Dora

Most popular questions and responses by Dora
  1. Chemistry

    The elements X and Y form a compound that is 40% X and 60%Y by mass. The atomic mass of X is twice that of Y. What is the empirical formula of the compound?

    asked on March 7, 2018
  2. O-Chem

    A student wished to prepare ethylene gas by dehydration of ethanol at 140 C using sulfuric acid as the dehydrating agent. A low-boiling liquid was obtained instead of ethylene. What was the liquid, and how might the reaction conditions be changed to give

    asked on January 14, 2009
  3. English

    You are a speaker in a school's debate on the topic "boys should not help in the kitchen" write your speech for or against the motion

    asked on March 13, 2018
  4. statistics

    In 2006, 75.9% of first-year students said they used the Internet for research or homework. Administrators found that 168 of an SRS of 200 first-year students used the Internet for research or homework. Is the proportion of first-year students who used the

    asked on October 9, 2013
  5. English

    Can you help me unscramble these words; dramalanse,ubrocai,planotee,evebra, chorits. they are animal names.Please help!!! thanks Try these: http://www.ssynth.co.uk/~gay/anagram.html http://wordsmith.org/anagram/ http://www.unscramble.net =) unscramble to

    asked on April 23, 2007
  6. Organic Chemistry- help Dr. Bob

    1. What is the maximum volume (at STP) of the butene mixture that could be obtained by the dehydration of 81 mg of 2-butanol? 2. When 2-methylpropene is bubbled into dilute sulfuric acid at room temperature, it appears to dissolve. What new substance has

    asked on January 7, 2009
  7. physics- pls help me

    1. The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration -5.20 m/s2 for 4.45 s, making straight skid marks 62.5 m long ending at the tree. With what speed does the car then strike the tree?

    asked on October 7, 2009
  8. O chemistry

    1. Predict the relative rates for the reaction of butadiene and a. ethene, b. methyl propenoate, c. and maleic acid 2. what product is expected from the reaction of fumaric acid (trans-2-butenedioic acid) with 1,3-butadiene.

    asked on March 3, 2009
  9. Intermediate Algebra

    If a 9-foot tall adult elephant casts an 18-foot shadow, how long is the shadow of the 6-foot zookeeper? Use a proportion to set up and solve an equation. Round your answer to the nearest tenth of a foot if necessary.

    asked on July 12, 2015
  10. Statistics

    A math professor notices that scores from a recent exam are normally distributed with a mean of 64 and a standard deviation of 5. Answer the following questions using integer values. The professor decides to grade on a curve. If he wants 0.15% of the

    asked on February 14, 2012
  11. statistics

    A math professor notices that scores from a recent exam are normally distributed with a mean of 64 and a standard deviation of 5. Answer the following questions using integer values. What score do 75% of the students exam scores fall below? And, how was

    asked on February 14, 2012
  12. physics

    Search: A block of steel (7900 kg/m3) is suspended from a spring scale. The scale is in newtons.What is the scale reading if the block is in air?What is the scale reading after the block has been lowered into a beaker of oil (900 kg/m3) and is completely

    asked on December 17, 2010
  13. govt

    what do they mean by highly specialized committee structure

    asked on October 20, 2012
  14. Organic Chemistry

    2. Why doesn’t the neutral organic compound (Flourene) dissolve in 1.5 M sodium hydroxide solution?

    asked on November 4, 2008
  15. Physical Science

    What is the advantage of using the Celsius scale over the Fahrenheit scale? The Celsius scale, being metric, makes more sense than using the Fahrenheit scale. Check this site for more information. http://en.wikipedia.org/wiki/Moral_hazard

    asked on June 22, 2007
  16. finance

    The Blinkelman Corporation has just announced that it plans to introduce a new solar panel that will greatly reduce the cost of solar energy. As a result, analys now expect the company’s earnings, currently (year 0) $1 per share to grow by 50 percent per

    asked on September 10, 2011
  17. Finance

    Zabberer Corporation bonds pay a coupon rate of interest of 12 percent annually and have a maturity value of $1000. The bonds are scheduled to mature at the end of 14 years. The company has the option to call the bonds in 8 years at the premium of 12

    asked on September 10, 2011
  18. O CHEM - dr. bob

    1. What is the maximum volume (at STP) of the butene mixture that could be obtained by the dehydration of 81 mg of 2-butanol? 2. When 2-methylpropene is bubbled into dilute sulfuric acid at room temperature, it appears to dissolve. What new substance has

    asked on January 7, 2009
  19. O Chem

    1. What is the maximum volume (at STP) of the butene mixture that could be obtained by the dehydration of 81 mg of 2-butanol? 2. When 2-methylpropene is bubbled into dilute sulfuric acid at room temperature, it appears to dissolve. What new substance has

    asked on January 5, 2009
  20. Organic Chemistry

    1. Why is diethyl ether a good choice for an organic solvent? 2. Why doesn’t the neutral organic compound dissolve in 1.5 M sodium hydroxide solution?

    asked on November 4, 2008
  21. physcial science

    As water freezes, its temperature does what? a) increase b) decrease c) first increase, then decrease d) does not change The temperature of freezing water is 0o C. The temperature of the water will remain at zero C until all of the water has frozen;

    asked on June 22, 2007
  22. american government

    Consider the following features of Congress (including some that no longer apply), and discuss the policy implications of each. Does they (a) lead to more or less logical and coherent policies? (b) lead to more or less representation of various local and

    asked on October 19, 2012
  23. Math

    What is the total price of $3.25,$1.10 including 7% tax

    asked on February 3, 2010
  24. maths

    Graham is serving pizzaat a party. Each person is given 3/4 of a pizza. Graham has 6 pizzas. How many people can he serve?

    asked on January 23, 2018
  25. critical thinking

    How are the problems in crime, housing and health interrelated?

    asked on April 9, 2015
  26. maths

    The 8th term of a Gp is ~7/32 find its common ratio if Its first term is 28

    asked on January 22, 2019
  27. chemistry

    what the balance equation for solid carbon

    asked on February 14, 2014
  28. Law

    where can I find information on Issues in Supervision and Consultation?

    asked on March 25, 2013
  29. Finance

    Sports Novelties, Inc., has experienced an explosion in demand for its feathered football novelties. The firm currently (time 0) pays a dividend of $0.25 per share. This dividend is expected to increase to $0.75 per share 1 year from now. It is expected to

    asked on September 10, 2011
  30. Algebra

    In a triangle ABC, angle B is three times angle A and angle C is 5 degrees less than 6 times angle A. Find the size of the angles.

    asked on March 10, 2010
  31. calculus

    evaluate the following integrals by any means possible: b. integral from -1 to 1 (w/ (w^2+1)) (dw) c. integral from -3 to 0 sqrt(9-x^2)dx

    asked on July 3, 2009
  32. trigo

    calculate the amount of each annuity of the last deposit.A deposit of $450 at the end of each month period of 5 years at 6.5% compounded semi annually.If you don't have my email how i am going to recerive the answer?

    asked on June 9, 2009
  33. gen

    do you think this is nonagist our new district attorney is making a speech on saturday.

    asked on April 8, 2009
  34. entrepreneurship

    You just received an email from your high school friend, Bill Hudson. You went to college, and then business school, while Bill stayed in your home town. Despite the differences in your paths, you are still very good friends. Bill is considering a

    asked on August 28, 2008
  35. Chemistry -- to Dr.Bob

    I had posted a while back and still couldn't solve this is there anyway you could show me the steps on how u did this? thank you very much A solution is made by mixing 20.0 mL of toluene C6H5CH3d=0.867gmL with 150.0 mL of benzene C6H6d=0.874gmL. Assuming

    asked on April 5, 2008
  36. chemistry

    A solution is made by mixing 20.0 mL of toluene C6H5CH3d=0.867gmL with 150.0 mL of benzene C6H6d=0.874gmL. Assuming that the volumes add upon mixing, what are the molarity (M) and molality (m) of the toluene

    asked on April 3, 2008
  37. Math

    An exercise book costs $0.9 and a pencil cost $0.6. What is the total cost of buying: 2 exercise books and y pencils in terms of Y?

    asked on November 25, 2016
  38. government

    why should federal courts be able to declare an act of Congress unconstitutional

    asked on October 21, 2012
  39. government

    There is much debate in our country about activist judges and strict constructionist judges. Do you believe that judges should be limited to interpreting what the constitution and federal laws say?

    asked on October 21, 2012
  40. Math; Pre -algebra

    How many 3 letter arrangements can you make while making the first and the third letter one of the 21 constants and the middle letter one of the 5 vowels {a,e,i,o,u} . {two such arrangments to use are KOM and XAX?

    asked on May 3, 2010
  41. algebra

    -72 / (-92) rewrite the division as a multiplication

    asked on March 11, 2010
  42. algebra

    -x/5 = 1/16 solve using the multiplication principle

    asked on March 11, 2010
  43. math

    By selling a piece of land for $700 a man made a loss of 20%.How much did he buy the land

    asked on October 2, 2009
  44. Calc

    Find dy/dx by implicit differentiation and simplify the result 1. x=sec(1/y) 2. 4xy+ln(x^2y)=7 Hello I sort of know how to do these problems but not really. :( Can someone show all the work to solving them it would help me greatly. Thank you a lot.

    asked on June 14, 2017
  45. chemistry

    write down the chemical formular for the following compounds 1.Sodium flouride 2.Berillium chloride 3.Pottasium iodide 4.Rubidium bromide 5.Magnesium sulphide

    asked on September 27, 2016
  46. Science

    The following questions concern the iconic Nestle Toll House Chocolate Chip Cookie recipe, shown below: 2 1/4 cups all-purpose flour 1 teaspoon baking soda 1 teaspoon salt 1 cup butter or margarine, softened 3/4 cup granulated sugar 3/4 cup packed brown

    asked on August 1, 2015
  47. social, political,

    As a policy maker, how can sustainability be achieved

    asked on July 1, 2013
  48. math

    I am having difficulty with statistics..I am taking stats 4, but haven't taken 3 yet. Explain deviation below or above the means please. ex. If bill received a NCE score deviation below the mean, what would his score be? which is 10. Can you explain the

    asked on November 25, 2012
  49. american gov't

    What are some positive consequences of having interest groups? Negative?

    asked on November 5, 2012
  50. politics

    There are various levels and types of judicial courts. In the case Sitz v. Michigan Department of Police, two levels of government and court systems interact to come to a final verdict. What was the final verdict and how did it reach that conclusion?

    asked on October 21, 2012
  51. just a question

    Can efforts to reinvent government solve the problems associated with bureaucracies? Why or why not?

    asked on October 21, 2012
  52. government

    In gov't what does ommittee reforms that have taken power away from chairs represent?

    asked on October 20, 2012
  53. AP (Honors) World History

    I need a good thesis statement for my continuity and change over time informative essay on Hinduism, but I don't know how to even start. Please help.

    asked on February 14, 2012
  54. algebra

    150/-15 divide if possible

    asked on March 11, 2010
  55. Algebra

    what is the equivalent expression of 94 + xy

    asked on March 10, 2010
  56. psychology

    hi can you please help me with the following 1) performance goals 2) mastery goals 3) the effect of praise 4) Expectations and self-efficacy i need the websites where i can get information from. please help me thanks

    asked on November 24, 2009
  57. Chemistry

    What is the empirical formula of the oxide in Magnesium Oxide? The number of moles of Mg = 8.026 x 10^-8. The number of moles of O = 1.605 x 10^-7.

    asked on October 22, 2009
  58. Organic Chemistry

    Some biphenyl ( C6H5----C6C5) is produced as a by-product in the synthesis of benzoic acid . Where does this come from?

    asked on March 8, 2009
  59. ochem

    Why is that that a third order alkyl halide reacts faster in SN1 mechanism? Why is it the opposite for SN2? (is it just steric hindrance? )

    asked on November 24, 2008
  60. Law

    Where can I find info on Professional Competence and Training in counseling?

    asked on March 7, 2013
  61. government

    Why would bureaucrats become more concerned that elaborate procedures are followed, as opposed to achieving certain substantive outcomes? What political relationships cause this result?

    asked on October 21, 2012
  62. Math

    My worksheet title reads "Modeling 3-Digit Addition Practice" and then it has the problem 186+245 and then it has a table with four colummns and 3 rows the first column title reads "Base-Ten Drawings" the second one reads "Record the Problem" and the third

    asked on October 18, 2010
  63. Algebra

    Collect like terms 18r^2 + 7s + 4r^2

    asked on March 10, 2010
  64. trigo

    calculate the amount of each annuity of the last deposit.A deposit of $450 at the end of each month period of 5 years at 6.5% compounded semi annually.

    asked on June 9, 2009
  65. English

    In Romeo and Juliet, How does Capulet feel about young marriages?

    asked on April 17, 2009
  66. social studies

    is arizona closer to the equator or to north pole? What is the latitude? If it is greater than 45 degrees N, it is closer to the NPole. http://www.netstate.com/states/geography/az_geography.htm Yes it is.

    asked on August 16, 2006
  1. Walk to moons

    If you guys are saying the stuff is wrong than do it yourself? =-=

    posted on May 21, 2019
  2. LA

    1.C 2.C 3.B

    posted on May 21, 2019
  3. Math(PLZ HELP)

    Do you kids know the meaning of hate? If you don't you shouldn't use it! That's just rude, Why would you tell someone you hate them? And don't call people stupid or stoopid or bozo's that's just really mean. Everyone needs to be nice to each other! And

    posted on April 10, 2019
  4. Social Studies

    It is B,A,A,C good job Anonymous! x

    posted on April 4, 2019
  5. Language arts

    WELP KIDS I FOUND OUT WHATS WRONG XD Everybody has different questions on different ones

    posted on March 21, 2019
  6. Language arts

    Actually.. Kids you're all wrong! 1. C 2. C 3. A 4. D 5. B 6. C 7. D 8. B 9. C 10 = Essay 11. C 12. C 13. B 14. B 15. B 16. A 17. D 18. B 19. B 20. C 21. D 22. D 23. D 24. B 25. B 26. A 27. A I hope these help all of you! When we tried the ones that one

    posted on March 21, 2019
  7. accounting

    6.7

    posted on August 23, 2016
  8. Math please help

    Over the course of 6 days. Rachel walked 5.75 miles ,6 miles, 4.74 miles , 3.5 miles , 5 miles ,and 7 miles. What was the average distance she traveled each day?

    posted on April 28, 2016
  9. Math

    How can you write a variable expression for the area of the walkway

    posted on September 2, 2015
  10. Chemistry

    The following questions concern the iconic Nestle Toll House Chocolate Chip Cookie recipe, shown below: 2 1/4 cups all-purpose flour 1 teaspoon baking soda 1 teaspoon salt 1 cup butter or margarine, softened 3/4 cup granulated sugar 3/4 cup packed brown

    posted on August 1, 2015
  11. math

    455f52

    posted on September 11, 2014
  12. american government

    ok thank you

    posted on October 19, 2012
  13. american government

    I don't understand what they are asking

    posted on October 19, 2012
  14. Statistics

    It shows there has been a response to my question but I don't see one that in my opinion addresses my question.

    posted on February 14, 2012
  15. Math

    3,because if you divid 6 and 18 it gives you 3

    posted on November 16, 2011
  16. social studies

    the nile river flows into what body of water

    posted on January 9, 2010
  17. Romeo and Juliet Help Quick Question

    He gives her a potion, we know this because he has a specialty in herbs and plants and in his previous soliloquy he tells us he knows what plants can stop the heart and such. Also, in act 5 - scene 3 line 244 he says he gave her a sleeping potion. :)

    posted on April 17, 2009
  18. 9th grade

    You distribute the first set of brackets. When you have equations like this you should pretend there are no brackets around the first equation. b-6 (b+3) first you distribute b into the brackets. (b)(b) = b^2 then b to 3 (b)(3) = 3b then you distribute the

    posted on April 17, 2009
  19. Organic Chemistry- help Dr. Bob

    alright thank you so much for your help!

    posted on January 8, 2009
  20. Chemistry -- to Dr.Bob

    thank you very much Dr. Bob

    posted on April 5, 2008
  21. chemistry

    i still got it wrong 0.867 g/mol= x/ 20 ml x= 17.94 g 0.874 g/mol= x/ 150 mil x= 131.1 g toluene 17.904 g x 1 m/ 92.14 g/ mol= .194 m benzee 131.1 g x 1m/78.1121 g/mol = 1.68 m .194 m Toluene/ .1311 kg = 1.48

    posted on April 3, 2008