Popular questions and responses by Jonah
  1. Chemistry

    If acetic acid is the only acid that vinegar contains [Ka = 1.8*10-5] , calculate the concentration of acetic acid in the vinegar. pH of vinegar is 3.20 _______________ First I got the antilog of the pH given, which turned out to be 6.309E-4. Then I did

    asked on March 1, 2013
  2. Chemistry

    Which of the following pairs would make a good buffer solution in an aqueous solution? A) H2SO4 and NaHSO4 B) Ca(NO3)2 and HNO3 C) HCl and NaCl D) HF and NaOH E) none of them I know the answer is D but I don't understand why. I would think it would be C

    asked on March 20, 2013
  3. chemistry

    25cm3 of a solution of 0.1mol dm-3 NaoH reacts with 50cm3 of a solution of hydrochloric acid.What is the molarity of the acid

    asked on June 21, 2011
  4. Math

    What type of relationship is shown between the x- and y-values on the graph?

    asked on April 11, 2016
  5. Chemistry

    (Ksp= 5.0*10^-13) 1) Calculate the molar solubility of AgBr in 3.0×10^−2 M AgNO3 solution. 2) calculate the molar solubility of AgBr in 0.10 M NaBr solution. I tried solving using this the quadratic formula, but it didn't work. I started with these

    asked on March 17, 2013
  6. Chemistry

    0.15g of hydrogen chloride HCl is dissolved in water to make 8.0L of solution. What is the pH of the resulting hydrochloric acid solution?

    asked on March 1, 2013
  7. Math

    Alex mounts the clock on a wood base with the shape shown at the right what is the area of the wood base the composite figure is a square with a semicircle on top it the square is 18 inches in length and 20 inches in height

    asked on February 15, 2017
  8. Language Arts

    In Act 1, Scene 5, the young Scrooge’s beloved ends their relationship. She says, “Have I not seen your nobler aspirations fall off one by one, until the master—passion, Gain, engrosses you?”From this dialogue, what can you conclude is her reason

    asked on April 26, 2016
  9. Math ASAP HELP

    The following points are plotted on a coordinate plane:(-1,2),(-1,7), and (4,2). If the points are connected by straight lines, which shape will they form? A. an acute triangle***** B. a right triangle C. an obtuse triangle D. a quadrilateral Am i right??

    asked on May 25, 2018
  10. Math

    The region enclosed by the curve y = ex, the x-axis, and the lines x = 0 and x = 1 is revolved about the x-axis. Find the volume of the resulting solid formed. How do you do this?

    asked on February 25, 2018
  11. Math

    Alex then paints the face of the clock with white paint. It has a diameter of 14 inches. What is the area of the clock face? Next, Alex glued a band of metal around the circumference of the clock. What is the length of the metal band?

    asked on February 15, 2017
  12. Physics

    A light, ideal spring with a spring constant k = 100 N/m and uncompressed length L = 0.30 m is mounted to the fixed end of a frictionless plane inclined at an angle θ = 30.0° as shown above. Then a mass M 0.300 kg is affixed to the end of the spring and

    asked on October 22, 2017
  13. math

    Find the area of the figure. Round to the nearest tenth if necessary. T(-1,8), U(3,5), V(4,0), R(-3,0), S(-3,5)

    asked on April 8, 2018
  14. math

    Find the parametric equations of the line through the points (2, -1, 3) and (-1, 4, 0).

    asked on March 10, 2019
  15. Math

    Find the polar equation of the conic with focus at the pole, having eccentricity 5 and directrix y = -6. Thank you so Much!

    asked on March 10, 2019
  16. Chemistry

    Sulfur can form a bond with any of the following elements: oxygen, chlorine, bromine, or phosphorus. Which of those elements when bonded with sulfur produces the greatest degree of ionic character? Explain your answer.

    asked on November 5, 2018
  17. math

    Given that f(x) = -5x + 8 a. Find f^[-1](x) b. Find f(3) c. Find f^[-1](3) Thank You!!

    asked on April 29, 2018
  18. math

    Determine whether each statement is true or false. A chord that contains the center of the sphere is a diameter of the sphere. A tangent of a sphere is a line that intersects a sphere in exactly two points.

    asked on April 26, 2018
  19. math

    If a ball is thrown straight up from the top of a building that is 407 feet high, the position in feet above the ground is given by the function s(t) = -16t^2 + 75t + 407 where t is the number of seconds elapsed. a. How high is the projectile after 3

    asked on April 18, 2018
  20. math

    Find the area of the figure. Round to the nearest tenth if necessary. D(0,2), E(4, -2), F(8,2) instead of d and f connecting with a straight line, they are connected with half a circle/curve The highest point this semicircle part reaches is (4,6)...if im

    asked on April 8, 2018
  21. History

    Which of the following information would best be displayed through the use of a timeline?

    asked on February 24, 2016
  22. Chemistry

    The following reaction represent a propsed reaction mechanism for the formation C(C6H5)3OH from C(C6H3)3Cl. Step 1: C(C6H5)3Cl--> C(C6H5)3^+ + Cl- Step 2: C(C6H5)3^+ + OH- --> C(C6H5)3OH What are the intermediate product(s) of the net reaction? Explain

    asked on August 9, 2015
  23. Chemistry

    Suppose 100.0 mL of 1.00 M HCl and 100.0 mL of 1.00 M NaOH, both initially at 23.0°C, are mixed in a thermos flask. When the reaction is complete, the temperature is 29.8°C. Assuming that the solutions have the same heat capacity as pure water, compute

    asked on October 23, 2014
  24. Chemistry

    How do you determine that a certain reagent will result in syn addition, anti addition, or be nonstereospecific? For instance the addition of H2/Pt to a cis-cyclic alkene results in a syn addition. HCl in water is nonstereospecific and Br2 in CCl4 is an

    asked on November 21, 2013
  25. Chemistry-Pressure

    The wastewater solution from a factory containing high levels of salts needs to be diluted before it can be released into the environment. Therefore, two containers of waste solution are separated by a semipermeable membrane and pressure is applied to one

    asked on April 28, 2013
  26. Math, Calculus

    Find the derivative of the function. y= xcosx - sinx What's the derivative? I get only one trig function. I will be happy to critique your work or thinking. Use the chain rule on the first term. Our class hasn't covered Chain Rule. Only product and

    asked on March 6, 2007
  27. Science

    hey everyone this is my first post but im looking for some help i was sick and missed a lot of school and im working on a portfolio right now but i dont know exactly what to do because they did it over a live lesson but heres the question im stuck on: 3.

    asked on December 3, 2019
  28. world history

    How were the ancient Egyptians’ advancements in the fields of astronomy and mathematics helpful to farmers?

    asked on October 7, 2019
  29. Social Studies

    Why did cattle owners have to buy private property on which to keep their cattle

    asked on September 30, 2019
  30. history

    how does the Talmud show that studying Jewish sacred writings is an important part of Judaism? pls help :\

    asked on September 26, 2019
  31. math

    Find the polar equation of an ellipse with a focus at the pole and major axis endpoints (4, 0) and (2, 𝞹). Thank you!

    asked on March 10, 2019
  32. Chemistry

    what is the valence of Phosphorus in Phosphorus pentachloride? I think its 5, because thats how many valence electrons are in phosphorus.

    asked on November 19, 2018
  33. Chemistry

    What type of bonds exist between the atoms of NH4+? Explain the bond(s).

    asked on November 19, 2018
  34. Math

    Find the acute angle theta that satisfies the given equation. Give theta in both degrees and radians. cot(theta)=1/sqrt(3) The value of theta in degrees is (BLANK) degrees and in radians is (BLANK). Thank you!!

    asked on November 6, 2018
  35. math-finance

    The Colemans finance their home with a $90,000 mortgage loan at 9.25% APR. What will their monthly payments be if the load has a term of 15 years? when i did the calculations i got $926.27 but I'm not sure thats correct Thank you!

    asked on October 28, 2018
  36. math

    What is the natural logarithmic regression equation for the following data? Estimate the value for x = 15 x 2, 4, 7, 10 y 3, 8, 11, 12 Thank you!

    asked on October 25, 2018
  37. math

    Write the equation for a circle that has a center (-2, 4) and radius of 3cm.

    asked on May 14, 2018
  38. math

    Every great circle of a sphere passes through its center. true or false?

    asked on April 29, 2018
  39. math

    Find the surface area of a cylinder with the given dimensions. Round to the nearest tenth. d= 14mm and H = 32mm

    asked on April 20, 2018
  40. math

    Jessie paddled her canoe 20 miles upstream, then paddled back. If the speed of the current was 3 mph and the total trip took 7 hours, what was Jessie’s speed?

    asked on April 18, 2018
  41. math

    Find the lengths of each side give the following right triangle: Base=x hypotenuse=x+6 last side=x+3 thank you!

    asked on April 14, 2018
  42. Math

    There are 20 pink balloons in a bunch of 100. 34 people out of 100 like pink balloons( versus other colors). What is the probability that a person liking pink balloons gets 5 pink balloons when taking 7 random balloons from the bunch? (dependent events)

    asked on February 13, 2018
  43. Math

    What is the probability of in a room with 15 people, there will be at least one shared birthday?

    asked on February 13, 2018
  44. Chemistry

    Determine the angular/ Radial nodes of n=4, l=2, and ml=-2 Does the m sub l value even matter?

    asked on October 19, 2017
  45. Social Studies

    As a result of the 1763 Treaty of Paris, Great Britain gained complete control over?

    asked on March 12, 2016
  46. Math

    What is the best estimate for the sum of 5/12+2/5

    asked on February 25, 2016
  47. Calculus

    for a normal curve what percentage of values falls beyond two standard deviations from the mean

    asked on June 14, 2015
  48. Chemistry

    Consider the titration of 20.0mL of 0.300M acetic acid, HAc, with 0.150M NaOH solution. Ka=1.75*10^-5 HAc + NaOH ---> NaAc + H2O What is the composition of the solution at the equivalence point of the titration? Give both the formula of the compound and

    asked on May 1, 2015
  49. Science-DNA

    Why DNA cannot grow from 3’ to 5’ direction — why this is important for proofreading?

    asked on November 16, 2014
  50. Can you check my answer - Physics

    A balloonist drops an apple weighing 1.5 N over the side of the balloon's gondola. As it falls and increases speed, the drag force from the air upward on it increases. When the upward force is 0.7 N, what is the direction and magnitude of the net force on

    asked on November 9, 2014
  51. Calculus

    How can you tell where on a graph f is discontinuous? What are the criteria?

    asked on October 10, 2013
  52. Algebra

    The volume of a rectangular solid is 250 cubic centimeters. If its length is tripled, its width is halved, and its height is quadrupled, what is the new volume, in cubic centimeters?

    asked on May 17, 2013
  53. Chemistry

    Glycerol is a nonvolatile water soluble material. It's density is 1.25g/ml. Predict the vapor pressure of a solution of 2.40E2 ml of glycerol, in 385ml of water, at the normal boiling pt of water.

    asked on April 7, 2013
  54. Chemistry

    A tank contains exactly 10^(6)liters of pure water. 1.0*10^(-6) moles of HCl (g) is bubbled into this tank. What is the resulting pH? The answer is 7, but I was only able to deduce that based on the fact that water has a neutral pH, but there's a

    asked on March 22, 2013
  55. Chemistry

    What is the pH of a solution that is .060M in potassium propionic and .085M in propionic acid? Ka=1.3E-5 for the acid. The answer is +4.73 but I don't know how to go about the problem. I thought that the potassium propionic was reacting with the acid to

    asked on March 21, 2013
  56. Chemistry

    Which of the following salts is NOT more soluble in acidic solution than in pure water? A. ZnS B. AgCN C. Ba3(PO4)2 D. ZnCO3 E. BiI3 The answer is E, but I don't know why or how I would go about answering a question like this. What would I have to consider

    asked on March 21, 2013
  57. Chemistry

    A sealed 1.0L flask is charged with .500mol I2 and .500mol Br2 and an equilibrium reaction esues: I2(g)+Br2(g)=2IBr(g) When the container contents achieve equilibrium, the flask contains .84 mol of IBr. What is the value of the eqilibrium constant? (K)

    asked on March 21, 2013
  58. Chemistry

    Why does the color of Methyl Orange change at all in he presence of buffer components?

    asked on March 21, 2013
  59. Chemistry

    Why is a dilute solution of boric acid H3BO3 used as an eyewash? How does it work in cleansing the eye from chemicals?

    asked on March 20, 2013
  60. Chemistry

    The standardized NaOH solution was determined to be 120M whereas the mass of the sample of impure tartaric acid was 1.35g. If the initial reading of the buret volume changed from 48 ml to a final reading of 17 ml at the endpoint of the titration of the

    asked on February 28, 2013
  61. Chemistry

    What are the units for rate constant? I know each may have different units for the k value, I just don't know how to get them. How can I tell just by looking at a given rate law?

    asked on February 15, 2013
  62. Chemistry

    What is the osmotic pressure of .100 M solution of aluminum chloride at 27 deg C? I used the formula: pi=(i)(M)(R)(T) wasn't sure what i was but for M put down 0.100M, R=0.08206 and T=300K Answer is 9.85, but not sure how to get that.

    asked on February 13, 2013
  63. Chemistry

    The freezing point of ethanol is -114.6 deg Celsius and its Kf value is 2.00degC/m. What is the freezing point for a solution prepared by dissolving 50.0g of glycerin in 200g ethanol? I thought it may have been using the formula deltaT=Kf*m, but I'm not

    asked on February 13, 2013
  64. Science

    What are 6th grade examples of negative feedback mechanism?

    asked on January 17, 2013
  65. Chemisty

    A 0.5-L saturated solution of silver chloride, AgCl, is evaporated to dryness. The residue is equivalent to 1.4 x 10^-3 mole. Calculate the experimental value of the Ksp of silver chloride. Show all of your work.

    asked on May 5, 2012
  66. Spanish

    Coud someone please check my answers to the questions? 1.¿Qué apagas cuando tienes frío? Apago la ventiladora cuando tengo frío. 2.¿Dónde están las cosas muy frías en tu cocina? Están en el refrigerador. 3.¿Qué usa tu madre para cocinar? Ella

    asked on January 25, 2012
  67. Pre-Calc

    I'm so stuck-this stuff is so far above me right now-Please help where do I even start? Any hint would be so helpful- (3x^3-5^2+6x-9)/(x+5) or can someone direct me to a site that can solve this and show the steps-I don't even know where to start Thank you

    asked on September 9, 2011
  68. Pre-Calc

    I'm so stuck-this stuff is so far above me right now-Please help (3x^3-5^2+6x-9)/(x+5) or can someone direct me to a site that can solve this and show the steps-I don't even know where to start Thank you

    asked on September 9, 2011
  69. Math

    7(x-2)+3(x+2)=5(x-6) x=?

    asked on June 11, 2011
  70. chemistry

    Calculate the pH at each stage in the titration of 25.0 ml 0.10 M KOH(aq) with 0.25 M HCl(aq). 1. Initiall ( before titration). 2. After addition of 5 ml of HCl. 3. After addition of 9.5 ml of HCl. 4. At the equivalent point. 5. After addition of 12 ml of

    asked on April 30, 2011
  71. Chemistry

    How do cross linked branched polymers compare to cross linked linear polymers?

    asked on February 20, 2008
  72. science

    i need help on my science project i have a science fair on march somethin please give me any ideas possible u know plz thanks. (0.o)

    asked on January 23, 2008
  1. geography

    yo this is my first response but, 1.B 2.A,D 3.B 4.A 5.A 6.B 7.B 8.D 9.D 10.C 11.A 12.B 13.A,D 14.D 15.B 16.B,C 17.C 18.B 19.B 20.A 21.A,C 22.B

    posted on November 29, 2019
  2. check answers pls

    k marshmallow im trusting u if u make my D go to an F im suing you

    posted on November 5, 2019

    yall charlie is wrong and is setting you up for failure i got a 12/25 DO NOT TRUST HIM

    posted on October 11, 2019

    im trusting you charlie if you are wrong its over for you

    posted on October 11, 2019
  5. math

    I say it's 7- 35-min+4-min=39-min 5hours and 12-min=300 300÷39=7tripsR27-min

    posted on October 9, 2019
  6. math

    Thank you so much!!

    posted on March 10, 2019
  7. Language Arts

    SHut up dont tell us how to live our lives

    posted on May 30, 2018
  8. Language Arts

    omg your right except 11 is b

    posted on May 29, 2018
  9. Math-please help

    rose waiiiit are you in 6th grade cause from all of your posts im learning the same exact thing

    posted on May 29, 2018
  10. Math ASAP HELP


    posted on May 25, 2018
  11. Math ASAP HELP


    posted on May 25, 2018
  12. Math ASAP HELP

    it didn't make sense

    posted on May 25, 2018
  13. Math ASAP HELP

    i tried

    posted on May 25, 2018
  14. Chemistry

    If 22.5 L of oxygen react with excess hydrogen, how many liters of water vapor (gaseous water) could be produced

    posted on February 26, 2018
  15. physics


    posted on November 30, 2017
  16. physical

    Branches Of Physical Education

    posted on September 18, 2017
  17. Science

    Eather A B C or D

    posted on September 6, 2016
  18. Chemistry

    Thank you so much. You cleared things up.

    posted on May 1, 2015
  19. Can you check my answer - Physics

    oh okay thanks!

    posted on November 9, 2014
  20. 3rd grade

    Yes because you don't have equal number of groups.

    posted on October 29, 2013
  21. Calculus

    Alright I was clarifying since it's going to be graded. Doesn't hurt, does it?

    posted on October 11, 2013