deedee

Most popular questions and responses by deedee
  1. chemistry

    Use standard enthalpies of formation to calculate ΔHrxn° for each reaction. (See the appendix. Enter your answer to the tenth place.) (a) 2 H2S(g) + 3 O2(g) 2 H2O(l) + 2 SO2(g) (b) N2O4(g) + 4 H2(g) N2(g) + 4 H2O(g) (c) SO2(g) + 1/2 O2(g) SO3(g) These

    asked on November 17, 2012
  2. Chemistry

    Calculate the [H3O+] and pH of each polyprotic acid solution. (b) 0.116 M H3C6H5O7 I did part (a) just fine, but for some reason can't figure (b) out. Can someone help me with just the [H3O+] part to get me started? I already got 9.3e-3 and 1.4e-3 without

    asked on April 6, 2013
  3. chemistry

    NH4NO3(s) NH4+(aq) + NO3−(aq) In order to measure the enthalpy change for this reaction above, 1.07 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8°C and the final temperature (after the solid

    asked on November 16, 2012
  4. Analytical Chemistry

    Could someone show me step by step how to solve this type of problem? I have to do several of them, and would love to understand what is actually happening! Thank you so much in advance, I appreciate your help and time! Calculate the weight percent of

    asked on June 5, 2016
  5. Sign Language

    When you are signing a comparative adjective, do you add the sign for the suffix “-ER” after or before the descriptive word is signed?

    asked on February 21, 2018
  6. CHEMISTRY

    According to the equation H2SO4+2NH3 @(NH4)2SO4. What mass of ammonium sulfate will result from the reaction of 5.00 g of NH3?

    asked on June 19, 2013
  7. Stats

    The area between the mean and a Z score of +1.50 is 43.32%. This score is higher than ___ of the score in the distribution.

    asked on February 1, 2013
  8. statistics

    A and B are events defined on a sample space, with the following probabilities. Find P(A and B). (Give your answer correct to two decimal places.) P(A) = 0.5 and P(B | A) = 0.4

    asked on May 26, 2013
  9. objects of value

    What is a good way to get an idea of how much money certain old items could be worth?

    asked on November 27, 2018
  10. business math

    carol miller went to europe and forgot to pay her $740 mortgage payment on her new hampshire house. for her 59 days overdue on her payment, the bank charged her a penalty of $15 (assume 360 days) what was the rate of interest charged by the bank?

    asked on April 14, 2011
  11. eth 125

    Throughout most of U.S.history in most locations, what race has been the majority? What is the common background of most members of this group?

    asked on March 14, 2012
  12. public speeking

    What might be some modern examples of speech styles that weren't discussed in the lecture? Defend why you consider these to be modern styles. In the lecture-new channels of speaking that have developed as a result of changes in technology. New forms of

    asked on April 27, 2011
  13. statistics

    These data were generated using the equation y = 2x + 1. A scatter diagram of the data results in five points that fall perfectly on a straight line. x 0 1 2 3 4 y 1 3 5 7 9 (a) Find the correlation coefficient.

    asked on May 26, 2013
  14. Health administration

    Health systems can be formed through which of the following mechanisms Ownership Not-for-profits For-profits Mergers

    asked on July 12, 2011
  15. math

    The table lists data regarding the average salaries of several professional athletes in the years 1991 and 2001. year average salary 1991 $263,000 2001 $1,430,000 a)Use the data points to find a linear function that fits the data. b) Use the function to

    asked on December 4, 2008
  16. math

    A and B are events defined on a sample space, with the given probabilities. Find P(A and B). (Give your answer correct to two decimal places.) P(A | B) = 0.43 and P(B) = 0.75

    asked on May 28, 2013
  17. Chemistry

    My Chem professor is out for the weekend and I'm confused about what the question is asking or the equations needed... A 10.0-g block of pure nickel (Cp = 0.445 J/g-°C) is brought to each of the temperatures below. A sealed beaker containing 15.0 g water

    asked on January 26, 2013
  18. physics

    A bomber flies horizontally with a speed of 235 m/s relative to the ground. The altitude of the bomber is 3570 m and the terrain is level. Neglect the effects of air resistance. The acceleration of gravity is 9.8 m/s2 . a) How far from the point vertically

    asked on January 11, 2011
  19. math

    2-2 divided by -2=?

    asked on October 13, 2008
  20. Trigonometry

    A triangle has two angles, one 90 degrees, the other (between adjacent and hypotamuse) 26 degrees, and a hypotamuse of 10ft. Find the opposite side's length. Hint: use sine. I think I'm supposed to do 10(sine26), but the answer isn't right. What am I

    asked on September 6, 2013
  21. economics

    I am writing a paper on the technology industry. Can anyone guide me to some good sites to find information on the following: 1.shifts and price elasticity of supply and demand 2.positive and negative externalities 3.wage inequality 4.monetary and fiscal

    asked on October 22, 2008
  22. policial science

    I have to do an interview so can you guys help me out answering these questions? I need atleast 2 person's oppionion 1- do you agree with the Bush Administration policy of spreading Democracy you and the world. 2- Do you how Bush agree w. handling the war

    asked on January 6, 2007
  23. Math

    Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x))

    asked on May 29, 2013
  24. public speaking

    What are some moderen examples of speech styles?

    asked on April 27, 2011
  25. math

    Solve. x+1/3 + x+2/7 =2

    asked on January 24, 2010
  26. math

    is this correct? find the slope (1,6) (-6,-5) -5-6 -6-1=11/7

    asked on January 6, 2009
  27. Math

    A single die is rolled. (a) What is the probability that the number on top is a 3. (Give your answer correct to two decimal places.) (b) What is the probability that the number on top is an odd number. (Give your answer correct to two decimal places.) (c)

    asked on May 29, 2013
  28. solution

    how much oxygen would be found in 10.0gal of water at 20c

    asked on December 12, 2011
  29. math

    Can someone please check my work? Solve using substitution method 1. 3x+2y=12 x=52-6y answer:-40.8 I am pretty sure that one is wrong. Solve using elimination method 2. 2r-7s=-31 7r+2s=24 answer: (230/53,-468/53) 3.3x+4y=3 6x+8y=6 answer: No answer.

    asked on January 6, 2009
  30. Algebra 1

    11) Tell which real number corresponds to the situation. During a quiz, a person loses 1800 pts. answer: -1800 12) Solve for y z=yq Answer: z-q=y 13) Solve using the multiplication principle 10x=-90 Answer: x= -9 14) Collect like terms 20w+w+14/19w Answer:

    asked on November 5, 2008
  31. Algebra 1

    Can someone please check my answers? Thank You 1) Find an equivalent expression without parenthesis -(y+87) Answer: -y-87 3) Solve -3x-13x=96 answer: x= -6 4) Find the decimal notation 14/25 Answer: .56 5) Divide if possible 7/0 Answer:0 6) Solve 7x+10=52

    asked on November 5, 2008
  32. math

    find -x when x -92/29 wouldn't this be 92/29

    asked on November 5, 2008
  33. math

    find the best buy on cashews a.12oz for $5.39 b.1lb4oz for $7.39 c.10oz for $4.89 d.1lb for $6.39 B)Is this correct

    asked on October 22, 2008
  34. Math

    Could someone check over these for me? Thank you soooooooo much! 1.Maria earns $14/hr. Last week she worked 7 hour days for 4 days. What was her gross pay? $392 2.Arrange the given fractions from smallest to largest. 3/10,1/9,1/12 1/12,3/10,1/9 3.write the

    asked on October 22, 2008
  35. math

    7/9 - (-13/18)=

    asked on October 19, 2008
  36. math

    -3/5 +8/35=? 7/9 -(-13/18)= (4)(-3/2)= -21-(-9)= -21-(-21)=

    asked on October 16, 2008
  37. math

    A salesperson drove 238, 159, 87, 163, and 198 miles (mi) on a 5-day trip. What was the mean number of miles driven per day?

    asked on October 9, 2008
  38. math

    What units in the metric system would you use to measure each of the following quantities? (a) Distance from Los Angeles to New York (b) Your waist measurement (c) Width of a hair (d) Your height

    asked on October 1, 2008
  39. Social Studies

    How would you expect winter temperatures to differ in a coastal city at the same latitude as the interior city?

    asked on September 23, 2008
  40. Social Studies

    How do bodies of water affect temperatures

    asked on September 23, 2008
  41. Finite Math

    A pair of dice is rolled and the resulting sum is odd. The complement of this event would be the sum of that is a multiple of 3? True or false

    asked on June 2, 2018
  42. Calculus I

    Hello! I am not sure why I am getting this problem wrong, and I keep getting six. Could someone be kind enough to show me how it's done? Thank you very much in advance! Find the limit. Use l'Hospital's Rule if appropriate. lim ((5x − 2)/(5x + 4))^(5x +

    asked on June 30, 2014
  43. chemistry 2 college

    explain how to find the mass of solute in the solution: 50.0g of solvent in a 10.0% NaCl solution?

    asked on March 24, 2013
  44. physics

    Under what conditions can you use the formula W=Fnetd to calculate the work done on an object? Describe 2 requirements. What conditions would an applied force increase and decrese the energy of any object.

    asked on February 25, 2012
  45. physical science

    As the number of carbon atoms in the compound increases, what pattern do you see in the boiling points? What general pattern do you see in the melting points?

    asked on March 17, 2011
  46. Healthcare

    What current issues affect positive communication in health care organizations today?

    asked on December 16, 2010
  47. SOCIAL STUDIES

    AFTER THE REVOLUTIONARY WAR,WHAT HAPPENED TO THE COLONISTS

    asked on May 20, 2010
  48. Algebra 1

    17) Simplify [32/-8]/-1/2 Answer: -8 18) Add -7+(-9) Answer: -16 19)Solve 7(3x -2)=28 Answer:x=2 20)Solve using the addition principle 6.4=x-3.7 Answer:x=10.1

    asked on November 5, 2008
  49. Algebra 1

    7) Use cummutative law to find an equivalent expression. 73+yz Answer: 73(y+z) I know this one is wrong but I cannot figure out how to do the problem. 8) Simplify 6[5-9(3-1] Answer: -70 10)The formula b=30a is used in New England to estimate the minimum

    asked on November 5, 2008
  50. math

    a diver dives to 84m. If the diver rises 5 meters per min for 10 min. Where is the diver in relation to the surface. The answer would be 34 meters right?

    asked on October 31, 2008
  51. math

    8gal 7qt minus 5gal 2qt= 6gal 1qt Is this right

    asked on October 22, 2008
  52. math

    5.is 3.671 less than 3.67 yes 6.A triangle has a base of 13 feet and an altitude of 7 feet. Find its area. 45.5 7.find the best buy on cashews a.12oz for $5.39 b.1lb4oz for $7.39 c.10oz for $4.89 d.1lb for $6.39 A. 12oz for $5.39 8.8gal7qt+3gal2qt= 6gal1qt

    asked on October 22, 2008
  53. math

    Someone please check my answers 1.In the number 854,263,189 what number tells the number of millions. 4 2.Write 4x4x4x4x4 as a power of 4 4^5 3.write 684 in expanded form 600+80+4 4.Turner agrees to buy a boat for $2,800 down and $129 a month for 48

    asked on October 22, 2008
  54. math

    -21-(-21)= would this be 0 or 42

    asked on October 19, 2008
  55. Social Studies

    What kind of climate occurs in most places near the equator

    asked on September 23, 2008
  56. Social Studies

    Are hurricanes an example of climates or weather?

    asked on September 23, 2008
  57. Social Studies

    Why are climates near the poles different from climates near the equator?

    asked on September 23, 2008
  58. Finite math Probability

    Classical probability of an event is a real number between 0 and 1, where 0 means: a. event is not given b. it will always happen c. it will never happen d. answer choice not given e. the choices are always not equal

    asked on June 2, 2018
  59. Finite math Probability

    Find the probability of obtaining exactly one tails when flipping four coins

    asked on June 2, 2018
  60. Calculus I

    Hello! I am taking Calculus I and am in Sec. 4.3 of Stewart's 7th Edition. I ran across a problem that I don't understand the mechanics of, could someone show me? Thanks a bunch! For what values of the numbers a and b does the function f(x)= axe^{b(x^2)}

    asked on June 26, 2014
  61. Calc I

    I'm a little confused about this one, it seems different from the rest of our homework! Could someone give me some hints? Thank you! Find the first and second derivative of the function. Check to see that your answers are reasonable by comparing the graphs

    asked on January 25, 2014
  62. Calculus

    I've been having a hard time with these lately... could someone explain it to me? Find f '(a). f(x) = (3x^2 − 3x + 4)

    asked on January 20, 2014
  63. Calculus, Limits

    Find the limit. lim t → ∞ (sqrt t + t^2)/(6t − t^2)

    asked on January 20, 2014
  64. Trigonometry

    If Hello, I have been working on this one problem for a while now and my professor is on vacation. Could someone give me a point in the right direction? Question: If sin x = 2/3 and sec y = 5/3, where x and y lie between 0 and π/2, evaluate sin(x + y). My

    asked on January 10, 2014
  65. math

    Three hundred twelve viewers were asked if they were satisfied with TV coverage of a recent disaster. Gender Female Male Satisfied 90 53 Not Satisfied 124 45 (a) Find P(satisfied). (Give your answer correct to two decimal places.) (b) Find P(satisfied |

    asked on May 28, 2013
  66. Math

    A single die is rolled. (a) What is the probability that the number on top is a 3. (Give your answer correct to two decimal places.) (b) What is the probability that the number on top is an odd number. (Give your answer correct to two decimal places.) (c)

    asked on May 28, 2013
  67. english 125

    identify at least one major similarity and one major difference between the forms of the short story and the poem.

    asked on June 7, 2012
  68. health administration

    What federal agency produces a report projecting healthcare expenditures for the coming decade?

    asked on July 12, 2011
  69. algebra

    how do you subtract 7.9 from 21

    asked on July 8, 2011
  70. math

    How do you find out what percent one number is of another?

    asked on May 2, 2011
  71. Healthcare

    What current issues affect positive communication in health care organizations today?

    asked on December 16, 2010
  72. Healthcare

    What current issues affect positive communication in health care organizations today?

    asked on December 16, 2010
  73. statistics

    in certain manufacturing processes parts must be machined tonwithin specified tolerences. the parts must have a mean length of of six inches plus or minus 0.26 inches .A SAMPLING PROCEDURE HAS BEEN ESTABLISHED to determine wether the ten parts are within

    asked on March 16, 2010
  74. m

    Solve for d C=9d answer: d= -C+9

    asked on January 6, 2009
  75. math

    Solve by multiplication principle -2x is greater than 1/9 answer: x is greater than -1/18

    asked on January 6, 2009
  76. math

    x=-2 does not have a slope does it?

    asked on January 6, 2009
  77. math

    Could someone please check these for me? 1. Find the function value if x=2 f(x)=x^3 F(2)=8

    asked on December 4, 2008
  78. algebra

    find the slope of (-4,-4) (3,-4) I came out with 0/2 so how would i type the answer

    asked on November 23, 2008
  79. algebra- Please help

    10)The formula b=30a is used in New England to estimate the minimum furnace output, b, in BTU's for a modern house with a square feet of flooring. A) determine the minimum furnace output for a 2100 ft squared modern house. B) solve formula for a Answer:a)

    asked on November 5, 2008
  80. Algebra 1

    7)use cummutative law to find and equivalent expression 73+yz answer: I don't even know where to start with this one

    asked on November 5, 2008
  81. Algebra 1

    10)The formula b=30a is used in New England to estimate the minimum furnace output, b, in BTU's for a modern house with a square feet of flooring. A) determine the minimum furnace output for a 2100 ft squared modern house. B) solve formula for a Answer:a)

    asked on November 5, 2008
  82. algebra

    find -x when x -92/29 wouldn't this be 92/29

    asked on November 5, 2008
  83. math

    I do not even know where to start with this one, can someone help? the peak of a mountain is 19,340 ft above sea level. what is the integer that best expresses the given number?

    asked on October 31, 2008
  84. math

    4. If 1 gallon of water weighs 8.34lbs, how much does 3.75 gallons weigh? 31.275lbs

    asked on October 22, 2008
  85. math

    Turner agrees to buy a boat for $2,800 down and $129 a month for 48 months. What is the total cost of the boat? $8,992 This would be 129x48=6192+2800=8992 Right?

    asked on October 22, 2008
  86. math

    find the reciprocal of (-1/5)(15)=

    asked on October 16, 2008
  87. Art

    I have looked almost everywhere on the inernet but i cant find any art websites that will show me step-by-step how to draw a school cafeteria do you all kno any websites that i can go to

    asked on October 15, 2008
  88. A thank you!

    Thanks for all your help

    asked on October 1, 2008
  89. math

    Samantha’s speedometer reads in kilometers per hour. If the legal speed limit is 55 mi/h, how fast can she drive?

    asked on October 1, 2008
  90. math

    The United States emitted 19.5 million t of nitrogen oxides (NO) into the atmosphere in 1987. One metric ton (1 t) equals 1,000 kg. How many kilograms of NO were emitted to the atmosphere in the United States during 1987?

    asked on October 1, 2008
  91. math

    Mark uses 1 pt 9 fl oz and then 2 pt 10 fl oz from a container of film developer that holds 3 qt. How much of the developer remains?

    asked on October 1, 2008
  92. math

    A school had 900 students at the start of a school year. If there is an enrollment increase of 7% by the beginning of the next year, what is the new enrollment?

    asked on October 1, 2008
  93. cells - science

    I need to make a 3-d cell. animal or plant.how do i do that and what materials do i need.not edible

    asked on September 24, 2008
  1. Science

    cast fossil

    posted on November 27, 2018
  2. Finite math Probability

    I think the answer is C (it will never happen); but can you get me on the right path?

    posted on June 2, 2018
  3. English

    Reggie, computer, store. I think that’s all :) $700 might be one though!

    posted on February 21, 2018
  4. World Civilization

    this is the least helpful way of obtaining guidance ever. Find the freaking answers.

    posted on June 7, 2017
  5. Analytical Chemistry

    I'm really sorry, but I still don't understand how all the amounts relate to each other, and I am about at my wits end. I'm not very good at math, but I am normally pretty good at chemistry and problem solving, and I don't know why I still don't get this.

    posted on June 5, 2016
  6. Calculus I

    That was so helpful!! I appreciate you writing all that out, thank you very much!

    posted on June 27, 2014
  7. Calculus, Limits

    Thank you! That was a huge help!

    posted on January 20, 2014