Posts by miranda

Total # Posts: 296

  1. Chem

    Please someone Help!! Acetic acid, CH3COOH, is a weak organic acid, pKa 4.47. Determine the position of the equilibrium for the reaction of acetic acid with NaHCO3, and draw the species that predominates at equilibrium.
  2. chemistry

    For the exothermic reaction PCl3(g)+Cl2(g)?PCl5(g) K = 0.160 at a certain temperature. A flask is charged with 0.507 bar PCl3 , 0.507 bar Cl2, and 0.304 bar PCl5 at this temperature. What are the equilibrium partial pressures of PCl3 , Cl2, and PCl5, respectively?
  3. Chemistry

    Describe how to make 20 mL of a 6.0 % solution from a stock solution with a concentration of 10 %.
  4. Math

    Valentina purchased 200 beads for $48 if she needs to buy 25 more beads how much will she pay if charged the same rate
  5. algebra

    Peter has 800 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed area. What is the maximum? area?
  6. Economic

    its not A I know that for a fact
  7. Chemistry

    How many grams of KI must be added to a 250-ml volumetric flask to prepare a water solution that is 0.100 M in potassium iodide?
  8. Chemistry

    Write the formulas of the compounds formed by NH4+ with the following anions: CN?, HCO3?, SO42?, HPO42?
  9. Algebra

    factor the following quadratic expressions, if possible. k^2-12k+20 6x^2 + 17x - 14
  10. Math

    The dressmaker has 3/8 yard of fabric. She needs a total of 3/4 yard for a vest. How much more fabric does she need?
  11. science (ASAP)

    thanks :)
  12. science (ASAP)

    identify the terms or phrases that are paired together correctly a. deserts and dwarf trees b. temperate and deciduous forest and evergreen trees c. subarctic taiga and moss d. tundra and permafrost ***
  13. social studies

    thanks
  14. social studies

    my answer is d
  15. social studies

    (PLEASE HELP) from where did Islam spread? a. from India to Arabia b. From the persain empire to the arab emirates c. from macedonia with alexander the great d. from mecca and medina through arabia
  16. science (ASAP)

    what does the notation TT mean to genetics
  17. math

    plss help equation for this statement the distance D travelled by a car varies directly as its speed s
  18. ELA

    b and b?
  19. ELA

    "The Enlightenment and the Scientific Revolution were twin explosions in thinking that made the 17th and 18th centuries one of the most exciting and dynamic eras in European history. People cam to believe the power of human reason apart from the guidance of religion. ...
  20. Physics

    you toss a racquetball directly upward and then catch it at the same height you released it 1.90 s later. Assume air resistance is negligible.What is the acceleration of the ball while it is moving upward?What is the acceleration of the ball while it is moving downward?What is...
  21. math help

    Question 1: Robby wants a secured loan to start his own business. Robby will use his house as collateral. The bank will loan Robby 56.4% of his house's equity. Robby's house is worth $367 685. He owes $108 653 on it. What is the equity in Robby's house? Question 2...
  22. Math (Grade 12)

    Question 1: Robby wants a secured loan to start his own business. Robby will use his house as collateral. The bank will loan Robby 56.4% of his house's equity. Robby's house is worth $367 685. He owes $108 653 on it. What is the equity in Robby's house? Question 2...
  23. social studies hurry

    BADA 100%
  24. Social Study'S

    The increasing of cotton is helpful because the cotton is really soft so it works for the winter.
  25. math

    Lucy's employer pays 70% of the total cost of her family's health insurance plan, while Lucy pays the rest. If the total cost of the plan will increase from $450 per month to $650 per month, how much more will Lucy have to pay each month?
  26. math

    Find two mixed numbers that up to 16 but have a difference of 5???
  27. math

    find all solutions in the interval [0,360degrees) sin(5x)=0
  28. Physical Education 1-10

    THANK YOU @LizLiz 100%
  29. Chemistry

    Calculate the standard enthalpy change for the reaction 2A+B⇌2C+2D Use the following data: Substance ΔH∘f (kJ/mol) A -251 B -403 C 213 D -511 My thoughts: [(2)(-511)+(213)(2)]-[(2)(-251)+(-403)]=309kJ (but apparently that is not the correct answer) What did I ...
  30. Trigonometry

    two pulleys of a car engine radius of 8 cm and 5 cm respectively are connected by a belt. The larger pulley rotates 80 times per minute. Find the angular velocity of each pulley in radians per minute.
  31. help please english

    The CORRECT answers are 1.) A 2.) C 3.) B 4.) B 5.) A 6.) B 7.) (essay) 8.) B 9.) D 10.) A 11.) B 12.) B 13.) A I just took the quiz and i got 12/12
  32. Geometry

    You know the perimeter is 21 and, it's equilateral. Which means all sides are equal so therefor 21 divided by 3 = 7.
  33. Chemistry

    Underground miners formerly used headlamps in which calcium carbide (CaC2) was reacted with water to form acetylene (C2H2) gas as shown in the following reaction: CaC2(s) + H2O (l) ---> C2H2 (g) +Ca(OH2)(s) The acetylene produced was then burned to produce a very bright ...
  34. ENGLISH

    African slaughter ritual should be allowed in suburbs
  35. geometry

    figure of kite top pointed left. Tail is point E. Segment from AB perpendicular to CD. Top side of kite is AC, bottom side is CB. I figured it ==== AC 9y-6 = 7y; I got 3 for y. So, C = 21; for (x) I got 5x+18=5x + 15 (x) = 3. So AD IS 9. AE is 5x+6y= 15+18. So AE is 33. Did I ...
  36. geometry

    I tired but answers don't make since. Problem is segment CD is perpendicular bisector of segment AB. Need to find lengths of AC (9y-6), AD (3x), and AE ((5x +6). Others: BE=(5x+ y), BD (x + 10) and CB (7y). Figure like a kite. HELPPPPPPPPPP.
  37. geometry

    I tried to figure this problem out, Did I do it correct? m<XWY = 2x+5, m<YWZ = 5x-79, m<XWZ = 122 degrees. m<XWZ = ? I got 28. (2x+5)+ (5x-79 = 122 degrees. 7x = 196 = 28. Did I do It right?
  38. Chemistry

    The thermochemical equation which is associated with ∆H°f, the standard enthalpy of formation, for urea, CO(NH2)2 (s), is: CO (g) + 2NH3 (g) --> CO(NH2)2 (s) + H2 (g) CO (g) + 2H2 (g) + N2 (g) --> CO(NH2)2 (s) C (s) + O (g) + N2 (g) + 2H2 (g) --> CO(NH2)2 (s...
  39. math

    which mixture is more blue? 4gallons primer over 8 gallons paint or 3 gallons primer over 5 gallons paint
  40. English

    encompassed physical and emotional needs
  41. art

    @ Mac number 6 is B
  42. Science

    @someone helpful its actually #5
  43. Math

    @ ANNA IS WRONG , btw Anna's answers were the same as yours, so don't go around saying people are wrong when they have the same answers as you
  44. science

    2. is meiosis
  45. math

    Thank you ms.sue
  46. math

    at 1:00
  47. math

    4 hours at 2:00
  48. math

    I can multiply 12 by 20 and get 240, is that correct
  49. math

    Clark is cooking a 12 pound ham. The ham needs to be cook 20 minutes for each pound. Clark wants to serve the ham at 5 p.m. What is the latest time he should place the ham in the oven.
  50. math

    Riley wants to raise $2550 for a fundraiser walk. He needs to ask people to pledge money for each mile that he walks. How many people will he need to get pledges from in order to reach his goal.
  51. math

    82 71 60 49 38
  52. math

    82, 71, 60, 45, 30
  53. math

    Complete the pattern 82,71,60,?,?
  54. math

    4, 13, 22, 31, 40
  55. math

    Complete the pattern 4,13,22,?, ?
  56. math

    Juanita gets on a train at 12:05 p.m. for a 576 miles trip. Her train travels the entire distance at an average speed of 72 miles per hour. A t what time does she arrive at her final destination.
  57. math

    you are ordering pizza for a party. One pizza serves 8 people. You are expect that there be 35 people. How many pizzas should you order.
  58. chemistry

    A 14.0 kg sample of lead is measured out at 4 degrees celcius what is the specific gravity of lead?
  59. math

    which numbers should you add to estimate the answer to this problem: 87,087 + 98.000 - 88,000+ 98,000 -85,000+95,000 - 87,000 +98,000 - 80,000+ 90,000 thanks for your help!
  60. Math

    A factory produces fuses, which are packaged in boxes of 16. Three fuses are selected at random from each box for inspection. The box is rejected if at least one of the three fuses is defective. What is the probability that a box containing six defective fuses will be rejected?
  61. Philosophy

    1. d
  62. Math

    Mr. Sue you were wrong and i got that question wrong.
  63. chemistry

    What is the percent yield of NaCl if 31.0 g of CuCl2 reacts with excess NaNO3 to produce 21.2 g of NaCl?
  64. Algebra

    Gustav’s father is seven times as old as he is. A year ago, he was nine times as old as Gustav. Find Gustav’s present age.
  65. Math

    2/8 and 4/12
  66. Math

    Marcus makes a punch that is 1/4 cranberry juice which two fractions are equivalent to 1/4
  67. 7th grade English

    Is it themselves
  68. 7th grade English

    Ok one more I need to ask you. The Great Lakes (they, themselves) are Babe's drinking water.
  69. 7th grade English

    Use the correct pronoun in parentheses. The book ( it, itself) is a collector's item. Please help. Thanks.
  70. science help plzzz

    BBDBC 100% CORRECT!!!!!!!!!
  71. physics

    If my kinetic coefficient and static coefficient are both 1.02, how can I explain why they are the same???? (For a horizontal surface)
  72. Physics

    If the gravitational force between objects of equal mass is 2.30x10^-8 N when the objects are 10.0m apart, what is the mass of each object?
  73. chemistry

    Actually I solved it - and just to clarify what Dr. bob was doing: dHrxn = (n*dH SO3) - (n*dH SO2) where n is equal to 2 based on the stoichiometric equation 2SO2 + O2 ==> 2SO3 Indeed, Find dHf SO3 and dHf SO2 in tables in your text or notes. Then, the number of moles of ...
  74. Chem

    Dr. Bob, I don't think this is the answer. It's close, but I think there is another step. Could you elaborate on your answer to make it more clear?
  75. Physics

    A ball rolling down a hill was displaced at 19.6m while uniformly accelerating from rest. If the final velocity was 5.00 m/s what was the rate of acceptation?
  76. Physics

    A projectile is fired off a 35m cliff at 18m/s. what horizontal distance does the projectile travel before hitting the ground?
  77. Physics

    a rubber ball is thrown downwards off a balcony. after it travels 55m it has a speed of 46.5m/s. what is the initial velocity
  78. chemistry lab

    obtaining a smaller amount of sio2 than was present in the original sample
  79. chemistry lab

    list the possible manipulation errors that might contribute in obtaining a significantly larger amount of nacl than was present in original sample
  80. Math

    I really don't know the answer?
  81. Science - physics

    Ms. Sue I hear you are good with these problems could you be of assistance for this one? Thank you!
  82. Science - physics

    Imagine you need to deliver a piano over three steps. A longer ramp translates into less force necessary to raise the piano's height than a shorter ramp would require. Calculate the percentage smaller a force would be required using an 2.8m long ramp compared to a 0.9m ramp?
  83. American Goverment

    Despite their differences, the Founding Fathers all agreed that _____. democracy was the most important political value the Constitution should balance order, liberty, and popular sovereignty freedom must be protected at all costs a monarchy should be established to ensure orde
  84. American Goverment

    Philadelphia, Pennsylvania was NOT _____. the location the 1787 Constitutional Convention. the city where the Declaration of Independence was signed the childhood home of Thomas Jefferson and John Adams an important city in colonial America 22. For the first eleven years of ...
  85. chemistry

    The H3o+ concentration of a solution is found to e 3.40*10^-6. What is the pH of the solution? what is the H3O+ concentration? what is the OH- concentration? is this and acidor a base?
  86. chemistry

    If 37.0 mL of HCl is used to neutralize 25.0 mL of 0.09345M LiOH. What is the concentration of the acid
  87. chemistry

    If 37.0 mL of HCl is used to neutralize 25.0 mL of 0.09345M LiOH. What is the concentration of the acid
  88. chemistry

    If 7.50 mL of 0.100M HCl is mixed with 12.5mL of NaOH. What is the concentration of the base
  89. math

    I just need help
  90. Science

    300 mm Hg
  91. Physical sciences

    What is the universal law?
  92. poetry

    What is the authors tone in the poem arithmetic?
  93. math

    the product of 16 and c is increased by 6 to equal the qoutient 25 and 9. what is c?
  94. physics

    A collision occurs between two pucks on an air-hockey table. Puck A has a mass of 0.020 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.040 kg and is initially at rest. The collision is not head-on. After ...
  95. Physics

    A 4.90-kg ball, moving to the right at a velocity of +2.50 m/s on a frictionless table, collides head-on with a stationary 8.00-kg ball. Find the final velocities of the balls if the collision meet the following conditions. (a) elastic 4.9-kg ball = 8-kg ball = (b) completely ...
  96. Algebra 1

    thank you!!
  97. Algebra 1

    ignore the w= l + 6= < 36!!
  98. Algebra 1

    Okay one last one that I've spent all night truing to figue out. 2. The width of a rectangle is 6 cm longer than its length. Its perimeter is more than 36 cm. Let l equal the length of the rectangle. a. for the width in terms of the length. W= l + 6= <36 b. Write an ...
  99. Algebra 1

    So as I was doing me hw, I ran into this question, and I cant figure it out... Anyone wanna try? 7. The ratio of the perimeters of two triangles is 2:5. The perimeter of the larger triangle is 20 cm. What is the perimeter of the smaller triangle?
  100. Algebra 1

    Okay. So I am completely lost with this... Any help would be great! 3. Solve the system using any method – graphing, substitution, or linear combination. Make sure to show your work. 2x + 5y= 8 x + 3y= 2
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