Questions Asked on February 16, 2009

Arsenic acid (H3AsO4) is a triprotic acid with Ka1 = 5 10-3, Ka2 = 8 10-8, and Ka3 = 6 10-10. Calculate [H+], [OH -], [H3AsO4],
1. 15 answers
2. asked by Cab
3. 9,846 views
Calculate the concentrations of all species present in a 0.33 M solution of ethylammonium chloride (C2H5NH3Cl).Okay so i tried
1. 5 answers
2. asked by Spencer
3. 5,076 views
a 1600-kg vehicle moves with a velocity of 19.5 m/s. calculate the power required to reduce the velocity to 3.20 m/s in 11.0 s
1. 1 answer
2. asked by bob
3. 3,271 views
a bus company has 4000 passengers daily, each paying a fare of $2. for each $0.15 increase, the company estimates that it will
1. 1 answer
2. asked by Amanda
3. 3,108 views
The general formula for moment of inertia is:I = Sigma mi * ri^2 (mi is mass of atom, ri is distance to axis of rotation) In a
1. 2 answers
2. asked by chemstudent
3. 2,465 views
At 25°C, K = 0.090 for the following reaction:H2O(g) + Cl2O(g) 2 HOCl(g)Calculate the concentrations of all species at
1. 1 answer
2. asked by Lindsey
3. 2,435 views
A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research
1. 4 answers
2. asked by help!
3. 2,234 views
According to legend, to determine whether the king's crown was made of pure gold, Archimedes measured the crown's volume by
1. 2 answers
2. asked by y912f
3. 2,102 views
i need help.Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like
1. 1 answer
2. asked by Lindsey
3. 2,036 views
The curve with equation y = ax^2 + bx + c passes through the points P(2,6) abd Q(3,16), and has a gradient of 7 at the point P.
1. 1 answer
2. asked by Anonymous
3. 2,034 views
in which landscape region is Ithaca, New york?1 Appalachian Plateau. 2 Adirondack Mountains 3 Catskill mountains 4 St. Lawrence
1. 2 answers
2. asked by Anonymous
3. 1,962 views
A sample of conc. nitric acid has a density of 1.41g/ml and contains 70% HNO3 by mass.What mass of HNO3 is present per L of
1. 3 answers
2. asked by Tree Frog
3. 1,776 views
The pH of a 1.00 10-3 M solution of pyrrolidine is 10.82. Calculate Kb.i keep getting anumber that is ^ (positive) and that's
1. 1 answer
2. asked by Jennifer
3. 1,542 views
1. ¿Cómo es Felipe?2. ¿Son los chicos buenos amigos? ¿Por qué? 3. ¿Cómo son los amigos de tu clase? Please help me
1. 2 answers
2. asked by Larry
3. 1,539 views
¿Qué piensas?1. ¿De dónde es el (la) maestro (a) de español? Mí la maestra de español es de México 2. ¿Qué les gusta
1. 3 answers
2. asked by Larry
3. 1,466 views
Which pair of points lie on a line with an undefined slope?a. (0,4) (4,0) b. (0,2) (2,2) c. (4,0) (4,4) d. (4,4) (2,2)
1. 4 answers
2. asked by Anonymous
3. 1,445 views
I am doing my essay on drugs use among teens I need someone one to look at my thesis here is my out line. and i need a
1. 2 answers
2. asked by Gertrude Sanders
3. 1,274 views
I have a homework assignment due tomorrow consisting of true/false questions. Would someone please review my answers and see if
1. 5 answers
2. asked by Amy
3. 1,264 views
"The sum of two measures of two angles is 180 degrees. What is the measure of each angle if one angle is 30 degrees more than
1. 7 answers
2. asked by Mel
3. 1,256 views
Which expression represents the pharse "ten less than the product of 5 and the sum of a number and 2"?a. 10-5x+2 b. 5(x+20)-10
1. 2 answers
2. asked by Anonymous
3. 1,249 views
i have to write a descriptive passage from one of the characters perspective in 'To Kill a Mockingbird' about a place and
1. 1 answer
2. asked by girly93
3. 1,193 views
Which of the following rocks is the most and least resistant when it comes to weathering?Granite Basalt Gineiss Sandstone
1. 4 answers
2. asked by Mary Claire
3. 1,159 views
When the roller coaster is at the top of the loop, why doesn’t the person fall off the roller coaster?What forces are acting
1. 2 answers
2. asked by jessie
3. 1,138 views
write down the uncertainty in the volume of the cylinder (3.36*10^-2)write down the minimum uncertainty with which the volume of
1. 1 answer
2. asked by Anna
3. 1,077 views
I have to find the percentage of error. The accepted value is 11.35, while the value I got is 2.564. I got 2.564-11.35/11.35,
1. 2 answers
2. asked by Coralie
3. 1,069 views
I have to identify and discuss what approach (ego psychology, behaviorism, cognitive-behaviorism, and crisis intervention) would
1. 0 answers
2. asked by Linda
3. 1,037 views
Solve by elimination method.0.3x – 0.2y = 4 0.5x + 0.5y = 85/19
1. 2 answers
2. asked by Anonymous
3. 1,031 views
1) Laura McCarthy, the owner of Riverside Bakery, has been approached by insurance underwriters trying to convince her to
1. 2 answers
2. asked by Stuart
3. 1,018 views
solve each equation for 0=/<x=/<2pisin^2x + 5sinx + 6 = 0? how do i factor this and solve? 2sin^2 + sinx = 0 (2sinx - 3)(sinx
1. 7 answers
2. asked by sh
3. 1,011 views
Both writers make valid points in their essays regarding moral decline. Robert H Bork points out in his essay, Modern Liberalism
1. 4 answers
2. asked by Amy
3. 992 views
what is the difference between a compressional wave with a large amplitude and one with a small amplitude
1. 1 answer
2. asked by jennie
3. 938 views
A hollow plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake. The sphere
1. 1 answer
2. asked by Amanda
3. 927 views
Two percent of the circuit boards manufactured by a particular company are defective. If circuit boards are randomly selected
1. 0 answers
2. asked by Nishi
3. 906 views
A heavy bank-vault door is opened by the application of a force of 3.0 10^2N directed perpendicular to the plane of the door at
1. 1 answer
2. asked by y912f
3. 899 views
A particular household ammonia solution ( d= 0.97 ) is 6.8% NH3 by massHow many milliliters of this solution should be diluted
1. 3 answers
2. asked by Kyle
3. 883 views
A hollow plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake. The sphere
1. 1 answer
2. asked by Amanda
3. 832 views
What are the current changes in U.S. policies concerning the treatment of Muslim and Arabic Americans?
1. 3 answers
2. asked by Joy
3. 824 views
Summarize the issues that divided Martin Luther from the Catholic Church.and how did Luther'ss theological teachings redefine
1. 7 answers
2. asked by A-tan
3. 816 views
5.A) Kwame sells ice cream cones at the country fair. He has to rent the equipment for $29 and spend $0.43 on ingredients for
1. 2 answers
2. asked by Samantha
3. 815 views
NEWW-0.10 M methylamine (CH3NH2) kb= 4.38e-4 calc the percent ionization so i did the ICE table to find that x=6.62e-3 (that was
1. 1 answer
2. asked by Spencer
3. 813 views
Miranda v. Arizona casehow is the 14th amendment implicated in this case? how did the court go beyond its usual practice in
1. 8 answers
2. asked by coco
3. 811 views
I got stuck on this problem and I cannot figure out what to do or explain this problem. Please help me with this problem.The
1. 1 answer
2. asked by shylo
3. 789 views
i wrote a sample sat essay... can you guys just give me some feedback as to how i should work to get my essays score higher?PROM
1. 4 answers
2. asked by William
3. 765 views
What is the difference between cash basis and accrual basis accounting?Why do accrual-basis financial statements provide more
1. 0 answers
2. asked by PARADISE
3. 763 views
i need help.Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like
1. 1 answer
2. asked by Lindsey
3. 757 views
Answer the following for a primitive cubic unit cell. Answers should be numerical, set r = 7.0.edge in terms of r, the lattice
1. 1 answer
2. asked by leah
3. 746 views
I need help bad with the followingUse at least three sources—other than the text for this course—to support your plan.
1. 5 answers
2. asked by troyer0269
3. 719 views
does someone know a good translator online (english-polish)thanks alot for help :)
1. 6 answers
2. asked by Wiola
3. 712 views
I'm confused as how to find the current for a circuit with both parallel and series resistors?R1 = 2 Ù R2 = 5 Ù R3 = 11 Ù R4
1. 4 answers
2. asked by c
3. 704 views
What is the pH of a solution made up of 50cm^3 of 1M Ethanoic Acid and 25cm^3 of 1M sodium ethanoate? Assume Ka for Ethanoic
1. 1 answer
2. asked by Alice
3. 691 views
I have to rewrite the fraction without an exponent, but I'm not for sure how to do the negative exponent. pls help!(3/2)^-2
1. 1 answer
2. asked by jake
3. 687 views
What different physical arrangements have you seen in the classrooms you’ve observed? Which arrangements seem most effective?
1. 3 answers
2. asked by luli
3. 684 views
please check my answer for this questionWhat problems in the North led to reform movements of the early 1800s? Poverty,
1. 0 answers
2. asked by Bella
3. 684 views
i need help thinking of Criterion for my evaluative essay..i'm writing on a piece of literature..i need to write what criteria
1. 2 answers
2. asked by Bella
3. 682 views
In my journal, I've divided several pages into two columns. In the first column I write down selected quotations from an essay
1. 2 answers
2. asked by Bunnie
3. 677 views
If I have a 9V circuit, with:2 resistors in parallel; followed by: 2 single resistors in series; and I calculate the effective R
1. 3 answers
2. asked by charlie
3. 675 views
I'm writing a story and I have very mean character and this character is having an argument with his brother. They are throwing
1. 2 answers
2. asked by anna
3. 662 views
If I had two unknown chemicals (in solid form) mixed together, how could I go about identifying the individual components of the
1. 4 answers
2. asked by ~christina~
3. 662 views
I don't even know where to begin with this problem.multiply (2y+5w+6)(5y+5w-4)
1. 3 answers
2. asked by kevin
3. 658 views
Im post this question again. Please, let there be some responseYou are employed in the marketing department of The Mobile Phone
1. 3 answers
2. asked by VICTOR
3. 651 views
describe the effect of cyanide and arsenic on cellular repiration. Include the effect of these poisons on the electron transport
1. 0 answers
2. asked by Caleb
3. 650 views
50 mL of 1.50* 10^-2 M HI(aq) is mixed with 75.00 mL of 1.10* 10^-2 M KOH(aq).What is the pH of the Final solution
1. 1 answer
2. asked by reena
3. 648 views
Are these true or false:1. Thoreau argued that the legitimacy of democratic laws demanded obedience and represented a higher law
1. 5 answers
2. asked by Anna
3. 647 views
Adding Rational Expressions1. 4m-2/3m+2 + 6m -4/ 3m+2=
1. 3 answers
2. asked by jaz
3. 643 views
I need some help with find information on what are the implications for patients? What types of reform efforts are being
1. 5 answers
2. asked by Nikia walker
3. 642 views
What are some questions I can ask at an interview with a potato chip lover? Like, what are good questions, where the answer I
1. 3 answers
2. asked by Angie
3. 642 views
To welcome a child who doesn't speak English, it would be appropriate toA. ask the child to repeat words B.tell the child not to
1. 2 answers
2. asked by Cynthia
3. 638 views
How would the following errors affect the account balances and the basic accounting equation, Assets = Liabilities + Owners'
1. 0 answers
2. asked by mary
3. 631 views
Translate to an algebraic expression;the product of 48% and some number; use y to represent some number.
1. 2 answers
2. asked by stephen
3. 623 views
show that f(x) = x^2-1 (x is greater than and equal to 0) and g(x) = root(x-1) (x is greater than and equal to -1) are inverse
1. 2 answers
2. asked by joey
3. 620 views
A 0.23 M sodium chlorobenzoate (NaC7H4ClO2) solution has a pH of 8.68. Calculate the pH of a 0.23 M chlorobenzoic acid
1. 1 answer
2. asked by Jake
3. 616 views
which region in new york state has the greatest topographic relief?1 the hidson-mohawk lowlands 2 the atlantic coastal plain 3
1. 5 answers
2. asked by Anonymous
3. 615 views
1) Straight-Line Method2) Declining-Balance Method 3) Double-Declining-Balance Method 4) Sum-of-the-Year's digits Method What
1. 0 answers
2. asked by China
3. 614 views
This problem really bugs me and I did figure out the diagram but I cannot figure out the wavelength. Please help me with this
1. 1 answer
2. asked by shylo
3. 614 views
I need to know about congruent angles IN vertical angles for a test tomorrow.
1. 3 answers
2. asked by Austin
3. 614 views
"According to current research and news reports, what are some of the changes the U.S. has make to policies concerning the
1. 1 answer
2. asked by Joy
3. 610 views
The basis of a good child-guidance system is the caregiver'sA. arrangement of space in the facility. B. knowledge of child
1. 2 answers
2. asked by Brenna
3. 608 views
I'm currently a sophomore, and I need to plan a science course for next year. Do you know if colleges require physics? Would a
1. 1 answer
2. asked by Coralie
3. 605 views
For the exponential function ex and logarithmic function log x, graphically show the effect if x is doubled.I am having trouble
1. 1 answer
2. asked by Mario
3. 600 views
solve for 0=/<x<2pi6sin^2x + sinx - 1 = 0 Ahh, forgot how to factor. 3cos^2 - 2cos - 1 = 0 (3cosx + 1 )(cosx - 1) cosx= -1/3, 1
1. 3 answers
2. asked by sh
3. 593 views
For chemistry, I have to make a line graph. My teacher specifically instructed us to make one with smooth, fluid lines, not with
1. 1 answer
2. asked by Coralie
3. 590 views
Mrs. Sue, I redid the whole article again and I took your advice could you please check this over. If you need to go back and
1. 1 answer
2. asked by Valentine's Sweetheart
3. 588 views
Hi,I was wondering if anyone could provide me the necessary information to solve this problem. For the following elements: CdSe
1. 1 answer
2. asked by Anonymous
3. 586 views
solve the following two equations algebraically.4x+3y=12 4x-y=4 give the coordinates of intersection.
1. 1 answer
2. asked by tyler smith
3. 585 views
I'm completely lost. After overviewing the political arrangements of Iberian and Anglo-French, explain whether governmental
1. 5 answers
2. asked by Max
3. 576 views
"Solve each system algebraically. Identify each system as cosistent and dependent, cosistent and independant, or inconsistant."m
1. 7 answers
2. asked by Mel
3. 572 views
what is the translation that maps the funtion f(x)= x squared - 1 onto the funtion g(x0= x squared + 1
1. 1 answer
2. asked by latoya
3. 572 views
show that 6+6sin X is equivakent to--------- - 7 cos x 6cos x ------------ -7(1- sin x)
1. 1 answer
2. asked by colleen
3. 566 views
graph the following 2 graphs - y=2x+3 and y=2x-4.a)state the intersections on the y axis and the x axis. b)what is the vertical
1. 2 answers
2. asked by caitlyn maroon
3. 559 views
Which expression represents the pharse "ten less than the product of 5 and the sum of a number and 3"?a. 10-5x+2 b. 5(x+20)-10
1. 3 answers
2. asked by Anonymous
3. 547 views
If sigma(t)^2 denotes the standard deviation in the quantity t^2, show thatsigma(t)^2=2tsigma(t) I don't even know where to
1. 1 answer
2. asked by Anna
3. 546 views
Adding Rational Expressionsm/p^2 + 3/p^3 - 4
1. 1 answer
2. asked by jaz
3. 541 views
solve the linear system using substitution. please show me the steps!:)x-y=-5 2x-y=-7
1. 1 answer
2. asked by saira
3. 537 views
You're likely to encounter formal service in all of the following settings except which one?
1. 3 answers
2. asked by Anonymous
3. 535 views
A 9v circuit charges a capacitor to steady state. Then the switch is opened.All resistance units in kilo-ohms: 2 rsistors, 20
1. 3 answers
2. asked by charlie
3. 534 views
research the salt lake city olympics scandal and address specific issues that link to bigtowns situation
1. 2 answers
2. asked by christi
3. 534 views
Considering matterand energy together the smallest component of the universe seems to be
1. 1 answer
2. asked by Siedah
3. 531 views
Adding Rational Expressions9/xy^3+m - 7ap/xy^3m= x/3+c/y+4/z=
1. 3 answers
2. asked by will
3. 531 views
Which pair of points lie on a line with an undefined slope?a. (0,4) (4,0) b. (0,2) (2,2) c. (4,0) (4,4) d. (4,4) (2,2)
1. 1 answer
2. asked by Anonymous
3. 529 views
Hi,I was wondering if anyone could provide me the necessary information to solve this problem. For the following elements: CdSe
1. 0 answers
2. asked by Anonymous
3. 520 views

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