# Posts by jonah

Total # Posts: 58

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

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?

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 for ...

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

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

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

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

Science
Eather A B C or D

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 your answer. What ...

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

Chemistry
Thank you so much. You cleared things up.

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 its concentration. ...

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

Can you check my answer - Physics
oh okay thanks!

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 the apple? 9.8 N ...

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 the heat ...

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 anti addition. How can ...

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

Calculus
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.

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

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?

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 container, forcing ...

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.

Chemistry
Using data from Appendix C in the textbook, calculate the equilibrium pressure of CO2 at 1000K .

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 mathematical way to do it ...

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 form their ...

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 to determine this?

Chemistry
Never mind I figured it out

Chemistry
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.

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)

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

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

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 since a goo buffer ...

Chemistry
How would I do it without the quadratic formula?

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 equations ...

Chemistry
Yeah that is what I put in as my answer since it asked for two sigfis, but it was still wrong.

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 [(6.309E-4)^(2)]/(1.8E-...

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?

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 impure sample calculate ...

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?

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.

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 sure.

Science
What are 6th grade examples of negative feedback mechanism?

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.

Spanish
I think number 4 is wrong. Should it be Mi ropa está en el armario?

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.¿...

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

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

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

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

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 HCl

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

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

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)

physics