Popular questions and responses by kiki
  1. APChem

    Hi I tried to understand this but I don't know why the answer is B: Which one of the following pairs cannot be mixed together to form a buffer solution: A) NaC2H3O2, HCl B)RbOH, HBr C) NH3, NH4Cl D) H3PO4, KH2PO4 E) KOH, HF The answer is B but could you

    asked on March 21, 2010
  2. Physics

    X=1/2at^2 Solve for a Solve for t Can you please show me how to do this Thank u

    asked on September 5, 2014
  3. Health

    what is the section in the 'Medication problem A.C.T.I.O.N. plan ' resource that you would turn to when addressing the situation

    asked on June 2, 2015
  4. mental health

    Describe how you would support a client with acquire brain injury who demonstrated cognitive deficits as a result of his injury . identify a minimum of 2 possible problems you might encounter and what positive intervention strategies you would use.

    asked on April 20, 2015
  5. Math

    Which equation is equivalent to 3 ln 2 – ln 4 + 5 ln x = ln 3 + 2 ln 5? ln 2x5 = ln 75 ln (5x + 2) = ln 75 ln 2x5 = ln 13 ln (5x + 4) = ln 96

    asked on February 16, 2014
  6. Trig

    Write a quadratic equation whose roots are 5 + i radical 2 and 5 – i radical 2 ____ x^2 + _____ x+ ______=0

    asked on April 26, 2014
  7. Algebra

    A high diver is standing on a platform above a pool. Her diving path can be modeled by the function h(t)=-16t^2+8t+12, where h is her height in feet above the water and t is time in seconds. a) How high is the platform (initial height of the diver)? b)

    asked on March 7, 2016
  8. Math

    On a map 1/4 inch represents 20 miles the distance between two cities on the map is 3 3/4 inches how many miles apart are in the two cities?

    asked on December 8, 2014
  9. math-please help!

    Determine whether the situation calls for a discrete or continuous random variable. The number of freshmen in the required course, English 101 The braking time of a car I think the first one discrete and the second is continous is this correct?

    asked on April 25, 2010
  10. APChem

    Hi! Thank you for your help... A 25.0 mL sample of 0.723 M HClO4 is titrated with a 0.273 M KOH solution. The H3O+ concentration after the addition of 66.2 mL of KOH is ______M. (The answer is supposed to be 1.00X10^-7) How do I set this problem up? I

    asked on March 21, 2010
  11. APChem

    "The osmotic pressure of a saturated solution of strontium sulfate at 25C is 21 torr. What is the solubility product of this salt at 25C (Hint: calculate molarity from the colligative properties eqn of osmotic pressure and use it in the equilibrium

    asked on March 17, 2010
  12. health

    you are assigned to help Mrs.Smith with meals and housekeeping.Mrs smith has a large collection of tea cups.figurines and glass lamps.She wants you to dust each item separately every time you visit.this leaves no time for you to do other tasks you are

    asked on May 13, 2015
  13. APChemistry

    Hi What is the netionicequation for NaOBr disolving in watr? Thanks!

    asked on April 18, 2010
  14. Physics

    At some point during their orbit, the location of the Earth and Moon relative to the Sun will be as shown in the figure below. What are the magnitude, in N, and direction of the force experienced by the Moon, in degrees below the Sun-Moon line, due to the

    asked on March 20, 2019
  15. physics

    A 2.0-m-tall basketball player is standing on the floor a distance d from the basket, as shown in the figure below. He shoots the ball at an angle of 40.0o above the horizontal with a speed of 10.67 m/s and makes the shot. The height of the basket is 3.05

    asked on July 29, 2013
  16. Math

    Maria cut a pizza into 8 equal slices. She put a slice of pizza on 3 plates. What is the measure of the angle for the slices that are left?

    asked on April 12, 2012
  17. Chemistry

    Which formula represents an organic acid? HCOOCH3 CH3CH2OH CH3COCH3 HCOOH Can you please help me

    asked on June 7, 2014
  18. Trig

    If the period of a cosine function is 1/3 what is the frequency of the function?

    asked on March 29, 2014
  19. Algebra 2

    Which circle has the largest circumference? x2 + y2 = 8 (x – 3)2 + y2 = 10 (x + 3)2 + (y + 2)2 = 4 x2 + (y – 2)2 = radical 81

    asked on February 13, 2014
  20. math

    When a single card is drawn from an ordinary 52-card deck, find the odds in favor of getting a red 10 or a black 6. I think the answer is 1:12. Is that correct?

    asked on April 25, 2010
  21. Biology

    Could someone explain what concentration gradient is? My book doesn't give a definition, and the definitions on the web that I've found don't explain it very well.

    asked on November 1, 2007
  22. Economics 201

    Determine the price elasticity of demand for a microwave that experienced a 20% drop in price and a 50% increase in weekly demand quantity. I know I have to use the price elasticity of demand formula, but I keep getting the wrong answer. Can someone please

    asked on October 28, 2017
  23. Math Help

    Two people are selected at random from a group of 6 pilots and 4 engineers. What is the probability that both of them are engineers?

    asked on June 11, 2015
  24. APChem

    Is this true or false?:A buffer can be destroyed by adding too much strong acid. I thought that a buffer can be destroyed by adding too much weak acid, but I'm not sure...

    asked on March 7, 2010
  25. Calculus

    Based on a preliminary report by a geological survey team, it is estimated that a newly discovered oil field can be expected to produce oil at the rate of R(t) = 800t^2/(t3 + 32)+ 5 (0 ≤ t ≤ 20) thousand barrels/year, t years after production begins.

    asked on April 26, 2018
  26. math

    Explain how to graph information from the table

    asked on January 6, 2016
  27. math fractions

    Lana`s toy boat can sail 7 1/2 yards in 4 1/6 minutes. How far would it sail in 8 3/4 minutes if it kept the same pace?

    asked on October 1, 2015
  28. math fractions

    Sophie jogs four and one-fourth miles in seven-eighths hour. How far would she run in four and one-half hours if she kept the same pace?

    asked on September 30, 2015
  29. History

    What was the effect of this cartoon in 1867? It demonstrated the weakness of the veto power. It showed that the president was well equipped for his job. It emphasized the authority of the U.S. Constitution. It validated the need for more control of the

    asked on June 5, 2015
  30. Math

    A car was purchased for $36,730. The following equation can be used to predict the value of the car based on it age, where t stands for the time in years: A = 36730(.82)t. If the car was purchased in March 2002, what will its value be in September 2009?

    asked on February 16, 2014
  31. Chemistry

    At STP 4 liters of O2 contains the same total number of molecules as 1L of NH3 2L of Cl2 8L of He 4L of CO2

    asked on November 2, 2013
  32. Math

    In the accompanying diagram, abcd is a rectangle with ab as a diameter of semicircle o. Diagonal bd is drawn in rectangle abcd. The length of bd exceeds the length of ab by 1, and ad=5. Please help thank you

    asked on December 23, 2012
  33. math

    what is the difference between the two expressions below: -4squared (-4)squared can you please help, thank u

    asked on September 25, 2012
  34. math

    can you please help me represent the total nummber of calories in x peanuts and y potato chips if each peanut contains 6 calories and each potato chip contain 14 calories. thank u

    asked on September 15, 2012
  35. math

    can u please help me. represent the total number of days in w weeks and 5 days represent the total number of days in w weeks and d days thank you

    asked on September 15, 2012
  36. Geometry

    To find the height of a tree, a man stands at point T. His height RT=6 ft. He stands 15 feet from point S and 25 feet from point U. What is the height of the tree, QU? A.)12 ft B.)15 ft C.)16 ft

    asked on July 14, 2012
  37. psychology

    What are the effects of type of processing and channel of presentation on recall of words? HELP!!!!!!!!!!!

    asked on December 13, 2011
  38. physics

    Two asteroids, each with a mass of 6 million kilograms are attracted gravitationally with a force of 0.75 N. How far apart are their centers?

    asked on December 6, 2011
  39. APChemistry

    If you have CL2 + H2o ---> H+ + Cl- + HOCl and you are given [HOCl] = 0.06 M and you have to find pH.... can you assume that [HOCl] =[H+] = 0.06 M since H+ and HOCl both have a coefficient of 1? Thank you

    asked on April 18, 2010
  40. APChemistry

    If you have CL2 + H2o ---> H+ + Cl- + HOCl and you are given [HOCl] = 0.06 M and you have to find pH.... can you assume that [HOCl] =[H+] = 0.06 M since H+ and HOCl both have a coefficient of 1? Thank you

    asked on April 18, 2010
  41. APChemistry

    If you have CL2 + H2o ---> H+ + Cl- + HOCl and you are given [HOCl] = 0.06 M and you have to find pH.... can you assume that [HOCl] =[H+] = 0.06 M since H+ and HOCl both have a coefficient of 1? Thank you

    asked on April 18, 2010
  42. APChemistry

    Hi If I had 40 mL of 0.1 M HOBr and mixed that with 10 mL of 0.5 M Ca(OH)2 how would I go about calclating the pH? (i don't know if titration is right because equivalence, halfway pts, etc.. are not specified).. Thank you very much.

    asked on April 18, 2010

    A shoe store carries one brand of shoe in 3 styles, 5 sizes, and 4 colors. How many different shoes are available for this one brand?

    asked on April 12, 2010

    The mean height of 5 students is 61.8. If one of the students leaves, the mean height becomes 60. What is the height of the absent student?

    asked on April 12, 2010
  45. English

    Paragraph One: the Resume Statement I need to write a one paragraph resume statement. This paragraph will go at the top of my resume, and convince the human resource officer to take my application seriously. It must be persuasive. Paragraph Two: The

    asked on September 5, 2009
  46. Social Studies

    1. why did sugar plantations produce such high profits a. sugar can was easy and cheap to grow b. the colonial governors placed a high tax on sugar c. europe had a high demand for sugar, molasses, and rum*** d. spanish plantation owners sold tons of sugar

    asked on November 16, 2018
  47. Statistics

    Assume the weights of Farmer Carl's potatoes are normally distributed with a mean of 7.0 ounces and a standard deviation of 1.3 ounces. He bags his potatoes in groups of 6. You buy a bag and the total weight is 36 ounces. Here we determine how lucky or

    asked on November 3, 2017
  48. english

    Which of the following is a reason to use parallel sentence structures in a literary analysis essay?

    asked on May 14, 2017
  49. language arts

    The seven wonders of the world is mostly about which of the following. A.The pyramids of Egypt. B.Architecture around the world. C.Incredible ancient structures. D.Respected building techniques. I think its's B or C.

    asked on December 5, 2016
  50. Math

    Draw and label examples of all rectangular prism built with 16 unit cubes

    asked on April 1, 2016
  51. math fractions

    1 3/10+2 1/7+2/5

    asked on October 1, 2015
  52. math

    5 1/3-2 3/7

    asked on October 1, 2015
  53. math fractions

    seven-twentyfourths*one and seven-eighths/three and one-half

    asked on October 1, 2015
  54. math fractions

    eleven*two and two-thirds/one and four-sevenths

    asked on October 1, 2015
  55. math fractions

    one and two-sevenths/one and nine-fourteenths

    asked on October 1, 2015
  56. math

    six*one and one-fourth*one and two-thirds

    asked on October 1, 2015
  57. math fractions

    one and five-sixths/one-half/twelve

    asked on October 1, 2015
  58. math fractions

    3 3/7*2 7/12

    asked on October 1, 2015
  59. math fractions

    The teacher gives each pair of students one and fourteen-fifteenths liters to water their plants in the garden. If the pairs of students share the water evenly how much water does each student get

    asked on September 30, 2015
  60. math fractions

    12 liters of water flow out of the faucet every three-fifths minute. How much water flows out each minute?

    asked on September 30, 2015
  61. mental health

    Describe how acquired brain injury can affect the family.

    asked on April 20, 2015
  62. Physics

    If a string is vibrating in four parts, there are points where it can be touched without disturbing its motion. Explain how many points exist

    asked on November 26, 2014
  63. math

    find the quotient then check your answer 3/14.1

    asked on October 22, 2014
  64. Physics

    Spark timer acceleration lab How do you determine the acceleration from the slope of your best fit line?

    asked on October 17, 2014
  65. Trig

    If sec A =5/4 and A is an angle in Quadrant IV, find the value of cos A. A. -4/5 B.4/5 C.-5/4 Is it choice A

    asked on April 26, 2014
  66. Trig

    If 0 ≤ x ≤ 2π, which equation is a line of symmetry for the graph of y = cos x? x = 0 x = 2π x = π y = 0

    asked on March 30, 2014
  67. Math

    The parents of twin boys started a college fund when the boys were 5 years old. They decided to invest $6,000 into an account that compounds quarterly at a rate of 8.6% annually. If the parents do not invest any additional money into this fund, how much

    asked on February 16, 2014
  68. Global history

    Which of the following provides evidence that imperialism left a lasting impact on many colonial territories? A. Many African and Asian nations are based on former colonial boundaries. B. Many former colonies are still ruled by European governments C.

    asked on December 16, 2013
  69. Chemisty

    At STP 4 liters of O2 contains the same total number of molecules as 1L of NH3 2L of Cl2 8L of He 4L of CO2

    asked on November 2, 2013
  70. chemistry

    caculate 230 ml of 1.1 molarity HCl solution

    asked on July 5, 2013
  71. math

    can you please help. If a plane travels 550 kilometers per hour, represent the distance it will travel in h hours. thank you

    asked on September 14, 2012
  72. physics

    A 1400kg car starts at rest and rolls down a hill from a height of 12m. (a) how much kinetic energy does the car have at the bottom of the hill?(b) how fast is the car going at the bottom of the hill? Can someone explain how to do it!

    asked on November 30, 2011

    Explain, in terms of particles, concentration, and reaction rate, what you expect to happen when methane gas (CH4) and hydrogen sulfide gas (H2S) are sealed in a flask and reach a state of equilibrium. CH4 (g) +2 H2S (g) -->

    asked on August 5, 2011
  74. apchemistry

    thank you for your help before---also, what can i react with BaO to get some noticable consequence---how can i show that what MgO was involved in the reaction?

    asked on April 29, 2010
  75. APCHemistry

    Hi these are the posts from earlier---i just had a quetsion about your response: ""Apchemistry - DrBob222, Monday, April 26, 2010 at 7:10pm Your thinking is ok. All ionic solids, although composed of ions, are locked into place by the crystal lattice

    asked on April 26, 2010
  76. math

    Determine whether the situation calls for a discrete or continuous random variable. The number of freshmen in the required course, English 101 The braking time of a car I think the first one discrete and the second is continous is this correct?

    asked on April 25, 2010
  77. math

    Attendance records at a school show the number of days each student was absent during the year. The days absent for each student were as follows: 8 2 4 3 2 7 6 0 9 3 3 4 2 4 6 Create a dot plot for this data

    asked on April 11, 2010
  78. math-word problem

    Media Services charge $20 for a phone and $30/month for its economy plan. The equation C=30t +20 describes the total cost, C of operating a media service phone for t months. The total cost for 10 months of service is... My answer is $320 for 10 months

    asked on March 27, 2010
  79. math

    Finding the domain of G(X)=4/4-3X So would the domain be 3 then?

    asked on March 26, 2010
  80. APChem

    If an air bubble passes unnoticed through the tip of a buret during a titration (where a weak nonvolatile acid HA is the analyte) , the calculated molar mass of HA would be too high, too low, or not affected? I thought it would be too high, since an air

    asked on March 7, 2010
  81. APChem

    does anyone know a good website i could look at so i could answer this question: ? Explain how indicators work using a chemical reaction as part of your explanation. Any websites? please? thank you!!

    asked on February 27, 2010
  82. chemistry

    What is the molecular structure of the molecule AlCl3? What characteristic is notable about the structure that helps us to understand the acidic nature of AlCl3?Write a chemical reaction between AlCl3 and NH3 ignoring any reaction between AlCl3 and the

    asked on February 23, 2010
  83. poem

    Is this a good title? Believe in yourself If there ever is a time That you shall fall Pick yourself up And stand up Be proud who you are Every single day Believe in yourself And you succeed that way Think about your future Think about your dream Push

    asked on January 15, 2009
  84. science

    A bicyclist was riding down a road. At 2.0 s, his speed was 2.0 m/s. At 5.0 s, his speed was 8.0 m/s. What was his acceleration from 2 to 5 s?

    asked on March 19, 2020
  85. Geometry

    Use an algebraic equation to find the measures of the two angles described below. Begin by letting x represent the degree measure of the​ angle's complement. The measure of the angle is 18 degrees greater than its complement. What is the measure of

    asked on September 17, 2019
  86. Statistics

    Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $30,000 and $45,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired. Given

    asked on April 24, 2019
  87. Physics

    A blood sample placed in a centrifuge is subjected to a force of 4.8 10-11 N when the centrifuge is operated at 126 rev/s. What is the diameter, in cm, of the centrifuge?

    asked on March 7, 2019
  88. Civic

    A nonprofit organization does not issue stock shares or distribute its extra funds to ownership or shareholders. If all businesses were required to operate a nonprofit organization, how might that hurt a free market economy? A. People would be less likely

    asked on March 4, 2019
  89. math

    There are 24 inches of ribbon in each spool. Margaret needs 384 inches of ribbon. Which equation can Margaret use to find the number of spools, s, she needs?

    asked on November 13, 2018
  90. Math

    Why do you have to use estimation to find the number of triangles you need for the string? (I need Help Please!!!!)

    asked on October 22, 2018
  91. Reading and comprehension

    Who gave the Statue of Liberty to the United States?

    asked on October 5, 2018
  92. Sewing

    List and draw five sleeves of your choice not types like reglan or set in but examples

    asked on October 5, 2018
  93. geography

    how are bays and headlands formed

    asked on October 5, 2018
  94. History

    1) Why did The British want to expand control into the Ohio Valley in the mid 17,000s? A) to force the French out of North America B)to put French settlers there under English rule C)to demonstrate Britain’s strength to France and Spain D)to gain access

    asked on September 6, 2018
  95. Pre algebra

    Which expression can be written as 9•(12+7)? A) 9+(12+7) B)(9+12)•(9+7) C)9•12+7 D)(9•12)+(9•7)

    asked on August 24, 2018
  96. Math

    Help thanks...what are some examples, no, all examples of isopentagons that you know of/can think of? I'm making some tessellations and I only know one type. Thanks in advance.

    asked on May 25, 2018
  97. World History

    Which factor was a challenge to the expansion and control of Roman territory? its location on the Mediterranean Sea its available local resources its lack of military leadership its location near Celtic and Germanic tribes

    asked on May 19, 2018
  98. Is this correct? Algebra

    9. Joe wants to fence a rectangular pen for his goats. the length of the pen should be at least 60 ft, and the distance around should be no more than 260 ft. Which system of inequalities and graph represent the possible dimensions of the pen? I want to

    asked on February 7, 2018
  99. Statistics

    I don't understand this at all.. Assume that the weights of Chinook Salmon in the Columbia River are normally distributed. You randomly catch and weigh 40 such salmon. The mean weight from your sample is 24.1 pounds with a standard deviation of 3.5 pounds.

    asked on November 23, 2017
  100. Calculus

    Given that f(150)=100, f'(150)= -2.5, approximate the value of f(151.5). The answer is approximately 96.25, but I'm unsure of how my teacher has gotten that answer. Can someone please explain this to me?

    asked on October 6, 2017


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