Davis

Popular questions and responses by Davis
  1. Chem

    Bromine has two natural occurring isotopes (Br-79 and Br-81) and has an atomic mass of 79.904 amu. The mass of Br-81 is 80.9163 amu, and its natural abundance is 49.31%. Calculate the mass and natural abundance of Br-79.

    asked on August 28, 2011
  2. Chemistry

    Samples of three different compounds were analyzed and the masses of each element were determined. Compound Mass Mass N(g) O(g) A 5.6 3.2 B 3.5 8.0 C 1.4 4.0 If you were John Dalton and had never heard of a mole, which of the following would you think were

    asked on August 29, 2011
  3. Physics

    A firefighter with a mass of 52 kg slides down a vertical pole with an acceleration of 3 m/s/s . The acceleration of gravity is 10 m/s/s. What is the friction force that is acting on him

    asked on October 30, 2014
  4. math

    A chocolate cookie recipe that makes 24 cookies uses 3/4 cups of brown sugar. If John wants to make 72 cookies, how much brown sugar does he need?

    asked on June 25, 2013
  5. Chem!!!:/

    Calculate the ratio of NaF to HF required to creAte a buffer with pH=4.00.

    asked on March 12, 2012
  6. basic chem

    1)an atom has a mass number of 27 and 14 neutrons. what is the atomic number of this atom? 2)The atomic number of fluorine is 9. What is the mass # of a fluorine atom with 8 neutrons?

    asked on August 28, 2011
  7. Chemistry II

    How long would it take for 1.50mols of water at 100.0deg C to be converted completely into steam if heat were added at a constant rate of 16.0j/s

    asked on February 4, 2010
  8. math

    The ã61 (square root of 61) is between what two whole numbers?I am a little bit losed when coming up with the answer can I trouble you for some help.

    asked on September 27, 2010
  9. maths

    two angles of a triangle are m° and (m+20)°.their sum is greater than the third angle.find the range value of m

    asked on August 30, 2019
  10. math

    a movng company wants to buy a new type of truck and needs to know the volume of the storage compartent before they can decide if they should purchase the truck. What is the volume of the storage compartment? 10ft, 18ft, 8ft, 2ft, 15ft.

    asked on December 27, 2012
  11. Math algebr

    Desire which property is illustrated by the given statement Which property is illustrated by the equation 3/7 (-17) = - 17 ( 3/7) A. Commutative property of multiplication B. Associative property of addition C. Distributive property D. Associative property

    asked on August 18, 2015
  12. math

    Simplify 4 to the 7th over 5 squared all raised to the 3rd power. 4 to the 10th over 5 to the 5th 4 to the 4th over 5 4 to the 21st over 5 to the 6th 12 to the 7th over 15 squared

    asked on August 24, 2017
  13. chemistry

    How many grams of NaCl should be added to 250 grams of water to make a 0.40 m solution? I got 19 grams. this is how I got it. first I found the mass of water = 18g then I converted that to mols 18/250 = .0072. I subtracted 0.072 - 0.40 = 0.328 I found the

    asked on March 24, 2007
  14. IT/Proj Mgmt

    Innovative Systems is ready to get started using the PMI standard. BPP is advising IS on a new project bid. The project involves setting up an automated tracking system for a library. Radio frequency (RF) tags would be attached to each book, and a

    asked on June 21, 2009
  15. trig

    Use trigonometric identities to find sec theta, given that tan theta = Radical 5/ 3.

    asked on August 26, 2011
  16. math

    I am having problems coming up with the answer to this problem. Could you kindly help me. It took Amanda 3 hours and 20 minutes to drive from her home to a friend’s house. She then drove to the beach which took her 4 hours and 25 minutes. It only took

    asked on September 27, 2010
  17. math

    Sally's $1,800 savings is in two accounts. One account earns 6% annual interest and the other earns 3%. Her total interest for the year is $93. How much does she have in each account?

    asked on November 19, 2019
  18. math

    Find the median of the following set of numbers. 45, 21, 55, 22, 65, 61

    asked on September 24, 2010
  19. Trig

    Find the angle of the measure formed by the clock. 2:15

    asked on August 29, 2011
  20. trig

    Suppose that 0degrees

    asked on August 26, 2011
  21. math

    find the median and mean of this numbers 95,75,86,96,70,68,76,81,95,76,69,83,93,88,94 Is the median 83and the mean 83 if i arrange the numbers in ascending order

    asked on September 24, 2010
  22. math

    (-6)^2-4^2 How wouLD I WORK THIS PROBLEM OUT

    asked on September 22, 2010
  23. HCA/220

    ◦Scenario 2: You are an allied health professional working with an orthopedist. You have been working with the patient and need to update the doctor on the reason for the patient’s visit. Begin describing the patient’s concerns. Your classmates may

    asked on January 10, 2010
  24. PSY HELP!!! Please

    Match the psychological theories with the appropriate statement(s): Psychodynamic Theory Trait Theory Learning Theory Sociocultural Humanistic Theory Popular theorist Eysenck initiated the five-factor model. The healthy personality is found in balancing

    asked on October 24, 2008
  25. AP Chemistry

    Calculate the pH of a 75.0 ml solution containing 0.85 M lactic acid after the addition of 0.0225 moles NaL (assume a negligible volume change.)

    asked on April 9, 2012
  26. Math

    If you have a line intersecting at (3,6). What equation would represent both lines?

    asked on February 8, 2017
  27. chemistry

    calculate the molar concentration of 0.1 " AgNO3

    asked on October 2, 2015
  28. trig

    Suppose that 0degrees

    asked on August 28, 2011
  29. trig

    Use the appropriate identity to find tan(theta) given that cot theta =0.05.

    asked on August 26, 2011
  30. english

    John gave Samuel his hockey stick. In this sentence, Samuel is the ____.

    asked on May 19, 2011
  31. Math 8th grade

    How would I set up this problem to solve it: Gene offers 30 mins. and 60 mins. driving lessons. He gave 8 lessons that lasted 7 hours. How many 60 minute lessons did he give?

    asked on February 8, 2017
  32. math

    can I trouble any one with this que stion. I got jello brain right now. 7-(-1)/3(2)-9/(-3)

    asked on September 27, 2010
  33. math

    (-8)2 – 8(2 )= I need help with this problem i have wrecked my brain and havnt came up with the answer

    asked on September 27, 2010
  34. math

    how would you use the concepts from chapter 8 in real life situation? Decribe how these concepts might be useful

    asked on September 14, 2010
  35. Math

    you lave a line intersecting at (3,6) what would represent the two lines?

    asked on February 8, 2017
  36. Government

    I think it is ( C ) but not sure, can someone verify correct answer Which part of Congress was designed to be more responsive to the citizens? A) Senate B) House C) Both Senate and House D) Neither Senate nor House

    asked on November 19, 2015
  37. PRECALCULUS

    solve: tantheta = sintheta

    asked on January 23, 2012
  38. trig

    5sin^2 270degrees -3cos180degrees-tan(-180degrees) i got -2 but I'm not sure if i did it right?

    asked on August 28, 2011
  39. english

    What is the compound subject of the following? Tamara and Janet served soup and salad at the luncheon.

    asked on May 19, 2011
  40. english

    What is the subject of the following sentence? Please help me figure this out! a. Please b. help c. me d. You (implied)

    asked on May 18, 2011
  41. english

    Identify the indirect object in the following sentence: Fernando read Miguel a bedtime story.

    asked on May 18, 2011
  42. math

    Can any one help me with this problem am having trouble with coming up with the answer. 7-(-1)/3(2)-9/(-3)

    asked on September 28, 2010
  43. math

    11. Place the following set of numbers in ascending order. 20, –7, 5, –5, 12, 4, 15

    asked on September 24, 2010
  44. math

    (-9)(5)/-3

    asked on September 22, 2010
  45. math

    How would you use the concepts from Chapter 8 in a real-life situation?

    asked on September 12, 2010
  46. math

    . Which pair of fractions is proportional?0.8/0.4=3.2/2.4 or 0.8/0.4=4/2.4 or 0.8/0.4=3.2/2.4 or 0.8/0.4=4/2.4

    asked on September 11, 2010
  47. math

    Carol has 22% of her pay withheld for deductions. If she earns $680 per week, what amount is withheld?

    asked on September 11, 2010
  48. HCA/220

    ◦Scenario 3: You have just started your career as a physical therapist and have been assigned to a mentor. Begin a discussion with your mentor that mentions specifically how you have helped your patients improve their mobility and aided in their

    asked on January 10, 2010
  49. Gov

    Can state elections go into runoff?

    asked on October 21, 2015
  50. english

    Research skills are primarily valued for which of the following reasons

    asked on February 8, 2015
  51. english

    Which of the following sentences contains an error? A) The student's attitude did not help her succeed. B) How many students are you planning to hire? C) Student's need to work hard if they want to receive good grades. D) Students' votes are important in

    asked on May 21, 2011
  52. math

    -2-6

    asked on April 2, 2011
  53. math

    Can some one please help me I had developed jello brain today. Can some one explain to me why the line x = - 2 is avertical line. and what the slope would be for the line. and why its diffenrence for y = -2 . what would the slope be for y = -2. Please I am

    asked on October 25, 2010
  54. math

    4-(-3)+1/2-2/(-2)

    asked on September 22, 2010
  55. math

    16?(-2)+(-4)/2^3+4 How would i work out this problem to get to the soultion

    asked on September 22, 2010
  56. HCA/220

    Scenario 1: You are attending a wellness conference and one of the exhibitors is a chiropractor in your local area. You are unfamiliar with chiropractic care and want to learn more. Since you are at the conference, the doctor assumes that you have

    asked on January 10, 2010
  57. Physics

    A spring with a spring constant k=450.0 N/m is attached to a mass of m=8 kg and stretched -0.5 m from its equilibrium position and released. What is the speed of the block when it is at the equilibrium position?

    asked on October 24, 2012
  58. physics

    what is nature of a graph of period against angle

    asked on November 24, 2011
  59. english

    Which of the following pronouns shows possession? they - them - her - its

    asked on May 18, 2011
  60. math

    (-4)(5)=

    asked on April 2, 2011
  61. math

    I need to see if i worked this problem right. -8 - -7 =-15 -8+-7=-15 do i add this together aredo i subtract and get -1

    asked on September 28, 2010
  62. math

    - 2.3 – (- 8.9) does it equal -6.6 or x= 2/3=4/6=6/9 x=8/9-6/9=2/9

    asked on September 24, 2010
  63. math

    -1/2-(-5/8)

    asked on September 22, 2010
  64. math

    -3.4-(-7.6)

    asked on September 22, 2010
  65. math

    -9--4

    asked on September 21, 2010
  66. math

    What is the population of Europe in 2000? (b) What is the total area of Europe?

    asked on September 16, 2010
  67. math

    Carol has 22% of her pay withheld for deductions. If she earns $680 per week, what amount is withheld?

    asked on September 12, 2010
  68. Government

    Need help What is the difference between a member of the President’s cabinet and a czar? A)There is no difference. B)Czars are confirmed by the Senate but not cabinet members. C)The President appoints cabinet members but Congress appoints czars. D) Both

    asked on November 19, 2015
  69. math

    2+3x+4 input x=3 and output y=6

    asked on January 31, 2011
  70. math

    Find the five-number summary of the following set of numbers: 349, 243, 119, 363, 246, 505, 263, 221, 324

    asked on September 24, 2010
  71. math

    (-6)2 (-4)2

    asked on September 21, 2010
  72. math

    soltion for -3( -6)+(4)(-2)

    asked on September 21, 2010
  73. math

    1/3+(-5/6)+-1/2=

    asked on September 19, 2010
  74. math

    3/7-6/7,1/7,-1/2,2/7

    asked on September 19, 2010
  75. math

    help! what ia 1/4(sin4x)? just to jump start this proof

    asked on May 21, 2012
  1. french language

    Yes please.

    posted on June 7, 2019
  2. math

    I SWEAR THIS TEACHER OR WHOEVER IS SOOOOO COMPLICATED. JUST GIVE HIM THE ANSWER. AINT NOBODY GOT TIME FO THAT.

    posted on June 8, 2018
  3. Math 8th grade

    Corrected the question from earlier If you have a line intersecting at (3,6). what equation would represent both lines?

    posted on February 8, 2017
  4. Math 8th grade

    What is the equation for this problem

    posted on February 8, 2017
  5. Chemistry

    =1/2 [0.2x2x1*2 + 0.2x1x(-2)*2] =1/2 [0.4 + 0.8] =1/2 [1.2] = 0.6

    posted on August 6, 2016
  6. Science

    Connections here!

    posted on April 20, 2016
  7. Government

    so correct answer is house

    posted on November 19, 2015
  8. Government

    so is the correct answer ( D )

    posted on November 19, 2015
  9. health

    people need to reread the question on the test they have because the answers may not be in the same order

    posted on September 24, 2015
  10. Chemistry

    Your answer is correct.

    posted on June 30, 2013
  11. math

    there are 4 cows and 8 ducks

    posted on March 25, 2013
  12. AP Chemistry

    Thanks Dr. Bob!

    posted on April 9, 2012
  13. AP Chemistry

    How do I figure out the Pka value?

    posted on April 9, 2012
  14. AP Chemistry

    DrBob--How do I determine the Pka value?

    posted on April 9, 2012
  15. psychology

    1.Who came up with the psychosexual stages? *Sigmund Freud Skinner Gardner Lada Gaga 2.Which psychologist tested classical conditioning with dogs? B. F. Skinner *Ivan Pavlov Igor Pavlov Sigmund Freud 3. Explain the difference between operant conditioning

    posted on February 6, 2012
  16. SCIENCE!!!!!!!!!!!!!!111111

    A unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.

    posted on August 29, 2011
  17. algebra

    I believe you get .0030864. solve what's in the parenthesis first then ^2. turn fractions into decimal format then add them and ^2.

    posted on August 29, 2011
  18. Algebra

    As time passes, the ticket sales get higher. Each time you plug in different values of X, the day tickets go on sale, your Y value increases.

    posted on August 29, 2011
  19. Algebra

    For D)..... Your parabola should be negative because of the -2X^2. SO the parabola when you graph it is a backwards U. The middle of the backwards "U" has a high maximum so your tickets should be at a peak during the middle of the sale.

    posted on August 29, 2011
  20. math

    third one is true

    posted on August 29, 2011
  21. science

    1meter=1X10^-9 nanometers 1meter=1X10^-6 micrometers 1meter=1X10^-10 Angstrom 1meter=1X10^6 MegaMeter

    posted on August 29, 2011
  22. chemistry

    Use the Molarity Formula Molarity= moles/liters of solution Molarity= moles/0.050 Liters To find moles you have to find the moles of each sample of KBr. SO 1.00M KBR times .025liters =.025moles And then 0.800M KBR times .075liters=.060moles. Then you add

    posted on August 29, 2011
  23. Chem

    oh okay i get it now, thank you! Why did you subtract 1.00 from the abundance though? how do you know?

    posted on August 28, 2011
  24. Chem

    (79.904)=(80.9163)(0.4931) + x(0.4931) 79.904=39.90 + 0.4931x 40.004=0.4931x x=81.13amu

    posted on August 28, 2011