Popular questions and responses by Marissa
  1. College Chemistry

    Balance this equations for redox reactions in basic solution. Fe(OH)3(s) + OCl- ¨ FeO42- + Cl-

    asked on September 23, 2010
  2. Home economics

    List 10 careers in home economics

    asked on September 25, 2016
  3. Chemistry

    three different liquids are used in a manometer. (a) derive an expression for P1-P2 in terms of ro(a), ro(b), ro(c), h1, and h2 (b) suppose fluid A is methanol, B is water, and C is a manometer fluid with a specific gravity of 1.37; pressure P2=121.0 kPa;

    asked on November 7, 2010
  4. English

    Identify the sentence that is punctuated correctly. Question 32 options: a) Social issues involving computers and society are, privacy, unemployment and technological complexity. b) Social issues involving computers and society are privacy, unemployment,

    asked on January 27, 2020
  5. fibers and fabrics

    Which one of the following is the most complete and accurate definition of fiber? A. A stringy substance from plants B. The hair of an animal C. Man-made threads and yarns D. Basic raw material from which fabric is made 2. An example of a natural fiber is

    asked on December 2, 2009
  6. Chem

    Which one of the compond are covalent HF RbF LiF NaF

    asked on September 21, 2016
  7. English

    Identify the correct sentence. Question 32 options: a) Not far from the studio is an Italian restaurant, a gas station, and a park that has a running path. b) Not far from the studio are an Italian restaurant, a gas station, and a park that has a running

    asked on January 28, 2020
  8. Chemistry

    Consider the reaction 2H2O(g) → 2H2(g) + O2(g) ΔH = +483.60 kJ/mol at a certain temperature. If the increase in volume is 42.7 L against an external pressure of 1.00 atm, calculate ΔU for this reaction. (The conversion factor is 1 L · atm = 101.3 J.)

    asked on October 3, 2018
  9. dressmaking

    Mrs. Shotto was once one of your regular customers, but she hasn't asked to have any garments made in approximately one year. You note she has lost weight. She would like you to make her a special silk blouse to replace a favorite blouse that has worn out.

    asked on December 2, 2009
  10. Physics

    while on the moon, the Apollo astronauts enjoyed the effect of a gravity much smaller than that on earth. if Neil Armstrong jumped up on the moon with an initial speed of 1.51 m/s to a height of 0.700m, what amount of gravitational acceleration did he

    asked on February 3, 2011
  11. Organic Chemistry

    How would you expect the following series of compounds to compare in behavior for SN1 vs SN2? CH3CH=CHCH2Br CH3CH2CH2Br CH3C(-Br)=CHCH3 on the last one, Br is a substituent of the C and that C is double bonded to CHCH3 Please help! Even if someone could

    asked on November 26, 2008
  12. algebra

    1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 a.143 b.136 c.140 d.133 an=a1+(n-1)d a20=3+(20-1)7 a20=3+(19)7 a20=3+133 answer=b 2)Write an equation for the nth term of the arithmetic sequence -3,3,9,15...

    asked on August 26, 2007
  13. English

    Which of the following is not true? Question 30 options: a) Always capitalize specific brand names. b) Capitalize names of specific places. c) Capitalize common nouns. d) Capitalize proper nouns. c.

    asked on January 27, 2020
  14. Physics - Electric Field

    Find the electric field at a point midway between 2 charges of +40.0e-9 C and +60.0E-9 C separated by a distance of 30.0 cm. My work: q1=40E-9 q2=60e-9

    asked on March 23, 2015
  15. Chemistry, acids and bases

    (a) Find pH and pOH of 1.0 M solution of sodium benzoate, NaC6H5COO. (Ka of benzoic acid is 6.2x10^-5) (b) Calculate pH after 0.205 moles per liter of HCl was added (assume volume does not change (c) Calculate pH after 1.0 moles per liter of HCl was added

    asked on May 6, 2008
  16. english

    Which type of faulty logic appears in this sentence? Dr. Bishop has never performed a surgery before, so he must not be equipped to be a good surgeon.

    asked on April 25, 2016
  17. Chemistry

    At 20 degrees celcius the vapor pressure of toluene is 22 mmhg and that of benzene is 75 mmhg. Assume an ideal solution, equimolar in benzene and toluene. At 20 degrees celcius what is the mole fraction of benzene in the vapor in equilibrium with this

    asked on April 7, 2015
  18. Math

    What number is 1,000,000 greater than 337,676

    asked on August 26, 2014
  19. Chemistry

    Your space ship has docked at a space station above Mars. The temperature inside the space station is 24oC at a pressure of 745mmHg. A balloon with a volume of 425mL drifts into the airlock where the temperature is -95oC and the pressure is 0.115 atm. What

    asked on November 14, 2013
  20. algebra

    1)Write an equation for the parabola whose vertex is at (-8,4) and passes through (-6,-2) answer=y=-3/2(x+8)^2+4 2)Solve x^2>_2x+24 answer=x_6 #1, ok #2, ok

    asked on August 14, 2007
  21. Algebra

    State the possible number of imaginary zeros of g(x)= x^4+3x^3+7x^2-6x-13 this is how far Ive gotten:there are 4 zeros,3 positive and 1 negative If you've found four real zeroes, then there are no imaginary zeroes. You can also see that there are no

    asked on August 10, 2007
  22. Chemistry

    Potassium permanganate, KMnO4, a common oxidizing agent, is made from various ores that contain manganese (IV) oxide, MnO2. The equation shows the net reaction for one process that forms potassium permanganate 2MnO2+2KOH+O2=2KMnO4+H2 What is the maximum

    asked on November 15, 2016
  23. physics

    Two canoeists start paddling at the same time and head toward a small island in a lake. Canoeist 1 paddles with a speed of 1.40m/s at an angle of 45 degrees north of east. Canoeist 2 starts on the opposite shore of the lake, a distance of 1.5 km due east

    asked on September 24, 2014
  24. ap biology

    What barriers might hinder the acquisition of plasmids?

    asked on April 8, 2014
  25. Physics

    The lower frequency limit for human hearing is usually considered to be 20.0 Hz. (a) What is the speed of sound in m/s if the air temperature is 20.0ºC? (b) What is the corresponding wavelength for this frequency?

    asked on October 8, 2013
  26. Math

    Write each rate as a fraction in lowest terms 15 feet in 30 seconds

    asked on August 27, 2019
  27. Chemistry

    When coal is burned, the sulfur it contains is converted into sulfur dioxide. This is SO2 is a serious pollutant, so it needs to be removed before it escapes from the stack of a coal fired plant. One way to remove the SO2 is to add limestone, which

    asked on November 15, 2016
  28. chemistry

    An equilibrium is dynamic. true or false

    asked on December 17, 2014
  29. geometry

    One endpoint and the midpoint of a segment are given. Find the coordinates of the other endpoint. Show all your work. A. Endpoint: (-1,9) Midpoint: (-9,-10) Endpoint: _______ B. Endpoint: (9,-10) Midpoint: (4,8) Endpoint: ________

    asked on September 11, 2014
  30. Accounting

    During the week ended May 15, 2013, Scott Fairchild worked 40 hours. His regular hourly rate is $31. Assume that his earnings are subject to social security tax at a rate of 6.20 percent and Medicare tax at a rate of 1.45 percent. He also has deductions of

    asked on April 15, 2014
  31. Physics

    A man at point A directs his rowboat due north toward point B, straight across a river of width 100 m. The river current is due east. The man starts across, rowing steadily at 2.50 m/s and reaches the other side of the river at point C, 150 m downstream

    asked on February 2, 2014
  32. math

    The greatest common factor of 2 numbers is 14, the least common multiple is 168. If the 2 numbers are not 14 and 168, what is the sum?

    asked on May 13, 2013
  33. Physics- Exercise 10

    A 500kg pig is standing at the top of a muddy hill on a rainy day. the hill is 100.0m long with a vertical drop of 30.0m. the pig slips and begins to slidedown the hill. What is the pig's speed at the bottom of the hill? Use the Law of conservation of

    asked on February 3, 2011
  34. algebra

    how many quarts of pineapple juice should Theo add to a 20% pineapple drink to create 5 quarts of a 50% pineapple juice mixture?

    asked on October 20, 2009
  35. Math

    Have to do an enlargement project and enlarge an everyday item by 10 times it original size. Part of grade is level of difficulty so do not want to do something simple. Older sister did a lego piece. Need some good ideas on a item and am stumped!

    asked on March 6, 2009
  36. math

    1)The area A of a triangle varies jointly as the lengths of its base b and height h. If A is 75 when b=15 and h=10,find A when b=8 and h=6 2)Determine the equation of any vertical asymtotes of the graph of f(x)=2x+3/x^2+2x-3 1) Area of a triangle is 1/2

    asked on August 21, 2007
  37. Psychology

    Recent research found that vulnerable youth who participate in positive extracurricular activities in high school were more likely than non participants to

    asked on December 12, 2019
  38. Trigonometry

    A scientist has 37 grams of a radioactive substance that decays exponentially. Assuming k=-0.3,how many grams of radioactive substance remain after 9 days.

    asked on April 13, 2018
  39. Chemistry

    How many moles of water vapor react to yield 546.234 moles of hydrogen?

    asked on November 17, 2016
  40. Chemistry

    Write a conversion factor that could be used to convert between moles of methane and moles of hydrogen

    asked on November 17, 2016
  41. Chemistry

    What is the maximum mass of cobalt (II) phosphate that will precipitate from a solution prepared by adding an excess of K3PO4 solution to 100.0 mL of 5.0 M CoCI2? Sorry for all the confusion with different names we are working in a group and its easier to

    asked on November 16, 2016
  42. Chemistry

    A precipitation reaction takes place when a water solution of potassium phosphate, K3PO4, is added to a water solution of cobalt (II) chloride, CoCl2 Write a balanced equation for this reaction

    asked on November 15, 2016
  43. Chemistry

    Potassium permanganate, KMnO4, a common oxidizing agent, is made from various ores that contain manganese (IV) oxide, MnO2. The equation shows the net reaction for one process that forms potassium permanganate 2MnO2+2KOH+O2=2KMnO4+H2 Explain why the oxygen

    asked on November 15, 2016
  44. calculus

    what are the inflection points of 5x^2-45/x^2-25

    asked on November 23, 2015
  45. Chem

    Can someone help with this one? Half life of 55Cr is about 2 hours. A sample of the isotopes delivered from the reactor to lab requires 12 hours. What is the minimum amount of material that should be shipped to get 1.0 mg of 55Cr. I said 32mg but I got it

    asked on April 23, 2015
  46. Chemistry

    24.0 mL of a 2.4 M silver nitrate is mixed with 32.0 mL of 2.0 M sodium. Calculate the mass of precipitae formed. Calculate the concentration of all ions remaining in solution after the precipitate forms. I don't know how to start this or where to go with

    asked on April 7, 2015
  47. math

    A support wire runs from the top of a tower to the ground. If the tower is 1200 feet tall and the wire is attached to the ground 500 feet away from the tower, how long is the support wire?

    asked on November 20, 2013
  48. math

    jimmy is playing a dart game at an arcade. he can earn 2,3,or 6 points with each dart. she scored 24 points. how many ways could he score 24 points given that each dart thrown landed on the dart board?

    asked on May 22, 2013
  49. math

    Rohnda is in charge of buying food for the school picnic, she found that hot dogs are in packages of 24, buns in packages of 18, ketchup in boxes of 12, and mustard in boxes of 15. what is the least number of students that can be feed if each student

    asked on May 13, 2013
  50. physics

    a football punter accelerates from rest to a speed of 8 m/s during the time in which his toe is in contact with the ball (about 0.21 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?

    asked on November 20, 2011
  51. Spanish 8th grade

    I have to read this and answer these questions for homeowrk-I'm not sure if I did this correctly. Could you please check-I put the reading and then questions and my answers under it-thank uyou for checking-I'm really not sure about my answers-I'm a little

    asked on October 12, 2011
  52. Math- Calculus

    Let f be a function such that f(-1)=3 and f'(-1)=6 let h(x)=x^5f(x) evaluate h'(x) at x=-1

    asked on April 19, 2011
  53. math

    If the true population standard deviation was known to be 3.0, then approximately what minimum sample size would you need in a simple random sample if you want a 95% confidence interval for the mean to have a margin of error of .5 or less?

    asked on April 14, 2011
  54. math

    Find a polynomial f(x) with leading coefficient 1 and having the given degree and zeros. Each polynomial should be expanded from factored form, simplified and written in descending order of exponents on the variable. For example: (x+5)(x-2) should be given

    asked on April 12, 2011
  55. Chemistry

    Based on the balanced equation, C2H4 + 3O2 → 2CO2 + 2H2O calculate the molecules of H2O formed when 135 molecules of O2 are reacted.

    asked on November 7, 2010
  56. Social studies

    What were the economic, political, and social aspects of New Netherland, New Spain and New France?

    asked on October 17, 2010
  57. english

    what are the literary devices in the song " if today was your last day" by nickelback?

    asked on February 15, 2010
  58. physics

    when Chris slams a basketball he has a vertical leap of 1.46 meters. what must his initial vertical velocity be in order for him to reach this height?

    asked on December 9, 2010
  59. Physics

    OK, so I'm having some serious problems with this one question. It's on relativity. Here it is: Calculate the mass of a proton (m0 = 1.67E-27 kg) whose kinetic energy is one sixth its total energy. How fast is it traveling? THANKS!!

    asked on April 19, 2009
  60. Physics

    So I'm having some trouble with this problem.. Is there an equation or is it just a ratio? I'm having so many problems with this one! THANKS! What is the minimum thickness of coating which should be placed on a lens in order to minimize reflection of 531

    asked on April 7, 2009
  61. Chemistry, reactions w/ water

    Write the equation for the reaction of each of the following with water. a) HCl b) CH3COOH c) NaOH d) NH3 Are these correct? a. HCl (aq) + H2O (l) --> H3O+ (aq) + Cl- (aq) b. CH3COOH (aq) + H2O (l) --> CH3COO- (aq) + H3O+ (aq) c. NaOH (aq) + H2O (l) -->

    asked on May 6, 2008
  62. chemistry

    ammonia, NH3, is a typical ingrediant in household cleaners. it is produced through a combination reaction involcing N2(g) and H2(g). if 12.0 mol of H2(g) react with excess N2(g), how many moles of ammonia are produced?

    asked on April 9, 2008
  63. algebra

    1)Write an equation for an ellipse if the endpoints of the major axis are at(1,6)and (1,-6)and the endpoints of the minor axis are at (5,0)and (-3,0) answer= (x-1)^2/36+y^2/16=1 2)Which is the equation of an ellipse with center (-4,2)and a horizontal major

    asked on August 20, 2007
  64. Algebra

    1)Find the exact solutions to 3x^2=5x-1 using the quadratic formula. answer=5 plus or minus the square root of 37 over 6 2)Use the discriminant to determine the number and type of roots for the equation 2x^2-7x+9=0 answer=2 complex 3)Identify the

    asked on August 12, 2007
  65. Algebra

    Can someone please explain how to do these problems. 1)write a polynomial function of least degree with intregal coefficients whose zeros include 4 and 2i. 2)list all of the possible rational zeros of f(x)= 3x^3-2x^2+7x+6. 3)Find all of the rational zeros

    asked on August 10, 2007
  66. Algebra 1

    In the formula A=P(1+r) t , p is the principle, r is the annual rate , A is the amount of years . An account waning 4% has a principal of $500000 . If no more deposits or withdrawals are made. ABOUT how much money will be in the account after 5 years

    asked on March 5, 2020
  67. Math

    The sales tax rate for the state of Washington was 8.3%. What is the state sales tax on a $4,300 car in Washington? What is the final cost of the car, including tax?

    asked on August 27, 2019
  68. Calculus

    Find a formula for a function of the form y=bxe−ax with local maximum at (0.5,0.3679). y=

    asked on October 11, 2018
  69. Math

    Start at 500,crate a pattern that subtracts 4 from each number.Stop when you have 5 numbers

    asked on October 8, 2018
  70. History

    The growing popularity of newspapers, magazines, and books in the United States during the 19th century contributed to which of these? The emergence of a uniquely American literary style The expansion of educational opportunities for women and minorities

    asked on April 3, 2017
  71. math

    The position of a bucket falling down a well can be represented by the function h(t)=-16t^{2} where t is time in seconds and h(t) is measured in feet. Based on this function, what is the velocity of the bucket after it has fallen for 4 seconds?

    asked on February 27, 2017
  72. Chemistry

    Write the symbol for the elements that fit the following descriptions 1. 10 electrons in each -3 ion 2. 18 electrons in each +2 ion 3. The alkaline earth metal in the third period

    asked on January 18, 2017
  73. Calculus

    A rectangular tank with a square​ base, an open​ top, and a volume of 4,000 ft cubed is to be constructed of sheet steel. Find the dimensions of the tank that has the minimum surface area. I'm not understanding how to get started and find the

    asked on December 5, 2016
  74. Chemistry

    How many moles of hydrogen from when 10 moles of methane react completely?

    asked on November 17, 2016
  75. Chemistry

    Calculate molarity of KNO3 solution if 69 g of salt are dissolved into 250 mL of solution

    asked on March 17, 2016
  76. Science

    A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?

    asked on December 6, 2015
  77. Science

    A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?

    asked on December 6, 2015
  78. Science

    A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?

    asked on December 6, 2015
  79. Geometry

    Given: BA is congruent to DC; BE is perpendicular to AC; DF is perpendicular to AC. Prove: BE is congruent to DF. The image is of rhombus ABCD. There is a segment connecting A and C with points E and F each about a third of the way into the segment.

    asked on November 10, 2015
  80. Math

    A recipe calls for 2/3 cups chocolate but I'm only making a fourth of the batch how much chocolate what I need

    asked on October 8, 2015
  81. living skill

    Calculating Voltage across a Resistor (Parallel Circuit and series circuit)

    asked on October 6, 2015
  82. MATH

    Use the following time value of money tables to answer the following questions. Assume that the annual rate of interest is 6% for each of the four following problems. i = 6% Time Periods (n) Future Value of 1 Present Value of 1 Future Value of an Annuity

    asked on September 26, 2015
  83. math

    find the percentile rank of 4.6 out of these numbers: 1.8, 2.5, 3.9, 4.6, 4.7, 4.8, 4.8, 4.9

    asked on September 23, 2015
  84. physics

    A man cleaning his apartment pushes a vacuum cleaner with a force of magnitude 55.8 N. The force makes an angle of 15.3 ◦ with the horizontal floor. The vacuum cleaner is pushed 3.55 m to the right along the floor. Calculate the work done by the 55.8 N

    asked on July 24, 2015
  85. English

    Would someone be willing to proof read my English essay? I proof read it but I don't know if I got all the mistakes.

    asked on June 4, 2015
  86. Ap chem

    How would the addition of hydrogen gas at constant temperature and volume effect rate=k[h2][I2]?

    asked on April 23, 2015
  87. Chem

    What is the order of rate = k[NO]2[Br2]. 2nd order?

    asked on April 23, 2015
  88. Chem

    What would the unit be if you calculate the rate when A= 0.30 M and b= 0.30 M. I have the calculation done right and its 1.57 x 10 to the -3 but I don't know the unit

    asked on April 23, 2015
  89. Chemistry

    Does a k constant have a unit?

    asked on April 23, 2015
  90. chemistry

    16.5 mL of 2.5 M sodium sulfate is mixed with 35.5 mL of 4.5 M sodium nitrate. What is the concentration of all ions in the new solution?

    asked on April 7, 2015
  91. Math 222

    I am having difficulties trying to do rational expressions. I have to use the words Domain, Excluded Value, Set, Factor, and Real Numbers to show how I got the answer. Can someone please help me solve this one? g^2-6g-55 ___________ g

    asked on February 19, 2015
  92. Physics

    A baseball player slides into third base with an initial speed of 3.8m/s. If the coefficient of kinetic friction between the player and the ground is 0.40, how far does the player slide before coming to rest?

    asked on February 11, 2015
  93. Mechanics, Rigid body

    At t = 0 s a flywheel is rotating at 20 rpm. A motor gives it a constant acceleration of 1 rad/s^2 until it reaches 100 rpm. The motor is then disconnected. How many revolutions are completed at t = 21 s? What I've done so far is multiply my 20rpm and

    asked on December 14, 2014
  94. History

    What did the founding fathers of the United States create in order to ensure that one person did not ever have too much power in the government?

    asked on May 29, 2014
  95. science

    if you wanted to consult the geologic time scale for when the first vertebrates evolved, where would you look?

    asked on April 17, 2014
  96. Social Studies

    What were the negative impact or effects of the Incas and Aztecs? Thank You

    asked on April 10, 2014
  97. Social Studies

    Has the effort of Westerners to aid the rest of the world done more good than harm? Its a opinon but i would like a answer please. Please make your answer at least 6 sentences. Thank you very much

    asked on April 8, 2014
  98. algebra

    . Mrs. Crenshaw has confiscated 4 cell phones from 4 different students because they used them during class. To get the cell phones back, they have to answer the fol- lowing question: What is the probability that no student receives his or her own phone if

    asked on March 10, 2014
  99. Statistics

    I have 8 marbles: 3 blue, 1 green, 4v reds. What is the probability of selecting a blue marble twice with replacement and twice without replacement

    asked on March 8, 2014
  100. algebra

    There is an 18 inch sandwhich that Jenny cuts and gives half of the sandwhich to Demi and Joel gets 3/4 of what jenny has. Add all up to 18

    asked on March 5, 2014


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