Popular questions and responses by Brittney
  1. chemistry

    calculate the hydronium ion concentration in an aqueous solution that contains 2.50x10^-6M in hydroxide solution

    asked on December 1, 2011
  2. Chemistry

    Balance the following equation for a basic solution. MnO4-+C2O4-2= Mno2 + CO3-2

    asked on October 27, 2013
  3. Chemistry

    If your body develops a charge of -17 (microcoulombs), how many excess electrons has it acquired, and what is their collective mass?

    asked on September 8, 2012
  4. Chemistry

    A 110.-g sample of copper (specific heat capacity = 0.20 J/°C · g) is heated to 82.4°C and then placed in a container of water at 22.3°C. The final temperature of the water and copper is 23.5°C. What is the mass of the water in the container, assuming

    asked on July 11, 2011
  5. Physics

    Please Help!!! A 920 kg sports car collides into the rear end of a 2300 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.5 m before stopping. The police officer, knowing that the coefficient of kinetic

    asked on April 17, 2011
  6. English 3

    "When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of

    asked on November 3, 2014
  7. trig plz help

    Solve, finding all solutions in the interval [0, 2π). tan(3x) = -1

    asked on March 6, 2016
  8. trigonometry

    A river is 2000 ft wide and flowing at 6 mph from north to south. A woman in a canoe starts on the eastern shore and heads west at her normal paddling speed of 2 mph. In what direction (measured clockwise from north) must she aim her canoe? How long will

    asked on January 8, 2012
  9. science

    If the magnitude of the electric field in air exceeds roughly 3 X10^6 N/C, the air breaks down and a spark forms. For a two-disk capacitor of radius 52 cm with a gap of 1 mm, what is the maximum charge (plus and minus) that can be placed on the disks

    asked on February 11, 2012
  10. Chemistry

    Ethanol (C2H5OH) is synthesized for industrial use by the following reaction, carried out at very high pressure. C2H4(g) + H2O(g) → C2H5OH(l) What is the maximum amount, in kg, of ethanol that can be produced when 1.65 kg of ethylene (C2H4) and 0.0610 kg

    asked on October 6, 2013
  11. Math

    if a number is subtracted from the numerator of 3/5 and the same number is added to the denomminator of 3/5, the result is equivalent to 1. find the number

    asked on December 5, 2012
  12. chemistry

    When cane sugar reacts with oxygen in living systems, carbon dioxide and water are produced. What weight of carbon dioxide can be produced from the reaction of 15.0 grams of cane sugar with 15.0 grams of oxygen? (Hint: balance the equation) ___C12H22O11(s)

    asked on October 9, 2013
  13. Algebra

    Find a power function of the form y=ax^b whose graph passes throught the points (2, 5) and (8, 12). How do i solve this??

    asked on April 30, 2011
  14. Chemistry

    Show, with equations, why the solution from which BaSo4 is precipitated cannot be allowed to be more then 0.01-0.05M in HCl.

    asked on February 16, 2011
  15. Psychology

    Jennifer is a 29-year-old administrative assistant married to Antonio, an Italian engineer, whom Jennifer met four years earlier while on a business trip for her marketing company. The couple now lives in Nebraska, where Antonio works for the county's

    asked on January 24, 2009
  16. psychology

    Why do negative emotions make it hard to learn or work toward a goal?

    asked on August 24, 2014
  17. math

    Write a recursive formula for the sequence: 12,-1,-14,-27...

    asked on February 12, 2013
  18. history

    How did George Kennan’s containment doctrine change during the Truman, Eisenhower and Kennedy administrations? Which president was the most successful in containing Communism

    asked on April 16, 2012
  19. physics

    A charge of 2.1 nC and a charge of 4.7 nC are separated by 57.90 cm. Find the equilibrium position for a -4.7 nC charge. ____ cm from the 2.1 nC charge. what is the answer? and how did you get it? thaanks

    asked on April 11, 2012
  20. business/accounting

    Christy Burch and Myung Lim, partners, compared their current income statement with their income statement of a year ago. They noted that sales were 12.0% higher than a year ago. They also noted that the total expenses were 20.0% higher than a year ago.

    asked on January 17, 2012
  21. Physics

    A 920 kg sports car collides into the rear end of a 2300 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.5 m before stopping. The police officer, knowing that the coefficient of kinetic friction

    asked on April 17, 2011
  22. Physics

    Suppose the roller coaster in Fig. 6-41 (h1 = 30 m, h2 = 11 m, h3 = 20) passes point 1 with a speed of 2.10 m/s. If the average force of friction is equal to one fifth of its weight, with what speed will it reach point 2? The distance traveled is 50.0 m.

    asked on April 15, 2011
  23. College Algebra

    The population of the Earth is approximately 6 billion people and is growing at an annual rate of 1.9%. Assuming a Malthusian growth model, find the world population in 44 years.

    asked on November 17, 2010
  24. Psychology

    Summarize the effects of one type of sexual dysfunction that can affect both men and women. What are some factors that may cause this type of dysfunction? What treatments may help individuals who experience this type of dysfunction

    asked on April 16, 2009
  25. chemistry

    A 0.97 m aqueous solution of an ionic compound with the formula MX has a freezing point of -2.5 ∘C .

    asked on January 30, 2015
  26. Statistics

    A survey of 1,000 adult Americans included the following question: "If the military draft were reinstated, would you favor or oppose drafting women as well as men?" Forty-three percent responded that they would favor drafting women if the draft were

    asked on May 23, 2014
  27. calculus 2

    Six and one-half foot-pounds of work is required to compress a spring 3 inches from its natural length. Find the work required to compress the spring an additional one-half inch.

    asked on May 31, 2011
  28. chemistry

    During a strenuous workout, a student generates 2000 kJ of heat energy. What mass of water would have to evaporate from the student's skin to dissipate this much heat?

    asked on October 26, 2010
  29. spanish

    how do you conjugate the verb preocuparse in the present tense in all forms??? Please if you know know how to do it correctly that wld greatly appriciated!!

    asked on January 13, 2010
  30. physics

    A nonconducting sphere with net charge +Q uniformly distributed throughout its volume creates an electric field of magnitude E at point P(not in the center) that is within the sphere. If the sphere is a conducting sphere with charge +Q, how would the

    asked on April 6, 2020
  31. Math

    If the rate of inflation is 3.9% per year the future praise P (T) and dollars I’ll pay for an item can’t be modeled by the following exponent function, where the TV is the number of youth of today

    asked on March 26, 2020
  32. English

    Oscar Wilde said, "I always pass on good advice. It is the only thing to do with it. It is never of any use to oneself." Write a paragraph discussing whether you agree with this statement and explain why or why not. You should have at least a five-sentence

    asked on February 10, 2020
  33. Fraction

    How much pizza does eight of the friends get if they have one large pizza that they share equally.

    asked on October 11, 2016
  34. Science

    What is the acceleration of a kg object if force of 3 n is applied to it?

    asked on October 4, 2016
  35. physics

    A plane 65 m above the ground is flying directly toward a target at 50 m/s . Part A At what distance from the target should the pilot drop the weight?

    asked on October 3, 2016
  36. Algebra 2B

    Come up with a new linear function that has a slope that falls in the range −< < 1 0 m . Choose two different initial values. For this new linear function, what happens to the function’s values after many iterations? Are the function’s values getting

    asked on October 1, 2016
  37. Calc-Math

    y^2+xy-3x=-5 dy/dt=-4 x=3 y=1 find dx/dt. i tried doing 2y(dy/dt)+ydx/dt-3=0 but i am not getting the right answer. Please tell me where i am going wrong.

    asked on May 24, 2016
  38. Physics

    A child sitting 1.80 m from the center of a merry-go-round moves with a speed of 1.45 m/s . Calculate the centripetal acceleration of the child.Calculate the net horizontal force exerted on the child. (mass = 28.5 kg )

    asked on April 19, 2016
  39. Math. Pls. Help!

    What factors should you consider when determining the best graph or display to represent a given set of data? In your answer, choose a set of data relevant to your life and explain the best way to display it.

    asked on March 9, 2016
  40. trig

    Find the exact values requested. No decimal approximations. Given that cot θ = 4 for an acute angle θ, A. Find sinθ. B. Find cos(2θ).

    asked on March 6, 2016
  41. math 108 trig

    1.Solve, finding all solutions in [0, 2π). cosx sin2x + sinx cosx - sinx = 0 2.Solve, finding all solutions in [0, 2π). 3sec x = 2tan^2x

    asked on March 6, 2016
  42. Math

    A square has a side length of 18 feet . This square is dilated by a scale of 1/2 to create a new square . What is the side length of the new square

    asked on March 3, 2016
  43. mathematics concepts

    Fraction symbols can usually be safely introduced A. at the beginning of third grade. B. near the end of first grade. C. near the end of third grade. D. at the beginning of second grade. my answer is c.

    asked on February 21, 2015
  44. medical coding

    this 32-year old female was burned by hot grease in her kitchen 1 week ago. She is seen in the hospital-based wound clinic for large dressing changes on both upper extremities following second-degree burns to both arms. This is accomplished without

    asked on August 14, 2014
  45. Chemistry - Please Help!

    XeO3 + I- ----> Xe + I2 (acidic solution) CN)2 -----> CN- + OCN- (basic solution) MnO2 + SO32- ---> Mn2+ + S2O62- (acidic solution) H2SeO3 + H2S -----> S + Se (acidic solution) Cl2 ---> Cl- + ClO3- (basic solution) ClNO2 -----> NO3- + Cl- (acidic solution)

    asked on October 27, 2013
  46. chemistry

    J. J. Berzelius collected the following data for three reactions: Reaction 1 – 11.56 grams of lead sulfide, PbS, were formed when 10.0 grams of lead reacted with 1.56 grams of sulfur Reaction 2 – 11.56 grams of lead sulfide were formed when 10.0 grams

    asked on October 9, 2013
  47. chemistry

    Manganese(III) fluoride, MnF3, can be prepared by the following reaction: 2MnI2(s) + 13F2(g) → 2MnF3(s) + 4IF5(l) If the percentage yield of MnF3 is always approximately 51%, how many grams of MnF3 can be expected if 40.0 grams of each reactant is used

    asked on October 6, 2013
  48. math

    what is the gross profit percent on a item bought for 3.50 at wholesale price and then sold at 5.00 for retail price

    asked on August 18, 2012
  49. algebra 1

    Choose the product. -7p3(4p2 + 3p - 1) -28p5 - 21p4 + 7p3 28p6 + 21p3 - 7p 21p3 + 8p2 + 3p4 - 8p -21p5 + 8p4 - 3p3

    asked on June 11, 2012
  50. math for elementary teachers

    Suppose that carpeting cost $12.36 per square yard at a carpet store. what will be the cost to carpet a conference room if the rooms dimensions are 110 ft by 42 ft. (the conference room should seat 380 people using 6' diameter tables each seating 10

    asked on March 19, 2012
  51. Liberal Arts

    Part 1: You finally made it…graduation day has arrived! Your parents are so proud that they are throwing you a HUGE party. They have rented a big tent for your graduation party just in case it rains. The inside of the tent (represented by the blue area)

    asked on January 14, 2012
  52. physics

    A 30 kg child steps to a dock from a 60 kg boat,giving the boat an acceleration of 2m/s^2. Neglecting water Resistance, the acceleration experienced by the child is?

    asked on October 4, 2011
  53. Essential Mathematics 1

    10 2 2/3 / 4

    asked on September 19, 2011
  54. Math

    Alex has 7 dimes and 3 nickels.What fraction of the coins are dimes?

    asked on January 25, 2011
  55. algebra

    Suppose that Maria has 140 coins consisting of pennies, nickels, and dimes. The number of nickels she has is 9 less than twice the number of pennies; the number of dimes she has is 19 less than three times the number of pennies. How many coins of each kind

    asked on January 17, 2011
  56. physics

    suppose you exert 150N on your refrigerator and push it across the kitchen floor at constant velocity. a. is the friction force equal and opposite to your 200N push? explain b. does the friction force make up the reaction force to your push?

    asked on November 6, 2010
  57. chemistry

    Exactly 10mL of water at 25 degrees C was added to a hot iron skillet. all of the water was converted into steam at 100 degrees C. If the mass of the pan was 1.20 kg and the molar heat capacity of iron is 25.19 L/mol*C, what was the temp change of the

    asked on October 26, 2010
  58. algebra

    How do you graph this liear inequality 2y greater than equal to 4x-6

    asked on September 26, 2010
  59. science

    whatis the mass of a electromanetic roller coaster?the weight?

    asked on May 25, 2010
  60. physcis

    a 16990kg airplane lands with a speed of 91m/s on a stationary aircraft carrier deck that is 115m. find workk done by nonconservative forces in stopping the plan.

    asked on March 26, 2010
  61. 9th grade


    asked on December 23, 2009
  62. Critical Thinking

    o In the future, how will thinking critically influence the ways that you: Read? Write? Process information?

    asked on April 20, 2009
  63. history

    WE have to lable characteristics of leaders. I have Adolph Hitler, Benito Musiline, and Fidel Castro. For all of them i have Intelligence, ethics, physical strength, military prowess, common sense, courage, power, confidence, and i need 4 more... can

    asked on May 12, 2008
  64. Physics

    How long does it take an automobile traveling 62.9 km/h to become even with a car that is traveling in another lane at 48.9 km/h if the cars’ front bumpers are initially 130 m apart? Answer in units of s.

    asked on September 14, 2015
  65. intermediate algebra

    the radiator in Johns car contains 16 L of antifreeze. How much of this mixture should be drained and replaced with pure antifreeze so there will be a mixture of 50% antifreeze.

    asked on May 6, 2015
  66. reading and writing

    In which sentence does the italicized word have a negative connotation? A. Although she had worked hard in high school, Ruth found the college courses challenging. B. Jenna's green eyes and dark eyelashes gave her an exotic look. C. Jack, who is the most

    asked on March 22, 2015
  67. math concept

    Sarah understands that if there are 11 ones, the first 10 move over to the tens column as one unit (i.e., one group of 10). What concept does this understanding represent? A. Renaming B. Regrouping C. Borrowing D. Place value my answer is a

    asked on February 21, 2015
  68. mathematics concepts

    Joseph is making different shapes with a rubber band and a geoboard. Which of the following would be a geometric concept that Joseph is informally exploring? A. Estimation B. Patterns C. Volume D. Probability my answer is b.

    asked on February 21, 2015
  69. cconcept development

    When a teacher chooses learning objectives for a child, which question should be asked? A. What should Kelly learn next? B. Where's Kelly in the learning process? C. Do the plan and materials fit my lesson? D. Has Kelly learned what was taught? a.

    asked on February 17, 2015
  70. concept development

    A basic rule in evaluating learning activities is to be sure A. the child has no prior knowledge. B. a variety of science process skills are used. C. the strategies are limited. D. the textbook provides step-by-step photos. my answer is b.

    asked on February 17, 2015
  71. concept development

    Which of the following process skills is generally more important for use with older children? A. Observing B. Communicating C. Classifying D. Predicting my answer I think is c.

    asked on February 17, 2015
  72. Math

    A rectangle wheat field is 10^5 m long as 10^5 m wide. What is the area?

    asked on February 15, 2015
  73. Chemistry

    An original samplemof an unknown potassium chloride/potassium cholate mixture weighed 1.042g before heating and 0.943g after heating. How many grams of oxygen were released?

    asked on February 6, 2015
  74. physics

    A marble rolls off the edge of a table that is 0.82 m high. The marble is moving at a speed of 0.11 m/s at the moment that it leaves the edge of the table. How far from the table does the marble land?

    asked on November 2, 2014
  75. math

    Explain and show hot to convert 0.765 to fraction

    asked on September 12, 2014
  76. math proportions

    What is 1000/x = 25/64

    asked on September 8, 2014
  77. math

    There are 40 students. 16 students missed class. What % of students attended class

    asked on September 8, 2014
  78. science

    I measure my head fist 28m , 65cm now i'm stuck trying to figure out how to measure my head in mm and km. I need help please.

    asked on September 7, 2014
  79. Physics

    How is the Sky Screamer at Six Flags an example of Newton's First Law?

    asked on August 25, 2014
  80. math

    Please Help!!!!! If i spent 3 hours in homework and of that time 1/3 on math and 1/5 on science, what method could i use to solve this problem????????? Please Help Thanks!!!!

    asked on April 24, 2014
  81. Math

    A motorist traveling 55 mph is being pursued by a highway patrol car traveling 65 mph. If the patrol car is four miles behind the motorist, how long will it take the patrol car to overtake the motorist?

    asked on November 5, 2013
  82. math

    Kittens weigh about 100 grams when born and gain 7 to 15 grams per day. If a kitten weighed 100 grams at birth and gained 8 grams per day, in how many days will the kitten triple its weight?

    asked on October 23, 2013
  83. chemistry

    how many H2O molecules can be formed from 200 H2 molecules and 200 O2 molecules?

    asked on October 9, 2013
  84. Physical Chemistry

    Integrate the expression β = 1/V (δV / δT) at constant pressure, assuming that β is independent of temperature. By doing so, obtain an expression for V as a function of T and β at constant P.

    asked on September 22, 2013
  85. Chemistry

    Calculate the enthalpy change when 45 g of ice at -40.0 oC is heated to completely melt to liquid water at 0.0oC. (The heat of fusion for water is 333 J/g.)

    asked on April 5, 2013
  86. physics

    The coefficients of friction between a 250 lb football sled and the grass are Mu(s)=0.6 and Mu(k)=0.4. For grass and cleats, Mu(s)=0.9. One 280 lb tryout exerts a horizontal push of 140 lb on the sled. What is the acceleration of the sled?

    asked on February 3, 2013
  87. Vista High school

    solve the following inequality. write your solutionin interval notation x^3-x

    asked on January 10, 2013
  88. algebra

    If you have 75 cents and you have 27 nickels and dimes how many nickels do you have.

    asked on January 6, 2013
  89. math

    what times 60 equals 5076

    asked on November 20, 2012
  90. math

    rewrite the equation so that y is a function of x.then use the result to find y when x= -2,-1,0,1 -2y-3x-16=0

    asked on November 19, 2012
  91. math

    rewrite the equation so that y is a function of x.then use the result to find y when x= -2,-1,0,1 -6x-1=-4y+2

    asked on November 19, 2012
  92. math

    rewrite the equation so that y is a function of x.then use the result to find y when x= -2,-1,0,1 6x-2y=10

    asked on November 19, 2012
  93. math


    asked on November 14, 2012
  94. math


    asked on November 14, 2012
  95. math


    asked on November 14, 2012
  96. Physics

    A car traveling at 20 m/s applies the brakes. The coefficients of static and kinetic friction between the tires and the road are 0.80 and 0.50 respectively. (A) Determine the stopping distance if the car is able to stop as quickly as possible without

    asked on October 25, 2012
  97. Math

    What equivalent fraction would you use to subtract 1/3 from 5/9?

    asked on October 17, 2012
  98. Chemistry

    What is the temperature of 0.45mol of gas at a pressure of 1.0at and a volume of 10.1L ? if anyone can tell me what i need to do to solve this problem it would be helpful

    asked on October 5, 2012
  99. physics

    The radius of a merry-go-round is 7 meters, and it takes 12 seconds to make a complete revolution. What is the speed of an atom on the outer rim?

    asked on October 3, 2012
  100. Math

    How do you solve a(x+1)= b solving for x

    asked on September 20, 2012


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