# 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

**3rd grade**

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**

i choose answer d.

**the story of thesis**

THESIS was the protogena (primordial goddess) of creation, a divinity related to Phusis (Nature). She occurs in the Orphic Theogonies as the first to emerge at creation alongside the Hydros (the primordial waters). Sometimes she was represented instead as the female aspect of ...

**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 quotient rule. ...

**Science**

kinetic energy is the energy that you use when an object is consistantly moving. for example wind is a kinetic energy because it is consistantly moving around or it has been moved.

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