Most popular questions and responses by gloria
  1. Pre-algebra

    Which expressions are equal to 120 Multiple chose 1. 5! 2. 6! 3. 6p3 4. 12p10 I think the answers are 5! and 6p3

    asked on March 9, 2016
  2. physics

    If motor M exerts a force of F=(10t2+100)N on the cable, where t is in seconds, determine the velocity of the 25kg crate when t=4s . The coefficients of static and kinetic friction between the crate and the plane are μs=0.3 and 0.25 μk=0.25 . The crate

    asked on November 7, 2013
  3. Chemistry

    When 50.0g of silicon dioxide is heated with an excess of carbon 32.2 g of silicon carbide I'd produced. SiO2(s) + 3C(s) → SiC(s) + 2CO(g) A. What is the percent yield of this reaction? B. How many grams of CO gas are made?

    asked on January 7, 2013
  4. Chemistry

    The following unbalanced equation describes the reaction that can occur when (II) sulfide reacts with oxygen gas to produce lead (Il) oxide and sulfur dioxide gas: PbS+O2---> PbO + SO2 Balance the equation and describe in words the electron transfers that

    asked on May 8, 2015
  5. Analytical chemistry

    The iron in a 0.6656 g ore sample was reduced quantitatively to the +2 state and then titrated with 26.753 g of KMnO4 solution. Calculate the percent Fe2O3 in the sample. the mass i get for fe2o3 is too big, but i don't know how else to do this problem,

    asked on August 3, 2013
  6. Science

    State in words the specific information conveyed by a label reading 0.25M Oxalic acid.

    asked on January 16, 2013
  7. English,sepedi,agriculture,economics,lifesciences,maths literacy & life orientation

    Identify 3human rights violations or discrimination and explain in an introductory paragraph why you choose the specific human rights violation or discrimination

    asked on April 16, 2016
  8. Information systems

    Is video conferencing really a viable green alternative to travel for most companies

    asked on March 21, 2017
  9. chayyenne

    A 26' long painting is how many yards long?*

    asked on July 5, 2014
  10. Chemistry

    Iron -59 has a half -life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that of a new sample of iron? Show all calculations leading to a solution.

    asked on May 8, 2015
  11. Analytical chemistry

    A dilute perchloric acid solution was standardized by dissolving 0.2445 g of primary standard sodium carbonate in 50 mL of the acid, boiling to eliminate CO2, and back-titrating with 4.13mL of dilute NaOH. In a separate titration a 25mL portion of the acid

    asked on August 1, 2013
  12. Maths

    Convert 59.4 mi to km (1 m= 1.094 yd, 1 mi=mi=1760yd)

    asked on October 19, 2017
  13. chemistry

    A standard solution of FeSCN2+ is prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN. The equilibrium concentration of FeSCN2+ ([FeSCN2+]std) for this standard solution is assumed to be ____ M.

    asked on April 10, 2008
  14. statistic

    A marriage counselor conducted a study of couples, categorizing each of the couples as "communicative" or "non-communicative." Among other things, the counselor wanted to see whether the percentage of communicative couples whose marriage ended in

    asked on November 19, 2018
  15. lee college

    How many bromine molecules, Br2, have a mass equal to 31.8 g?

    asked on November 17, 2009
  16. Analytical chemistry

    Below i wrote a few problems, i did them all but in the book i don't have results, so i don't know if i did them right or not. I would really appreciate if someone would go through the problems and tell me if i got the right results. If i made a mistake

    asked on August 3, 2013
  17. Jefferson

    Nitric acid and zinc react to form zinc nitrate, ammonium nitrate, and water. 4Zn(s) + 10HNO3(aq)→ 4Zn(NO3)2(aq) + NH4NO3(aq) + 3H2O(l) A. How many atoms of zinc react with 1.49g HNO3? B. Calculate the number of grams of zinc that must react with an

    asked on January 7, 2013
  18. math statistics

    IQ scores in the US population have an average of µ = 100 and a standard deviation of σ = 15. Suppose a researcher wanted to test whether socioeconomic status (SES) has an effect on IQ scores. The researcher takes a random sample of n = 100 people,

    asked on January 12, 2019
  19. Physics

    In a simple machine, the energy input is 120j. If the efficiency of the machine is 80%. Calculate the energy output

    asked on March 29, 2017
  20. Math

    In a senior secondary school,80 students play football or hockey.The number that play football is 5 more than twice the number that play hockey.If 15 students play both games and every student in the school plays at least one game,find (i)the number of

    asked on October 2, 2018
  21. databases

    Fernando Cilebra has always ben facinated by skateboards. Fernando has won several contests, both locally and nationally. His interest in skateboards led him to open Fernando's Shop in Denton, Maine. Fernando sells street, trick, and children's

    asked on April 27, 2012
  22. chemistry

    In 1934, Edward A. Doisy of Washington Univeristy extracted 1361 kg og hog ovaries to isolate a few milligrams of a potent female hormone. Doisy burned 5.00 mg of this precious sample in oxygen and found that 14.54 mg of CO2 and 3.97 mg of H2O were

    asked on September 27, 2012
  23. chemistry

    If some of the CaCO3 in the sample had already formed some Ca(HCO3)2, will the volume of CO2(g) generated in the reaction be greater,less than or the same as in the experiment? Explain

    asked on November 2, 2011
  24. chemistry

    A mixture of ALuminum and Zinc weighing 1.67 grams is completely dissolved in hydrochloric acid and 1.750 Liters of hydrogen is produced at 273 Kelvin and 1.0 ATM. can you please help me calculate the mass of Aluminum and Zinc in the Sample?

    asked on November 7, 2010
  25. the parts of speech

    10. In the following sentence, identify the part of speech of the italicized word. Catching fish is one of the oldest pastimes.

    asked on November 14, 2012
  26. Business

    Assignment for week 5 Given the following information, draw the project network. Compute the early, late and slack times for the project network. which activities are on the critical path have only the start or finish of the activity on the critical path?

    asked on December 6, 2010
  27. Analytical chemistry

    A 25 ml sample of household bleach was diluted to 500 ml in a volumetric flask. An unmeasured excess of potassium iodide was aded to a 20 ml aliquot of the diluted sample; the iodine liberated in the reaction: OCl- + 2I- -> I2 + Cl- + H2O required 34.5 ml

    asked on July 30, 2013
  28. math

    a theater seating 300 charges $1 for children $2 for students and $5 for adult half as many adult and children and students areceipt totaled $800 how many children aattend

    asked on September 10, 2011
  29. Math

    Find the slope m, and y-intercept b of the given equation 1. y=5

    asked on October 14, 2007
  30. 2nd grade math

    If you have a rectangle with 24 square units 3 lines down 8 across how can you have a 4 unit rectangle with a perimeter of 8 around the outside also 6 units with a perimeter of 10 in a seprate problem A square of 4, perimeter of 8. What about a 2x2 square?

    asked on May 21, 2007
  31. Chemistry

    when the pressure on 2.5liters of oxygen is decreased from 2.0atm to 1.0atm,the volume of the gas becomes how many liters.(round answer to one decimal place.

    asked on February 12, 2014
  32. corporate finance

    Bunyan Lumber, LLC Closing Case: When should the company harvest the forest? Can you help me get started on this assignment? Bunyan Lumber, LLC, harvests timber and delivers logs to timber mills for sale. The company was founded 70 years ago by Pete

    asked on July 26, 2010
  33. statistics

    How do I sketch distributions? I think I'm doing it wrong. Is there an option my friends stats-calc(her calcultor is very tempremental, so i don't know if it'll work) I can utiilzie that'll sketch things for me? thanks. -Sketch a normal distribution with

    asked on January 30, 2008
  34. Comunity school

    When using fraction strips, how do you know that two fractions are equivalent?

    asked on February 26, 2012
  35. Algebra

    How would you solve the problem - A class wanted to collect 325 cans and on the first week they collected 135 cans, the second week they collected 89 more cans what will they need to collect on week three?

    asked on October 12, 2018
  36. calculus

    A spherical balloon is inflated so that its volume is increasing at the rate of 3.2 ft3/min. How rapidly is the diameter of the balloon increasing when the diameter is 1.1 feet?

    asked on January 25, 2017
  37. Chemistry

    If 5.40 kcal of heat is added to 1.00 kg of water at 100C, how much steam at 100C is produced? sHOW ALL CALCULATIONS LEADING TO AN ANSWER. Q=m*Hf 5.4=m*80 m=5.40/80=0.0675kg

    asked on May 4, 2015
  38. algebra

    A cylindrical oil tank is 2/5 full. If 9 more liters are added, the tank will be 5/8 full. What is the capacity of the tank?

    asked on March 1, 2012
  39. corporate finance

    How does Ben's age affect his decision to get an MBA

    asked on July 26, 2010
  40. chemistry

    The standard solution of FeSCN2+ (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an absorbance of 0.510. If a trial's absorbance is measured to be 0.250 and its initial concentration of SCN¡V was 0.00050 M, the

    asked on April 10, 2008
  41. Chemistry

    please say if molecule is polar or nonpolar: H2 HBr BrCl CS2 H2S

    asked on June 2, 2014
  42. business math

    mary smith purchased a new car for $28,750. she made a 15% down payment and financed the balance at her bank for 3 years. what payments are required at the end of every month, at 18% interest, to pay off the loan?

    asked on December 16, 2013
  43. Analytical chemistry

    What is a pH of 20 mL of 0.08 M NH3 added to 40 mL of 0.04 M HCl? NH3 + HCl = NH4+ + Cl- c(NH3)=(0.02L * 0.08M)/0.06L= 0.02667 M c(HCl)=(0.04L * 0.04M)/0.06L= 0.02667 M c(NH4+)=c(HCl) Kb=[NH4+][OH-]/[NH3] Kb=1.76*10^(-5) So i tried to calculate it like

    asked on September 2, 2013
  44. Physics

    a car that weights 15000 N is initially moving at 60 km/hour when the brakes are applied. The car is brought to a stop at 30 meters. Determine the magnitude of the braking force

    asked on November 14, 2012
  45. physics

    A motorcycle is traveling up one side of a hill and down the other side. The crest of the hill is a circular arc with a radius of 35.5 m. Determine the maximum speed that the cycle can have while moving over the crest without losing contact with the road.

    asked on October 2, 2011
  46. Computerized Accounting

    Consider this statement: "QuickBooks records revenue when an invoice is generated, even though cash has not been received." Is this practice acceptable? Why or why not? What are noncash investing and financing activities, and how are they recorded in

    asked on March 9, 2015
  47. chemistry

    what is the molarity of a solution prepared by dissolving 63.0 g NaF in enough water to make 250.0 mL of solution?

    asked on October 16, 2012
  48. phi103

    need a thesis statement on abortion

    asked on May 5, 2012
  49. Chemistry

    Calculate the equilibrium concentration of all ionic aqueous species in a solution containing 1.30 M HCl and 4.0 M C6H5OH (phenol, Ka=1.6 x 10^-10). What is the pH of the solution?

    asked on April 19, 2008
  50. chem

    How is the process of drying clothes on a clothesline different than drying clothes in a dryer? Thanks. Just more heat in the dryer. It dries quicker because the fast moving hot air will hold more water vapor. thank you

    asked on May 19, 2007
  51. Physics

    A block is attached to a spring and set in motion on a horizontal frictionless surface by pulling the block back a distance 10cm from equilibrium. Now, replace the block with one double the mass and set the block into motion again by pulling the block a

    asked on April 13, 2016
  52. chemistry

    you have a metal tank containing 74.0moles of nitrogen gas at a pressure of 15.0atm.If the pressure is measured at a temperature of 20.0c,then the volume of the tank must be how many liters(Round answer to one decimal place.

    asked on February 12, 2014
  53. calculus

    f(x)= (5x^4 + 5x^3 + 6x^2 + 8x + 5)/(1x^4 + 1x^3 + 1x^2 - 9x + 4) What is the equation of the horizontal asymptote? y = ___? Does the graph of f(x) intersect its horizontal asymptote? (yes or no) If yes, at what x-values does f(x) intersect its horizontal

    asked on June 3, 2012
  54. calculus

    Leave any unneeded answer spaces blank. [Hint: use synthetic division to solve.] f(x) = (1x^3 - 3x^2 - 25x + 75)/(1x^3 - 19x^2 + 118x - 240) the roots of f(x), in increasing order is/are.... ___, ___, ___ f(x) h!@#$%^&s when x is... ___, ___, ___ f(x)has

    asked on June 3, 2012
  55. algebra

    Betty is 6 years older than Deb. 13 years ago, Betty was 4 times older than Deb. How old is Deb?

    asked on April 18, 2012
  56. algebra

    If one runner can run 10 meters in one second and another runner can run 6 meters in one second and the slower runner is given a 70 meter head start, how long will it be before the faster runner catches the slower runner?

    asked on April 15, 2012
  57. 6th grade math

    98.547/4.93 985-493=437 4377-4437=4877 4877-4437=4400 here's where we get stumped the calculator shows we should have a 9 in out answer

    asked on October 17, 2016
  58. Chemistry Help, Please!!!

    The Kw of water varies with temperature. Calculate the pH of water at 46℃ with a Kw=1.219 x 10 to the negative 14th.

    asked on May 8, 2015
  59. Algebra

    you need 3 3/4 yards of material for 1 shirt how many shirts can you make with 116 1/4 yards of material

    asked on September 12, 2014
  60. Analytical chemistry

    A Kjeldahl analysis was preformed upon a 0.055 g sample of impure biguanide (C2H7N5, fw=101.1). The liberated ammonia, collected in 40 mL of 4% boric acid was titrated with 19.51 mL of 0.1060 M HCl. Calculate the percentage of biguanide in the sample.

    asked on August 1, 2013
  61. Calculus

    f(x)= (-5x^3 + 3x^2 + 3x -5)/(-8x^2 +2x + 7) Find the equation of the non-vertical asymptote. y = ? Does f(x) intersect its non-vertical asymptote? (yes or no) If yes, what is the smallest value of x at which f(x) intersects its non-vertical asymptote?

    asked on June 3, 2012
  62. Social Studies

    Explain briefly the people and their culture. 1. Africa 2. Asian 3. South Pacific

    asked on December 7, 2010
  63. Psychology

    In the 3 domains of development, why is it important to consider each domain in the study of adult development?

    asked on November 16, 2010
  64. N/A

    In the domains od development, why is it important to consider each domain in the study of adult development?

    asked on November 16, 2010
  65. physics

    you walk west for 52 m, then you walk 33.2° north of west for 44 m, and finally you walk due north for 25 m. Find the components of your final displacement, from your initial to final point, along the north and west directions.

    asked on May 21, 2015
  66. Accounting

    Consider this statement: "QuickBooks records revenue when an invoice is generated, even though cash has not been received." Is this practice acceptable? Why or why not?

    asked on March 9, 2015
  67. asking for a teacher's opinion

    Do you think rounding borderline letter grades up or down is a fair practice? Or should they just stay where they are? For example, I think that an 89.5% should round up to a 90%. I have one instructor right now who considers an 89.99% to still be a B

    asked on December 6, 2013
  68. math

    a particle moves along the x-axis so that its velocity is proportional to x^2. Prove that its acceleration is proportional to x^3

    asked on June 2, 2013
  69. medical terminologhy

    combining form and suffix to form number 1 abnormal softining of a kidney

    asked on April 20, 2013
  70. math

    In a group of 7 men and 8 women, how many committees of 5 can be selected for which there are 2 men and 3 women? What is the probability of selecting a committee of 5 consisting of 2 men and 3 women?

    asked on June 11, 2012
  71. science

    based on your knowledge of environmentalscience, what could explainthese observation? Support your answer with specific results from your data and ideas fromyour readings

    asked on March 12, 2012
  72. science

    what do recommend to Pinchot as " a sustainable " level of fragmentation that conserves the forest's biodiversity and ecosystem services while still allowing for some development?

    asked on March 12, 2012
  73. MATH

    solve the system of linear equations using the Gauss- Jordan elimination method x1- x2+ 4x3 = 15 x1+ x2 = X3 = 4 -3X1-X2 + X3 = -2

    asked on September 10, 2011
  74. Finance:capital budget

    I am suppose to write a 1400 word paper based on the purchase of three new trucks costing $30,000 each and $10,000 of equipment for each one, with the life expansion of the trucks to be 5 years by calculating the firms' required return using the capital

    asked on July 28, 2011
  75. chemistry

    How many electrons are transferred in the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water?

    asked on April 16, 2008
  76. Chemistry

    The concentration and volume of reagents combined in each trial are listed in the table below: Trial 00020 M 00020 M H2O(mL) Fe(NO3)3(mL) KSCN (mL) 1 5 2 3 2 5 3 2 3 5 4 1 4 5 5 0 Initially (right after combining and before any reaction occurs) the

    asked on April 10, 2008
  77. algebra

    I am supposed to write each logarithmic expression as a single logarithm. I have logbase3of13 + logbase3of3 and my answer is logbase3of39. Can I simplify that any further? also logbase3 of 3 is 1 1+ log3 13 is another answer, simpler, to me. oh, okay, so

    asked on April 12, 2007
  78. history

    Does anyone know any songs that have a history behind them/explain an event in history? (ie Sweet Home Alabama, American Pie) Much thanks! Check these sites for a few songs that have a history and/or explain an event.

    asked on December 28, 2006
  79. math

    Nancy is 4 years younger than Monica. Seven years from now the sum of their ages will be 82. How old are they know?

    asked on September 13, 2017
  80. Math

    If Mary ate two apples and Bob ate three apples, how many apples did Mary eat.

    asked on September 11, 2016
  81. Sociology

    Write a 700- to 1,050-word essay in which you complete the following: Give a brief introduction that identifies the issue you have chosen and why.Describe in three separate paragraphs how each perspective would view or explain the issue.Include in your

    asked on December 6, 2015
  82. Family Dynamics

    One important approach for teachers working with diversity in individual families is to be __________________.

    asked on October 30, 2015
  83. Analytical chemistry

    I did the next problem, i don't have the results for it and i just want to know if i calculated the mass for Fe2O3 the right? A sample is a mixture of iron oxides (Fe2O3 and FeOOH). It's known that at 200°C this reaction occurs: 2FeOOH(s)-> Fe2O3(s) +

    asked on September 7, 2013
  84. Analytical chemistry

    A 5ml portion of table wine was diluted to 100 ml in a volumetric flask. The ethanol in a 20 ml aliquot was distilled into 100 ml of 0.05151M K2Cr2O7. heating completed oxidation of the alcohol to acetic acid: Ch3Ch2OH + 2Cr2O7(2-) +16H(+) -> 3Ch3COOH +

    asked on July 30, 2013
  85. Math

    Three people who work full-time are to work together on a project, but their total time on the project is to be equivalent to that of only one person working full-time. If one of the people is budgeted for one-half of this time to the project and a second

    asked on December 8, 2012
  86. PHI 103

    What kinds of questions and topics are not decided by logical analysis?

    asked on March 27, 2012
  87. science

    do your results support idea that trophic cascades occur in nature?

    asked on March 12, 2012
  88. College Algebra

    I need to find the domain of f, the excluded values of f, the domain of (fg)(x); find (f+g)(-5), (f-g)(x), and (fg)(x) to the problem of: Let f(x)=(7x+1)/(3x+2) and g(x)=6x+5.

    asked on October 16, 2011
  89. Labor Relations

    1. The Local Roofers' Union makes an agreement with management for guaranteed raises each year of no less than 3% of their pay for the next two years in exchange for a reduction in their medical benefits coverage. This is called A. an interest dispute. B.

    asked on August 19, 2011
  90. Life orientation

    In 10-15 lines critically discuss 5 ways in which the human or enviromental problem impact on the community,provide relavant sources to support your claims.

    asked on May 18, 2011
  91. math

    write slope equation for the line that passes though (10,-4) and has a slope of -3/10

    asked on February 15, 2011
  92. Accounting

    Can anyone help me with writing a book report for Accounting. It is due on Tuesday, it can pertain to anything in accounting. TIA

    asked on June 6, 2010

    Identify a viewpoint given in the video that highlights the importance of biodiversity. Do you believe that every species is connected to one another as expressed in the video? Why or why not?

    asked on January 19, 2010

    can anyone describe to me what this is pls? also can anyone pls explain how dna manipulation works and what it does pls?

    asked on April 1, 2009
  95. Geometry

    Write an equation of the line in slope-intercept form with the given slope and the given point F(-4,1), m=3/4

    asked on October 14, 2007
  96. Math

    How do i solve this -given that p and q are sets of real numbers such that p=(x:0 is lesser than or equal to x is lesser than or equal to 3)and q=(x:3 is lesser than x is lesser than 2),find p union q

    asked on October 2, 2018
  97. Math

    The sixth term of an appointment is 37 and the sum of the first sixth term is147 find the first term,find the sum of the first fifteen terms.

    asked on August 24, 2017
  98. Chemistry

    At 3745°C, K = 0.093 for the following reaction. N2(g) + O2(g) equilibrium reaction arrow 2 NO(g) Calculate the concentrations of all species at equilibrium for each of the following cases. (a) 2.0 g N2 and 3.0 g O2 are mixed in a 1.3-L flask. [N2] [O2]

    asked on February 27, 2017
  99. calculus

    Use implicit differentiation to find an equation of the tangent line to the curve 3xy^3+4xy=63 at the point (9,1)(9,1).

    asked on January 25, 2017
  100. explore career

    If john got paid $12.00 an hour and he worked 40 hours, how much is his gross pay?

    asked on December 15, 2016


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