# Jonah

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

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

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

4. ## Math

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

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

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?

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

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

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??

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?

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?

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

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)

14. ## math

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

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!

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.

17. ## math

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

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.

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

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

21. ## History

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

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

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

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

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

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

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.

28. ## world history

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

29. ## Social Studies

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

30. ## history

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

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!

32. ## Chemistry

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

33. ## Chemistry

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

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!!

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!

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!

37. ## math

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

38. ## math

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

39. ## math

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

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?

41. ## math

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

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)

43. ## Math

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

44. ## Chemistry

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

45. ## Social Studies

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

46. ## Math

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

47. ## Calculus

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

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

49. ## Science-DNA

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

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

51. ## Calculus

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

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?

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.

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

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

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

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)

58. ## Chemistry

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

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?

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

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?

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.

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

64. ## Science

What are 6th grade examples of negative feedback mechanism?

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.

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

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

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

69. ## Math

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

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

71. ## Chemistry

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

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)

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

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

posted on November 5, 2019
3. ## PLEASE CHECK OPERATIONS WITH FRACTIONS

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
4. ## PLEASE CHECK OPERATIONS WITH FRACTIONS

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

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

thanks

posted on May 25, 2018
11. ## Math ASAP HELP

B?

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

30

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