Popular questions and responses by sharon
  1. Chemistry

    How many moles of n2 are needed to react with 0.500 mol of lithium

    asked on October 7, 2010
  2. chemistry

    The complete combustion of ethanol, C2H5OH (FW = 46.0 g/mol), proceeds as follows: C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(l) ΔH = −555 kJ What is the enthalpy change for combustion of 15.0 g of ethanol

    asked on October 22, 2015
  3. Chemistry

    Indicate how each of the following would affect the value of the absorbance (too high, too low, or not effect) of the indicated solution. I really need help. I do not understand these questions! This is from a chemistry activity to determine the unknown

    asked on February 28, 2012
  4. Chem

    Complete the Bronsted lowry reactions HPO42-+H+ HPO42-+OH-

    asked on February 21, 2014
  5. physics

    an extreme skier starting from rest, coasts down a mountain that makes an angle 25.0¨¬with the horizontal. The coeffiecient of kinetic friction between her skis and the snow is 0.200. She coasts for a distance of 8.4m before coming to the edge of a

    asked on October 31, 2009
  6. Statistics

    If mean of 1, 2, 3, --------- n is 6n/11, then n is

    asked on July 27, 2011
  7. science

    First, you will investigate purely vertical motion. The kinematics equation for vertical motion (ignoring air resistance) is given by y(t)=y0+v0t−(1/2)gt2, where y0=0 is the initial position (which is 1.2 m above the ground due to the wheels of the

    asked on November 29, 2015
  8. phyics

    Four cars undergo acceleration as described by the data in the following table. Car Initial Velocity (m/s) Final Velocity (m/s) Time period (s) A 2.0 11.0 3.0 B -5.0 3.0 2.0 C 1.0 -5.0 2.0 D 0.0 25.0 10.0 Rank the accelerations from most positive to most

    asked on September 12, 2015
  9. finance

    computing checking account balance. based on the following information,determine the true balance in your checking account. balance in your checkbook-$356 balance on bank statement,$472 service charge and other fees, $15 interest earned on account $4 total

    asked on February 11, 2012
  10. Quantiative Methods

    Industrial Designs has been awarded a contract to design a label for a new wine produced by Lake View Winery. The Co estimates that 150 hours will be required to complete the project. The firm's three graphics designers available for assisgment to this

    asked on November 10, 2007
  11. Physics

    A person travels 4 meters North 6 meters West and 4 meters South. what is the total displacement?

    asked on December 18, 2011
  12. algebra

    courtney walks three laps around a 1/4 mile track. How many feet does she walk? if 1mile = 5280ft

    asked on February 13, 2011
  13. English 12

    this question is based on the epic of gilgamesh. How important is Enkidu's role in the battle with Humbaba? please don't post links to sites..I checked everywhere already!

    asked on December 17, 2007
  14. physics

    You are pushing a 30-kg wooden crate across the floor. The force of sliding friction on the cate is 90 N. How much force, in newtons, must you exert on the crate to keep it moving with constant velocity?

    asked on October 17, 2011
  15. grammar

    What is a simile for stone?

    asked on September 22, 2014
  16. probability

    A box contains 4 red and 3 blue poker chips. What is the probability when 3 are selected randomly that all 3 wil be red if we select chips with replacement? a.) Without replacement?

    asked on October 6, 2009
  17. Chemistry

    Refer to the net ionic equation below to answer the following questions: Co(H2O)6^+2 + 4Cl- CoCl^-2 + 6H2O 1. In what direction was the equilibrium shifted by: a. Addition of HCl b. Addition of water c. Addition of AgNO3 d. Increasing the temperature e.

    asked on January 21, 2011
  18. buisness

    I need help please: Because Saudi Arabia and Australia have ____ in production of crude oil and petroleum products and wool respectively, Saudi Arabia can specialize in the production of crude oil and petroleum products, and Australia can specialize in the

    asked on February 11, 2012
  19. Finance

    Caluating opportunity cost. what is the annual opportunity cost of a checking account that requires a $500 minimum balance to avoid service charges? Assume an interest rate of 3 percent

    asked on February 11, 2012
  20. Life Span Development

    Question 1 1-The quality of a children’s attachments has been found to affect a-what children expect social interactions to be like. b-whether children remember positive or negative aspects of events better. c-children’s concepts of themselves. d-all

    asked on December 16, 2014
  21. Statistics

    Find the area under the standard normal curve between z = 0 and z = 1.37.

    asked on February 16, 2017
  22. Chem

    Bronsted reaction HCO3-+HF acid?+base?

    asked on February 21, 2014
  23. probability

    A batch of 350 raffle tickets contatins 4 winning tickets. You buy 4 tickets. What is the probability that you have: a.) No winning tickets? b.) All winning tickets? c.) At least one winning ticket? d.) At least one non-winning ticket?

    asked on October 7, 2009
  24. physics

    a car with a mass of 1.50 x 10^3 kg starts from rest and acceleration to a speed of 18.0 m/s in 12.0 s. Assume that the force of resistance remains constant at 400.0 N during this time. What is the average power developed by the cars engine

    asked on November 9, 2016
  25. chemistry

    The hands on a battery clock are which type of energy? A. chemical to kinetic B. potential to chemical C. kinetic to potential D. thermal to kinetic I think C

    asked on February 17, 2016
  26. Math

    A sample of n _ 11 scores has a mean of M _ 4. One person with a score of X _ 16 is added to the sample. What is the value for the new sample mean?

    asked on October 20, 2012
  27. maths

    i am a even number my tens digit is 6 less than my units digit what am i

    asked on January 28, 2011
  28. Algebra

    The quotient of A number and 2, decreased by 5, is equal to 35. Find the number

    asked on January 21, 2017
  29. probability

    A pizza shop offers nin toppings. No topping is used more than once. What is the probability that the toppings are pepperoni, onions, olives, and mushrooms? Round your answer to the nearest thousandth.

    asked on October 12, 2009
  30. math

    7 freshmen, 10 sophomores, 7 juniors, and 8 seniors are eligible to be on a committee. In how many ways can a dance committee of 18 students be chosen? In how many ways can a dance committee be chosen if it is to consist of 5 freshmen, 6 sophomores, 4

    asked on October 11, 2020
  31. Chemistry; Please help

    Write formulas for the following. 1. potassium hexacyanoferrate(III) 2. sodium hexafluoroaluminate 3. Pentaaquabromomanganese(III) sulfate 4. hexaamminechromium(III) nitrate 5. sodium tetrahydroxochromate(III) 6.trans-dichlorobis(ethylenediamine)cobalt

    asked on January 26, 2011
  32. probability

    A pizza shop offers nine toppings. No topping is used more than once. What is the probability that the toppings are pepperoni, onions, olives, and mushrooms?

    asked on October 8, 2009
  33. Identifying Fallacies

    Give example of fallacy from newspaper editorial and another one from an opinion magazine. We do not do your homework for you, but here is a great site for explaining fallacies.

    asked on March 9, 2007
  34. Science in motion pHY 102

    Find the net force produced by a 30-N force and a 20-N force in each of these cases: (a) Both forces act in the same direction. The net force produced by 30-N force is 60-N The net force produced by 20-N force is 40=N Applied Forces Net Forces 30-N = 60-N

    asked on August 28, 2014
  35. Math Perimeter

    Draw a figure with 22 units

    asked on February 25, 2013
  36. psychology

    Do I have the correct answer to this question? 1. The overarching Gestalt principle of perceptual organization is that of: is =D) similarity. A) complexity. B) simplicity. C) symmetry. D) similarity.

    asked on June 6, 2011
  37. Healthcare Finance

    Jane Smith currently holds tax-exempt bonds of Good Samaritan Healthcare that pay 7 percent interest. She is in the 40 percent tax bracket. Her broker wants her to buy some Beverly Enterprises taxable bonds that will be issued next week. With all else the

    asked on September 13, 2013
  38. english

    i have to take out embellishments, misquotations,false benefits and unethical tactics out of these sentence can some one help me 1. Storm damage done to water filtration plant #3 was mimimal. While we had to shut down temporily, servive resumed to meet

    asked on January 13, 2012
  39. Physics

    A pulley system has a velocity ratio of 4 and an efficiency of 80%.calculate the value of the effort required to raise the load of 480N

    asked on February 11, 2016
  40. math

    the path of a cliff diver as he dives into a lake is given by the equation y=-(x-10)power of 2 + 75...where y meters is the divers height above the water and x metres is the horizontal distance travelled by the diver. what is the maximum height the diver

    asked on May 3, 2015
  41. physics

    if a swimmer swims 85.4 yards in five minutes, how many meters will he swim in 70.0 seconds?

    asked on September 8, 2013
  42. statistics

    A box contains 10 items, of which 3 are defective and 7 are non-defective. Two items are randomly selected, one at a time, with replacement, and x is the number of defectives in the sample of two. Explain why x is a binomial random variable. & For the

    asked on December 26, 2017
  43. Math

    order these numbers from least to greatest. 3/20, 45%, 1/5, 7.5%, 27.5%

    asked on October 16, 2016
  44. Math, Quadratic Functions, Max/Min Word Problems

    Two numbers have a sum of 72. What is their product if it is a maximum?

    asked on January 16, 2015
  45. Physics

    X-ray pulses from Cygnus X-1, a celestial x- ray source, have been recorded during high- altitude rocket flights. The signals can be interpreted as originating when a blob of ion- ized matter orbits a black hole with a period of 7.84 ms. If the blob were

    asked on December 7, 2009
  46. probability

    How many ways can 12 people be seated about a round table?

    asked on October 8, 2009
  47. math

    If you randomly select a card from a well-shuffled standard deck of 52 cards, what is the probability that the card youselect is not a 9? Write your answer as a simplified fraction.

    asked on October 13, 2020
  48. Math

    Given the following information answer questions a-d. P(A)= 0.42 P(B)=0.36 A and B are independent Round all answer to the nearest 5 decimal places as needed. a) Find P(A U B) b) Find P ( A|B) C) Find P (B|A) d) Find P(AnB)

    asked on October 12, 2020
  49. chem

    Calculate the mass of anhydrous sodium carbonate Na2Co3 required to prepare 2.5 litres of 0.50M aqueous solution.(Na=23,C=12,O=16)

    asked on September 29, 2015
  50. pre calculus

    Write the equation of the circle in standard form. Find the center, radius, intercepts, and graph the circle. x^2+y^2-12x-4x+36=0 How on earth do I do this?

    asked on March 28, 2013
  51. math

    Evaluate each expression for the given value of the variable. 2x2 for x =3

    asked on September 17, 2012
  52. Algebra II

    Howndar do I write x^2-4y^2-4x-8y=36 in standard form?

    asked on May 27, 2012
  53. math

    6. A bowl contains 10 red balls, 10 green balls and 10 white balls. a. What is the probability of drawing 2 white balls with replacement? b. What is the probability of drawing 2 white balls without replacement?

    asked on February 13, 2012
  54. Chemistry!

    1. Write balanced equations for each of the following processes. a. Chromium- 51, which targets the spleen and is used as a tracer in studies of red blood cells, decays by electron capture. b. Iodine-131, used to treat hyperactive thyroid glands, decays by

    asked on January 27, 2011
  55. math

    5 basketball teams are in a tournament and each team will play each other one time how many games will be played at the end?

    asked on October 10, 2010
  56. Algebra

    If an object is thrown upward with an initial velocity of 96 feet/sec, it's height after t sec is given by h=96t-16t^2. Find the number of seconds before the object hits the ground.

    asked on July 30, 2010
  57. punctuation and grammar

    My little sister is a big baby; she cries all the time. is this punctuation right? compound sentences use semicolons but i am not sure if this is one?

    asked on April 21, 2010
  58. statistics

    Two flower seeds are randomly selected from a package tha tcontains five seeds for red flowers and three seeds for white flowers. a.) What is the probability that both seeds will result in red flowers? b.) What is the probability that one of each color is

    asked on October 2, 2009
  59. Pre-Calculus

    I need help with this problem: The bearing from the Pine Knob fire tower to the Colt Station fire tower is N 65 degrees E, and the two towers are 30 kilometers apart. A fire spotted by rangers in each tower has a bearing of N 80 degrees E from Pine Knob

    asked on April 2, 2008
  60. liturature

    What does the term 'craft technique' mean? Example:"What is one author's craft technique found in this text that makes the writing lively?' See my answer to your question below. =) What is a story with one or more level of meanings? i need help on learning

    asked on November 8, 2006
  61. physics

    a force of 0.8N stretches an elastic spring by 2cm. find the force constant. f e = k=? f=ke 0.8=0.02 * k k=0.8/0.02 k=40N/m

    asked on May 11, 2017
  62. Math

    The Blue Jays won 17 more games than they lost. They played 52 games in all and had 3 ties. How many games did they lose?

    asked on November 2, 2016
  63. english

    Jimmy you must leave the room shut the door and be quiet. Which of the following options correctly punctuates the sentence above? A Jimmy, you must leave the room, shut the door, and be quiet. B. Jimmy; you must leave the room, shut the door and be quiet.

    asked on February 13, 2016
  64. Life orientation

    Assess the extent to which bad road use has a direct impact on physical,emotional,social ,economic aspect to family,community,country

    asked on August 27, 2015
  65. math

    what is the total amount of edging that would be required to cover all edges of a rectangular prism measuring 10 cm by 30 cm by 15 cm?

    asked on May 7, 2015
  66. algebra

    name the property that justifies (-2.6) +7 = 7+(-2.6)

    asked on January 29, 2011
  67. statistics

    It is thought that prehistoric Indians did not take their best tools, pottery, and household items when they visited higher elevations for their summer camps. It is hypothesized that archaeological sites tend to lose their cultural identity and specific

    asked on August 22, 2010
  68. statistics

    The probability that a certain door is locked is.6. The key to the door is one of five unidentified keys hanging on a key rack. Two keys are randomly selected before approaching the door. What is the probability that the door may be opened without

    asked on October 2, 2009
  69. Quantiative Methods

    Western Family Steakhouse offers a variety of low-cost meals and quick service. Other than management, the steakhouse operates with two full-time employees who work 8 hours per day. The rest of the employees are part-time employees who are scheduled for 4

    asked on November 10, 2007
  70. algebra

    A school dance committee is made up of 3 freshman, 5 sophomores, 2 juniors, and 4 seniors. How many ways are there to sit the committee in a row at a meeting if the students must sit together by grade? How many ways are there to sit the committee in a row

    asked on October 13, 2020
  71. math

    here are 13 female board members and 17 male board members. How many ways are there to make a committee of 18 board members? How many ways are there to make a committee of 18 board members if exactly 6 must be female?

    asked on October 12, 2020
  72. Microbiology

    . If you counted 20 colonies from a 0.01-ml inoculum of a 1:10 dilution of urine, how many organisms per milliliter of specimen would you report? Is this number significant?

    asked on January 16, 2018
  73. MAth

    Calculate the perimeter of a right triangle where the legs are 6 cm and 8 cm

    asked on May 7, 2015
  74. MATH(HELP)

    The ratio of guppies to angelfish in a shop was 2:3. The number of angelfish was 2/3 the number of gold fish. The shopkeeper decided to replace 1/4 of the guppies with some angelfish. The number of angelfish in the end. How many guppies were in the shop in

    asked on August 7, 2014
  75. MATH(HELP)

    The ratio of guppies to angelfish in a shop was 2:3. The number of angelfish was 2/3 the number of gold fish. The shoe keeper decided to replace 1/4 of the guppies with some angelfish. The number of angelfish she added was equal to the number of the

    asked on August 7, 2014
  76. Algebra

    Will be the graphs of each of these equations be perpendicular. 1.y=7x-9 slope=-7 y-intercept=-9 2.-3y=21x+7 y=-7x(7/3) slope=-7 y-intercept=-(7/3)

    asked on July 13, 2014
  77. Social Psychology

    Aggression is verbal or physical behavior intended to cause harm. It is difficult to think that we participate in aggressive behavior, and yet we all do at some level and at some point in our lives. We know that no one theory is ever completely accurate in

    asked on August 21, 2011
  78. math

    Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1 ½ hours. How quickly can all three fill the pool together? A. 12 minutes B. 15 minutes C. 21 minutes D. 23 minutes E. 28

    asked on March 19, 2009
  79. Quantiative Methods

    CarpetPlus sells and installs floor covering for commercial buildings. A CarpetPlus account executive, was just awarded the contract for five jobs. This executive now must assign a CarpetPlus installation crew to each of the five jobs. Because the

    asked on November 10, 2007
  80. math

    Graph the function y = -2x + . Tell whether or not each ordered pair lies on the line. Explain. (0,1) (-5,3) (1,-1) (-2,5) Graph it. Then you can see if the points are on the line.

    asked on April 4, 2007
  81. Math

    From an aeroplane in the air and at a horizontal distance of 1050m, the angles of depression of the top and base of a control tower at an instance are 〖36〗degrees and 〖41〗degrees respectively. Calculate, correct to the nearest metre, the Height of

    asked on May 8, 2020
  82. statistics

    If we wish to have a 90% confidence interval, what would be the value of α/2? Show how you arrived at this answer.

    asked on September 20, 2017
  83. Chemistry

    What is the percentage yield for a reaction if you predicted the formation of 21 grams of C6H12 and actually recovered only 3.8 grams?

    asked on March 8, 2015
  84. algebra 2

    simplify the expression -6+i/-5+i

    asked on December 14, 2014
  85. math

    Minnie has 6 country cds and 5 rock cds amanda has 5 rock cds and 6 country cds who has more cds explain

    asked on September 16, 2014
  86. American Government

    Legislation that contains ambiguous language....? A. is easy to implement B. allows for discretion on the part of those implementing the law C. prevents implementation of laws that are inconsistent with congressional intent D. is a typical strategy that

    asked on August 25, 2014
  87. biology

    Given below is the sequence of the mRNA ready for Translation" 5' - AUG CUA UAC CUC CUU UAU CUG UGA - 3' a) what is the first codon technically known as and which amino acid does it code for? b) how many amino acid residues will make the polypeptide chain

    asked on January 11, 2014
  88. Physics

    If a particle moves with velocity V PA = (2.0 m/s) + (4.0 m/s) relative to frame A, what is the velocity V AP of the frame relative to the particle? a. -(2.0 m/s) + (4.0 m/s) b. -(2.0 m/s) - (4.0 m/s) c. (2.0 m/s) + (4.0 m/s)

    asked on October 6, 2012
  89. grammar

    Sensory was intact to light touch, proprioception, and pinprick.

    asked on October 4, 2012
  90. decision science

    The university computer lab has 10 computers which are constantly being used by students. Users need help from the one lab assistant fairly often. Students ask for help at a Poisson rate of an average of 4 requests per hour for any one computer. the

    asked on May 2, 2012
  91. buisness

    could someone help me with this question? Which of the following scenarios would not be considered international business? Choose one answer. a. A Chinese manufacturer sells toys to a large toy retailer in the United States. b. Intel sells its processors

    asked on February 11, 2012

    The volume of air in a persons lungs is 615 mL at a pressure of 760 mmHG inhalation occures at the pressure in the lungs drops to 752 mmHG, to wha volume did the lungs expand I got 615*760=V2*752=621 i keep getting 621 and the answer is 620 what i'am i

    asked on July 24, 2011
  93. math


    asked on June 27, 2011
  94. Sociology

    Did I answer my questions correctly? Which sociological perspective would likely contend that the role of the mass media is to provide socialization, enforce social norms through public events, and create social stability and cohesion through collective

    asked on April 12, 2011
  95. Algebra

    5x + 4y = -8 6x - 4y = -80

    asked on July 28, 2010
  96. just for knowledge

    How much do my shares worth if Authorized capital 60,000 shares and I own 500 shares at $1.00 par value. Thank You

    asked on January 15, 2010
  97. probability

    A batch of 350 raffle tickets contains 4 winning tickets. You buy 4 tickets. What is the probability you have no winning tickets? b.) all winning tickets? c.) at least 1 winning ticket? d.) At least 1 non-winning ticket?

    asked on October 6, 2009
  98. statistics

    Two flower seeds are randomly selected from a package that contains five seeds for red flowers and three seeds for white flowers. a.) What is the probability that both seeds will result in red flowers? b.) What is the probability that one of each color is

    asked on October 3, 2009
  99. Algebra

    Snooker's lumber can convert logs into either lumber or plywood. In a given day, the mill turns out twice as many units of plywood as lumber. It makes a profit of $30 on a unit of lumber and $45 on a unit of plywood. How many of each unit must be produced

    asked on October 12, 2008
  100. math

    bobby is diving 50 feet below sea level at the beach. his sister is at the swimming pool deck, which is 15 feet above sea level. what is the difference, in feet, between the pool deck and bobby's position?

    asked on November 27, 2018


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