A 0.80-kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.7 m on a frictionless horizontal surface.If the cord will break when the tension in it exceeds 90 N, what is the maximum speed the ball can have? Express your answer using two ...
*October 11, 2010*

**COM 156**

Help with writing an outline on renting vs buying
*October 11, 2010*

**statistics**

what is the level of measurement for the following question? 1) the SAT scores for the GEORGE W BUSH white house staff. is it nominal, interval, ordinal, or ratio? Why?
*October 10, 2010*

**statistics**

what is the level of measurement for the following question? 1) the SAT scores for the GEORGE W BUSH white house staff. It is nominal, interval, ordinal, or rational? Why?
*October 10, 2010*

**Physical science**

what is refraction?
*October 9, 2010*

**US History**

How did the federalists and the Jeffersonian republicans differ in their opinion of how the constitution should be interpreted? if a link to a page i can read is provided i'd be extremely grateful otherwise just answer is somewhat fine
*October 7, 2010*

**Social Studies**

I know for sure that #1 is A. Churches and #5 is C. 35% (or one third of Americans). Rest, I'm not so sure on.
*October 7, 2010*

**algebra**

m=-3 passing through p(3.5)
*October 6, 2010*

**3rd grade**

using four different digits, what is the least sum you can get when you add two digit numbers?
*October 5, 2010*

**Math **

the first one is 8 inside the path #'s 10-2= and 6+2=8
*October 5, 2010*

**accounting**

The two cases described below are independent of each other. Each case provides the information necessary to prepare the stockholders' equity section of a corporate balance sheet. a. Early in 2007, Wesson Corporation was formed with the issuance of 50,000 shares of ...
*October 3, 2010*

**algebra**

what do i do
*September 30, 2010*

**Math**

how many people can receive equal $16 shares from a total of $496
*September 30, 2010*

**algebra**

evaluate the exprression 90/x for the given values of x to complete the table x 2 3 5 9 15 18 20
*September 28, 2010*

**1st grade**

My son is gay and i whip him
*September 27, 2010*

**english**

Mood and tone! can someone kindly and effectively explain the difference.I am lost completely.Help!
*September 24, 2010*

**Algebra**

I can't figure out the answer to question: When you subtract -2c+3d from 5c-7d
*September 24, 2010*

**history**

what factors most influenced colonial development
*September 23, 2010*

**math**

-3.38+r-9.76 Solve, I think the answer is 2/8.
*September 22, 2010*

**math**

how do you solve this equation.
*September 22, 2010*

**math**

s+5/8=7/8
*September 22, 2010*

**math**

s+5/8=7/8
*September 22, 2010*

**math**

Using the following six digits, 1, 2, 4, 6, 8, and 9, fill in the blanks below to make the maximum product that you can. Use each digit only once. How does an understanding of place value help determine the best solution to this problem? __ __ __ x __ __ __
*September 22, 2010*

**Math**

Using the definition for the Fourier transform, prove that this operation is linear.
*September 22, 2010*

**PHYSICS**

Taylor Swift leaves Philadelphia for a concert in Dallas. Kellie Pickler leaves at the same time, but in a different tour bus. After 2 hours, Taylor's bus has traveled 50% further than Kellie's bus. If Taylor's bus is going 30mph faster than kellies's bus, how ...
*September 21, 2010*

**Aberdeen**

A model rocket is launched straight upward with an initial speed of 40.0 m/s. It accelerates with a constant upward acceleration of 2.50 m/s2 until its engines stop at an altitude of 120 m.
*September 20, 2010*

**science**

2000000
*September 20, 2010*

**ALGEBRA...[HELPP!!]**

Arianna kicks a soccer ball off the ground and in the air with an initial velocity of 42 feet per second. Approximately what maximum height does the soccer ball reach?
*September 16, 2010*

**accounting 101**

Preparing A Journal Entry. I need help telling whether it's accounts receivable, rent expense, etc. Also determining whether it's debit or credit. I understand everything else like the T-account and Trial Balance, just determining what they are is what I'm having ...
*September 16, 2010*

**Chemistry**

Yes in fact it is. So does that mean that the time it takes for the concentration to decrease to 0.180 mol/l would just be k then since its a zero order?
*September 14, 2010*

**Chemistry**

The rate law of a reaction, A-> B+C is given by the expression: Rate=k, where k=0.0113 mol/L min. If the initial concentration of the reactant is 0.225 mol/L, how long does it take for the concentration to decrease to 0.180 mol/L? I know i have to find the order of the ...
*September 14, 2010*

**calculus**

Find the limit L. Then find delta > 0 such that |f(x) - L| < 0.01 whenever 0 < |x-c| < delta. lim x -> 4 (4- (x/2))
*September 14, 2010*

**algebra 1b**

Arianna kicks a soccer ball off the ground and in the air with an initial velocity of 42 feet per second. Approximately what maximum height does the soccer ball reach?
*September 14, 2010*

**College Chemistry**

Help Please.
*September 14, 2010*

**College Chemistry**

This is based on the Collision theory.
*September 14, 2010*

**College Chemistry**

Which of the following changes generally lead to greater reaction rates? (I)Increasing the temperature (II)Decreasing the concentration of a reactant or (III) adding a catalyst I know that change in temperature influences the reaction, in this case it speeds up and that adding...
*September 14, 2010*

**algebra**

In 1995, the life expectancy of males in a certain country was 70.1 years. In 1999, it was 73.6 years. Let E represent the number of years since 1995. The linear function E(t) that fits the data is E(t) =_____ t +______.(Round to the nearest tenth) Use the function to predict ...
*September 14, 2010*

**chemistry**

30.2 g
*September 11, 2010*

**chemistry**

How many grams of na3po4 will be needed to produce 425ml of a solution that has a concentration of na+ ions of 1.30 M?
*September 11, 2010*

**math**

5x=-15
*September 11, 2010*

**scientist**

Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ...
*September 10, 2010*

**Chemistry**

(3.9)*(0.9025J)*(Tfinal-99.3)+(10)*(4.184J)*(Tfinal-22.6)=0 (3.51975J)*(Tfinal-99.3)+(41.84J)*(Tfinal-22.6)=0 45.35975JTfinal-1295.095175=0 1295.095175/45.35975=28.6 degrees celsius
*September 10, 2010*

**math**

Saturn is 6 times further from the Sun than Mars. Define a variable and write and expression for the distance of Saturn from the Sun. Not the same person
*September 8, 2010*

**Physics (Oscillation)**

If a particle moves in simple harmonic motion with a frequency of 3.00 Hz and an amplitude of 5.00 cm through what total distance does the particle move during one cycle of its motion, what is its maximum speed, where does this maximum speed occur and what and where does the ...
*September 8, 2010*

**com155**

So how did you do on this? I have the same assignemnt but I have come up with different answers than yours. How did you do?
*September 8, 2010*

**Chemistry**

Thanks I just figured it out too. I appreciate your help.
*September 7, 2010*

**Chemistry**

A solution is prepared by dissolving 5.00g of an unknown molecular solid in water to make 500 ml of solution. The osmotic pressure of the solution is 1.61 atm at 25 degrees C. What is the molar mass of the solute? This is what ive done so far: M= 1.61atm/(0.0821Lxatm/molxK)(...
*September 7, 2010*

**algebra**

solve algebraically x^2 + y^2 = 16 x - y = 4
*September 6, 2010*

**algebriacally.**

x^2 - y^2 = 9 y = 4
*September 6, 2010*

**equation**

Solve algebraically and check y = x^2 - 3 x + y = -1
*September 6, 2010*

**IT/Business/Law?**

Do I have to register for copyright protection of works of art including writing, photographs and digital images?
*September 5, 2010*

**science**

an object will accelerate in free fall because the only force accting on it is gravity True or false
*September 3, 2010*