Jonah
Popular questions and responses by Jonah
Chemistry
If acetic acid is the only acid that vinegar contains [Ka = 1.8*105] , 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 6.309E4. Then I did
asked on March 1, 2013 
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 
chemistry
25cm3 of a solution of 0.1mol dm3 NaoH reacts with 50cm3 of a solution of hydrochloric acid.What is the molarity of the acid
asked on June 21, 2011 
Math
What type of relationship is shown between the x and yvalues on the graph?
asked on April 11, 2016 
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 
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 
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 
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 
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 
Math
The region enclosed by the curve y = ex, the xaxis, and the lines x = 0 and x = 1 is revolved about the xaxis. Find the volume of the resulting solid formed. How do you do this?
asked on February 25, 2018 
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 
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 
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 
math
Find the parametric equations of the line through the points (2, 1, 3) and (1, 4, 0).
asked on March 10, 2019 
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 
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 
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 
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 
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 
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 
History
Which of the following information would best be displayed through the use of a timeline?
asked on February 24, 2016 
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 
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 
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 ciscyclic alkene results in a syn addition. HCl in water is nonstereospecific and Br2 in CCl4 is an
asked on November 21, 2013 
ChemistryPressure
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 
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 
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 
world history
How were the ancient Egyptians’ advancements in the fields of astronomy and mathematics helpful to farmers?
asked on October 7, 2019 
Social Studies
Why did cattle owners have to buy private property on which to keep their cattle
asked on September 30, 2019 
history
how does the Talmud show that studying Jewish sacred writings is an important part of Judaism? pls help :\
asked on September 26, 2019 
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 
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 
Chemistry
What type of bonds exist between the atoms of NH4+? Explain the bond(s).
asked on November 19, 2018 
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 
mathfinance
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 
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 
math
Write the equation for a circle that has a center (2, 4) and radius of 3cm.
asked on May 14, 2018 
math
Every great circle of a sphere passes through its center. true or false?
asked on April 29, 2018 
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 
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 
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 
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 
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 
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 
Social Studies
As a result of the 1763 Treaty of Paris, Great Britain gained complete control over?
asked on March 12, 2016 
Math
What is the best estimate for the sum of 5/12+2/5
asked on February 25, 2016 
Calculus
for a normal curve what percentage of values falls beyond two standard deviations from the mean
asked on June 14, 2015 
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 
ScienceDNA
Why DNA cannot grow from 3’ to 5’ direction — why this is important for proofreading?
asked on November 16, 2014 
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 
Calculus
How can you tell where on a graph f is discontinuous? What are the criteria?
asked on October 10, 2013 
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 
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 
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 
Chemistry
What is the pH of a solution that is .060M in potassium propionic and .085M in propionic acid? Ka=1.3E5 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 
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 
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 
Chemistry
Why does the color of Methyl Orange change at all in he presence of buffer components?
asked on March 21, 2013 
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 
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 
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 
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 
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 
Science
What are 6th grade examples of negative feedback mechanism?
asked on January 17, 2013 
Chemisty
A 0.5L 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 
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 
PreCalc
I'm so stuckthis stuff is so far above me right nowPlease help where do I even start? Any hint would be so helpful (3x^35^2+6x9)/(x+5) or can someone direct me to a site that can solve this and show the stepsI don't even know where to start Thank you
asked on September 9, 2011 
PreCalc
I'm so stuckthis stuff is so far above me right nowPlease help (3x^35^2+6x9)/(x+5) or can someone direct me to a site that can solve this and show the stepsI don't even know where to start Thank you
asked on September 9, 2011 
Math
7(x2)+3(x+2)=5(x6) x=?
asked on June 11, 2011 
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 
Chemistry
How do cross linked branched polymers compare to cross linked linear polymers?
asked on February 20, 2008 
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

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 
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 
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 
PLEASE CHECK OPERATIONS WITH FRACTIONS
im trusting you charlie if you are wrong its over for you
posted on October 11, 2019 
math
I say it's 7 35min+4min=39min 5hours and 12min=300 300÷39=7tripsR27min
posted on October 9, 2019 
math
Thank you so much!!
posted on March 10, 2019 
Language Arts
SHut up dont tell us how to live our lives
posted on May 30, 2018 
Language Arts
omg your right except 11 is b
posted on May 29, 2018 
Mathplease 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 
Math ASAP HELP
thanks
posted on May 25, 2018 
Math ASAP HELP
B?
posted on May 25, 2018 
Math ASAP HELP
it didn't make sense
posted on May 25, 2018 
Math ASAP HELP
i tried
posted on May 25, 2018 
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 
physics
30
posted on November 30, 2017 
physical
Branches Of Physical Education
posted on September 18, 2017 
Science
Eather A B C or D
posted on September 6, 2016 
Chemistry
Thank you so much. You cleared things up.
posted on May 1, 2015 
Can you check my answer  Physics
oh okay thanks!
posted on November 9, 2014 
3rd grade
Yes because you don't have equal number of groups.
posted on October 29, 2013 
Calculus
Alright I was clarifying since it's going to be graded. Doesn't hurt, does it?
posted on October 11, 2013