Jonah
This page lists questions and answers that were posted by visitors named Jonah.
Questions
The following questions were asked by visitors named Jonah.
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 quotie...
18 years ago
How do cross linked branched polymers compare to cross linked linear polymers?
17 years ago
7(x-2)+3(x+2)=5(x-6) x=?
14 years ago
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
14 years ago
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 yo...
14 years ago
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 usa el horno...
13 years ago
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.
13 years ago
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 s...
12 years ago
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.
12 years ago
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?
12 years ago
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 im...
12 years ago
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 [...
12 years ago
(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 equati...
12 years ago
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 s...
12 years ago
Why is a dilute solution of boric acid H3BO3 used as an eyewash? How does it work in cleansing the eye from chemicals?
12 years ago
Why does the color of Methyl Orange change at all in he presence of buffer components?
12 years ago
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)
12 years ago
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 conside...
12 years ago
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 f...
12 years ago
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 mathemat...
12 years ago
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.
12 years ago
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...
12 years ago
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?
12 years ago
How can you tell where on a graph f is discontinuous? What are the criteria?
12 years ago
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 a...
11 years ago
Why DNA cannot grow from 3’ to 5’ direction — why this is important for proofreading?
10 years ago
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 i...
10 years ago
What is the best estimate for the sum of 5/12+2/5
9 years ago
As a result of the 1763 Treaty of Paris, Great Britain gained complete control over?
9 years ago
What type of relationship is shown between the x- and y-values on the graph?
9 years ago
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 for reje...
9 years ago
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?
8 years ago
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 years ago
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 a...
7 years ago
What is the probability of in a room with 15 people, there will be at least one shared birthday?
7 years ago
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)
7 years ago
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?
7 years ago
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)
7 years ago
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...
7 years ago
Find the lengths of each side give the following right triangle: Base=x hypotenuse=x+6 last side=x+3 thank you!
7 years ago
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 seco...
7 years ago
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?
7 years ago
Find the surface area of a cylinder with the given dimensions. Round to the nearest tenth. d= 14mm and H = 32mm
7 years ago
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.
7 years ago
Every great circle of a sphere passes through its center. true or false?
7 years ago
Given that f(x) = -5x + 8 a. Find f^[-1](x) b. Find f(3) c. Find f^[-1](3) Thank You!!
7 years ago
Write the equation for a circle that has a center (-2, 4) and radius of 3cm.
7 years ago
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!
6 years ago
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!
6 years ago
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.
6 years ago
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!!
6 years ago
What type of bonds exist between the atoms of NH4+? Explain the bond(s).
6 years ago
what is the valence of Phosphorus in Phosphorus pentachloride? I think its 5, because thats how many valence electrons are in phosphorus.
6 years ago
Find the polar equation of an ellipse with a focus at the pole and major axis endpoints (4, 0) and (2, 𝞹). Thank you!
6 years ago
Find the polar equation of the conic with focus at the pole, having eccentricity 5 and directrix y = -6. Thank you so Much!
6 years ago
Find the parametric equations of the line through the points (2, -1, 3) and (-1, 4, 0).
6 years ago
Why did cattle owners have to buy private property on which to keep their cattle
6 years ago
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....
5 years ago
Jakarta is filling in a Venn diagram with characteristics on the middle section by writing about the things they had in common. Which statement could she put in this section? Select the two correct answers
4 years ago
(3 3/8)^1 ½
4 years ago
Bricks have a mass of 1.75kg each. How many bricks are there in 21/4tonnes
2 years ago
Answers
The following answers were posted by visitors named Jonah.
I think number 4 is wrong. Should it be Mi ropa está en el armario?
13 years ago
Yeah that is what I put in as my answer since it asked for two sigfis, but it was still wrong.
12 years ago
How would I do it without the quadratic formula?
12 years ago
I2(g)+Br2(g)=2IBr(g) I .500 .500 0 C -x -x +2x E .500-x .500-x .84 I know K=[product]/[reactant] but I don't know what to do with the information from there.
12 years ago
Never mind I figured it out
12 years ago
Using data from Appendix C in the textbook, calculate the equilibrium pressure of CO2 at 1000K .
12 years ago
What if there isn't a fraction at all and it's just a graph with a function on it? My homework doesn't have a given expression of a function just a graphical representation of it.
12 years ago
Alright I was clarifying since it's going to be graded. Doesn't hurt, does it?
12 years ago
oh okay thanks!
10 years ago
Thank you so much. You cleared things up.
10 years ago
Eather A B C or D
9 years ago
Branches Of Physical Education
8 years ago
If 22.5 L of oxygen react with excess hydrogen, how many liters of water vapor (gaseous water) could be produced
7 years ago
i tried
7 years ago
it didn't make sense
7 years ago
thanks
7 years ago
rose waiiiit are you in 6th grade cause from all of your posts im learning the same exact thing
7 years ago
omg your right except 11 is b
7 years ago
are those for the Lesson 18: Adventures and Imagination Unit Test
7 years ago
plsss answer
7 years ago
ive literally waited for 2 days
7 years ago
OMG HE IS RIGHTTTTTTT THX GOT 100%!!!!!!!!!!!!!!!!!!!!!
7 years ago
Thank you so much!!
6 years ago
I say it's 7- 35-min+4-min=39-min 5hours and 12-min=300 300÷39=7tripsR27-min
6 years ago
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
5 years ago
Pretty nice post. I juhst syumbled upon your weblog and waznted to say that I've really enjoyed surfing around your blg posts. In aany case I'll be subscribing to your rss feed and I hope youu write again very soon! горокоп horoscope for today the lion wo...
5 years ago
B is the answer. For the people asking.
4 years ago
A motor car accelerate for 10 sec to attain a velocity of 20 MLS, it continues with uniform that it stops further 20 sec calculate 1acceleratio 2deceleration 3distance travel
3 years ago
No its wrong
3 years ago