Belinda

Most popular questions and responses by Belinda
  1. Chemistry - solubility

    Arrange the following compounds in order of increasing solubility in water: * O2 * LiCl * Br2 * CH3OH Like dissolves like; that is, polar compounds usually are soluble in water and non-polar compounds are not soluble in water. From that description, make

    asked on January 2, 2007
  2. AP Chem

    When NH3 gas is introduced at one end of a long tube while HCl gas is introduced simultaneously at the other end, a ring of white ammonium chloride is observed to form in the tube after a few minutes. This ring is closer to the HCl end of the tube than the

    asked on January 23, 2007
  3. Physics-Help please...

    The graph give the acceleration a versus time t for a particle moving along an x axis. The a axis scale set by a=12 m/s^2. At t = -2s the particle's velocity is 10 m/s. What is its velocity at t = 6s. I know that I am supposed to used integrals to solve,

    asked on October 1, 2011
  4. math

    Suppose you are going to roll a die 60 times and record the proportion of times that a 1 or 2 is showing, s. The sampling distribution of s should be centered about....?

    asked on February 5, 2008
  5. Chemistry - Van't Hoff Factor

    How does the van't hoff factor relate to freezing points? If one van't hoff factor is bigger than another, is its freezing point lower or greater? delta Tf = iKfm. So increasing i will increase delta Tf Van't Hoff factor is the concentration of particles

    asked on January 5, 2007
  6. physics

    A worker in a warehouse uses a rope passing through some pulleys to lift a heavy crate. The worker exerts a force five times less than the weight of the crate but has to move the rope four times as far as the crate moves. This situation... A) can happen

    asked on July 5, 2014
  7. English

    Speech. Help me with this speech which reads english is a language of opportunity why bother teaching indigenous languages.

    asked on July 17, 2019
  8. math

    In a large population of adults, the mean IQ is 112 with a standard deviation of 20. Suppose 200 adults are randomly selected for a market research campaign. The probability that the sample mean IQ is greater than 110 is...?

    asked on February 5, 2008
  9. Chemistry College

    If KHP sample 1 requires 22.47 mL of aqueous NaOH, how many milliliters of NaOH should be needed for samples 2 and 3?

    asked on April 18, 2013
  10. New AP Chem Question for Dr. Bob

    This is a Hess' Law problem. I think I got it but I'm hoping you could check it for me: Calculate the heat of reaction for changing 1 mol of silica, SiO2, that has been extracted from sand into the pure silicon that is needed to make computer chips. Use

    asked on January 23, 2007
  11. health

    Much research is being conducted on repairing faulty sensory organs through devices such as personal guidance systems and eyeglasses, among others. Do you think that researchers should attempt to improve normal sensory capabilities beyond their

    asked on November 13, 2014
  12. Math

    If on a scale drawing 100 feet are represented by 15 inches, then a scale of 1/2 inch represents how many feet?)

    asked on January 12, 2019
  13. Statistics

    If the mean of a set of data is 20.00 and 12.20 has a z-score of -1.30, then the standard deviation must be: What formula would you use to determine this?

    asked on April 7, 2011
  14. u s history

    what factors led to western expansion at the the? what other factors contributed to the expansion? how has the notion of Manfiest Destiny shaped the world today?

    asked on March 7, 2011
  15. Statistics

    One of my classmates ask this question and it wasn't answered so now I am asking it and of course we are all struggling with no strong Math background Case 6.4 Maternal Serum Screening Test for Down syndrome Please keep in mind that I do not have a Math

    asked on February 7, 2011
  16. Pre-Calc

    Does y=1/x have an inverse? It is a one-to-one function, so it should be the inverse equation is the same??? yes, the inverse is the same. Check it with G(f(x)) So, when drawing the inverse, it is just the same graph?

    asked on January 21, 2007
  17. AP Chem - to Dr. Bob

    I don't understand how to even start this problem: A mixture of H2(g), O2(g), and 2 mL of H2O is present in a 0.5 L rigid container at 25 degrees Celsius. The number of moles of H2 and the number of moles of O2 are equal. The total pressure is 1146 mmHg.

    asked on January 23, 2007
  18. Physics

    If a 1.00 kg body has an acceleration of 3.69 m/s2 at 75° to the positive direction of the x axis, then what are (a) the x component and (b) the y component of the net force on it, and (c) what is the net force in unit-vector notation? If f = ma can f =

    asked on October 22, 2011
  19. calculus

    If an equation of motion of a particle is given by s(t)= Acos(ùt + ä), the particle is said to undergo simple harmonic motion. Find the velocity of the particle at time t. When is the velocity 0?

    asked on September 27, 2011
  20. AP US History DBQ Question

    For my midterm I was given a list of DBQ topics that she will pick from to give to us. I wrote the question below and I don't have the documents yet, but I have a general outline and I'm hoping people on this site can give me opinions and some more

    asked on January 24, 2007
  21. computer

    I need to do the degrees celcuis and fahrenheit abreviations on my computer document, can someone tell me what keys to use. oC & oF. Do you want to post them on this board or is this a document you are writing. If the latter, what program are you using. If

    asked on January 11, 2007
  22. Statistics

    the average numbers of hours a cat sleep is approximately normally distributed with a mean of 15 hours and a standard deviation of 1.7 hours; what percentage of cats sleep between 13 and 18 hours

    asked on April 27, 2014
  23. financial analysis

    A zero coupon bond with a par value of 1,000 has 15 years to maturity. If the YTM is 6.2% what is the current price of this bond?

    asked on April 18, 2014
  24. Business

    The free shipping and manufacturer’s warranty that comes with a coffee maker represent which category of purchase criteria among the Four Utilities of Customer Value? Form Ease of possession Time Place

    asked on April 7, 2014
  25. Cubic Equations

    I have three that I need help with if possible. 1. Solve 2x^3 - 3x^2 = 6x - 9 2. Find all real and imaginary roots of the polynomial equation 3x^4 - x^3 + 4x^2 - 2x - 4=0 3. Find a cubic equation with integral coefficients and roots 3i and -5.

    asked on January 8, 2012
  26. Child safety- car seat question

    To function properly,children's safety seats and restraints must: 1. be installed correctly and anchored to the vehicle. 2. face the back of the seat. 3. come with a lap belt and shoulder harness. Would number 1 be the best answer? My text says: "Safety

    asked on April 17, 2007
  27. AP US History

    Is a DBQ supposed to be a generic 5-paragraph essay or is it a certain length??? A DBQ is a question based upon facts presented in a document. For most purposes, it can be any length. But the generic 5-paragraph essay is a standard. Check this site for

    asked on January 24, 2007
  28. AP Chem - to Dr. Bob

    I don't understand how to even start this problem: A mixture of H2(g), O2(g), and 2 mL of H2O is present in a 0.5 L rigid container at 25 degrees Celsius. The number of moles of H2 and the number of moles of O2 are equal. The total pressure is 1146 mmHg.

    asked on January 23, 2007
  29. AP Chem

    What is the STP for temperature? Is it 25 degrees Celsius? DO you go to Gateway High? me? no. why? STP is 1 atmosphere for pressure and 0 Kelvin (273o C).

    asked on January 23, 2007
  30. Math

    Steps of calculations that show the simple interest on a R5000 loan for 3 years at 9 percent interest

    asked on February 21, 2016
  31. English 125 Introduction to literature

    What does the term literature mean to you? What makes something literary in your own mind? If literature means different things to different people, who defines what is and what is not literature? 2.What kind of reading engages/interests you? What about

    asked on June 6, 2012
  32. chemistry

    what is the molality of a 0.068M solution of ethyl alcohol in water at 25 degrees celsius. (assume the density of the solution at such a low concentration is equal to that of water at 25degrees celsius, 0.997g/ml)

    asked on February 2, 2011
  33. chemistry

    what is the molality of a 0.068M solution of ethyl alcohol in water at 25 degrees celsius. (assume the density of the solution at such a low concentration is equal to that of water at 25degrees celsius, 0.997g/ml)

    asked on February 2, 2011
  34. English

    Write an essay on university education in a paragraph.

    asked on October 31, 2010
  35. The Digestive System

    Trace the path of food from ingestion to defecation and describe what happen at each stop? Also name enzymes.

    asked on December 9, 2009
  36. Chemistry

    Zinc coats Iron and prevents it from rusting. However Iron cannot be used to coat zinc and prevent it from corroding.Explain this phenomenon.HELP PLEASE URGENT!!

    asked on October 24, 2009
  37. calculus

    what is the integral of (x^2-x+6)/(x^3-3x)? the process involves partial fractions, and the answer is supposed to include ln and arctan... i just don't know how to get there.

    asked on March 2, 2008
  38. US History

    How did the Kansas-Nebraska Act indirectly wreck the Compromise of 1850? This site will explain that conflict. http://www.infoplease.com/ce6/history/A0827030.html

    asked on January 2, 2007
  39. US History

    Is anyone on here in AP US History? Ask your question, state your thinking on it. Yes is the answer to your question. What were the Lincoln-Douglass debates? Check this site for information bout these debates. http://www.nps.gov/archive/liho/debates.htm

    asked on January 2, 2007
  40. 6th

    Is (a) a linking verb? :)

    asked on June 21, 2017
  41. math

    number sense does the expression d-12 have a greater value when d=42 or when d=46

    asked on September 26, 2012
  42. computers

    can you please help me with compare and contrast Lans, Wans, Cans,Mans, Hans

    asked on May 2, 2011
  43. Statistics

    For a set of data with mean 12 and variance 9, approsimately 68% of the values will fall between 6 to 18. Is the true or false and how do you find the answere?

    asked on April 7, 2011
  44. math

    whats the integral of e^(3sqrt(x))? i think i'm supposed to use substitution but i don't know what to substirute, i tried u= x^(1/3) but it didn't work out, please help!

    asked on March 1, 2008
  45. Poem Help Needed

    This is a poem by John Berryman that I am supposed to analyze and I am completely confused by. If anyone has any observations or ideas about the main idea of the poem, PLEASE help me out! "The Traveller" They pointed me out on the highway, and they said

    asked on April 8, 2007
  46. AP US History

    Was the War of 1812 defensive or aggressive on America's part? I feel like it was aggressive because we attacked first, but maybe it was defensive because we were defending ourselves against impressment. Someone please clarify this for me, thanks. You're

    asked on January 25, 2007
  47. AP Chem

    When a gas filled balloon is cooled, it shrinks in volume; this occurs no matter what gas is originally placed in the balloon. Why? I was thinking maybe because the number of collisions are less and so the slower moving particles aren't hitting the walls

    asked on January 23, 2007
  48. Discipline

    Carl is getting tired of two children in his three-year-old room having wetting accidents on the playground. The class always uses the restroom before they go outside,but two of the boys are wetting themselves at least once a week,making Carl have to send

    asked on January 16, 2007
  49. Discipline

    I have a couple of questions that I need some help with. 1.Miss Wiggs is trying to read a story about elephants before her first grade class leaves that morning for a trip to the local zoo.The children have already sat through calendar and weather time,as

    asked on January 16, 2007
  50. Discipline

    Kyle, a two-and-a-half- year old, is stacking blocks in the block center. Karen is playing beside him with some large cars. As their teacher Melanie watches, Karen rolls her car into Kyle's tower causing it to fall. Kyle hits Karen causing her to cry.

    asked on January 16, 2007
  51. English

    In Nathaniel Hawthorne's "Dr. Heidegger's Experiment", I was asked to figure out how Hawthorne feels about transcendentalism. We determined that Dr. Heidegger represents Ralph Waldo Emerson, a transcendentalist. However, I can't decide if Hawthorne thought

    asked on January 4, 2007
  52. William Lloyd Garrison

    How was William Lloyd Garrison a "pacifist" and also burned the Constitution, etc.? He seems pretty violent and liberal, not pacifistic, but the textbook calls him one. http://en.wikipedia.org/wiki/William_Lloyd_Garrison

    asked on January 1, 2007
  53. accounting

    Cartwright inc has $1,000,000 of 10% bonds outstanding on December 31, 20x8. On January 1, 20x9 adams corp and 80% owned subsidiary of Cartright, inc purchases a $250,000 part of cartwrights inc's outstanding bonds in the market for $245,000. Interest

    asked on April 21, 2014
  54. English

    What is the importance of feedback in communication?Explain.

    asked on November 3, 2010
  55. astronomy

    Why is the sky blue?

    asked on January 21, 2008
  56. math

    -12-(-17)/ -23-(-23)

    asked on September 8, 2007
  57. Chemistry - Rate Law

    The following example is given in my textbook: If a chemical equation is: NO2 (g) + CO (g) -> NO (g) + CO2 (g) The rate law is: Rate = k[NO2]^2 Usually you put in the reactants in their own sets of brackets, so why isn't the reactant CO involved in the

    asked on January 31, 2007
  58. Math , correction

    correct Write the equation of the line passing through each of the given pairs of points. Write your result in slope-intercept form, where possible. (2,-3) and (2,4) this is what i did for it. m= (4-(-3))/(2-2)=(7)/(0)= slope is undefined which means that

    asked on January 24, 2007
  59. calculation

    how do I figure out the calculation of 999, 822 and the date of 5/14/2015 to equal 51981220?

    asked on September 23, 2015
  60. Statistics

    What percentage of cats sleep less than 10 hours? What percentage sleep more than 20 hours

    asked on April 27, 2014
  61. math

    number sense does the expression d-12 have a greater value when d=42 or when d=46

    asked on September 26, 2012
  62. Physics - acceleration..need to find velocity

    I am given two points on an acceleration vs time graph: (-2,13),(4,0). When t = -2s, v = 10 m\s. What velocity at t = 6s? I believe acceleration average is (-13/6), but how do I solve the rest get the correct answer, which is 44.7 m/s? Any help or hints

    asked on October 21, 2011
  63. Physics

    I am given two points on an acceleration vs time graph: (-2,13),(4,0). When t = -2s, v = 10 m\s. What velocity at t = 6s? I believe acceleration average is (-13/6), but how do I solve the rest get the correct answer, which is 44.7 m/s? Any help or hints

    asked on October 20, 2011
  64. algebra

    Here is my question. How do you solve th substitution method in this problem? 9x - y = 40 y = 4x

    asked on September 11, 2011
  65. history of design

    discuss the whatham paper project

    asked on April 11, 2011
  66. math

    factor 3m^2n + 2m

    asked on March 3, 2010
  67. mth

    (2)^-2 ?

    asked on February 24, 2010
  68. Ethics

    What forms of testing do sociologist utilize to measure prejudice?

    asked on March 28, 2008
  69. calculus

    what is the integral of x^2-x+6/x^3-3x? the process involves partial fractions, and the answer is supposed to include ln and arctan... i just don't know how to get there.

    asked on March 1, 2008
  70. US History

    Why did the National Labor Union collapse? Please don't give me links - I've looked everywhere, including Wikipedia. I just don't understand what actually caused it to collapse so I'm looking for an answer. I'm trying to connect it to the collapse of the

    asked on February 12, 2007
  71. AP US History

    What was Thomas Jefferson's party called against Hamilton's Federalist party? Check this site for your answer. http://www.pbs.org/wgbh/amex/duel/peopleevents/pande05.html

    asked on January 25, 2007
  72. To Jasmine20 - FOILing

    Try this website to learn about FOILing better: Go to Google and type in "FOIL" Click the first option (it starts with algebra.help........) If you can't find the exact website, just look through Google to find a lesson on FOILing. I think that one should

    asked on January 24, 2007
  1. math

    b= Library t= Textbooks p= Telephone 1) b+p= 2t 2) t+p= 3b 3) b+t+p= 36

    posted on December 9, 2017
  2. Maths

    1.8km

    posted on May 17, 2017
  3. Math

    i dont know

    posted on January 9, 2017
  4. math

    Exact Form 25000e^0.2 answer: $3084

    posted on February 16, 2016
  5. human services

    Can lower the cost

    posted on June 17, 2015
  6. physics

    work done by man: 4h*1/5w=work work done on crate: h*w=work w&h = 1 man = 4*.2 = 0.8 crate = 1*1 = 1 So is it D?

    posted on July 5, 2014
  7. Business

    9. Which of the following trends is causing marketers to place more emphasis on competitive differentiation? (C) A. Investment costs that are accrued during the Introduction phase. B.Increasing speed with which products are brought to market. C.Subsequent

    posted on April 7, 2014
  8. english

    Born in Manila, Salonga began performing at age seven.

    posted on November 28, 2012
  9. math

    2150

    posted on January 27, 2012
  10. Cubic Equations

    Thanks so much :D

    posted on January 8, 2012
  11. medical coding 1

    If you get your answers off of this site or others like this double check your work. Just because they are on here does not always make them correct. I wanted to do a little reasearch on an assignment I had and came across this site I started double

    posted on January 20, 2011
  12. English

    should i talk about the relevance

    posted on October 31, 2010
  13. Research Project on Computer Confidentiality

    I am working on the same project and I know your frustrations. I have been to the libraries in two diffrent counties and two college book stores along with Barnes and Nobles with no luck on any refrence guides. I took the advice from the person abouve and

    posted on August 4, 2010
  14. Reseach paper

    I too am doing the same paper through Penn Foster. I found the information on the ama web site just dosen't seem to be enough information to make a long enough paragraph and I can not find any help at my local libraries or online. I found a good book but

    posted on August 3, 2010
  15. mth

    you must have been reading my problem wrong though...? I'm saying 2 to the -2 power

    posted on February 24, 2010
  16. mth

    already tried that. google calc. isn't always necessarily correct...but thanks for the attempt!

    posted on February 24, 2010
  17. Chemistry

    But then copper and tin can also be used to plate iron even if they're less reactive than iron.

    posted on October 24, 2009
  18. Chemistry

    The water would change to ice. This is because bond breaking energy is higher than bond making energy hence more heat would escape from the water. Therefore temperature would drop and water would change to ice and consequently increase in volume.

    posted on October 24, 2009
  19. Chemistry

    what is H2C2O4

    posted on February 22, 2009
  20. math

    so my final answer would be 1/3 right? it seems too simple to be true...

    posted on February 5, 2008