# A$!@N

### What volume of a 0.170 M potassium hydroxide solution is required to neutralize 28.3 mL of a 0.125 M hydrobrom?

What volume of a 0.170 M potassium hydroxide solution is required to neutralize 28.3 mL of a 0.125 M hydrobromic acid solution?

2 AnswersChemistry8 years ago### Diff EQ Problem Help?

Solve the initial value problem.

3y' - 6y = e^((pi*t)/2) , y(0) = a

Let a0 be the value of a for which the transition from one type of behavior to another occurs. Find the critical value a0 exactly.

1 AnswerMathematics9 years ago### DIFFERENTIAL EQUATION HELP?

Solve the differential equation.

(x^2 + 8y^2)/(7xy)

1 AnswerMathematics9 years ago### Binary representation?!?

Find the binary representation and then convert that into 6 bits binary representation??

Here is the #: 0.89342

(please shoe me how to do it in steps!)

1 AnswerProgramming & Design9 years ago### Integration problem.?

Directions: First make a substitution and then use integration by parts to evaluate the integral.

definite integral [1,4] ∫ e^(sqrt(x))

Answer is: 2*E^Sqrt[x]*(-1 + Sqrt[x])

I don't understand this, please show me step by step on what you are substituting first and then how you are integrating that by parts...

5 AnswersMathematics9 years ago### HOW TO INTEGRATE THIS?

Please show me step by step on how to integrate this...

undefined integral (x / (1-x^(4))^(1/2))

2 AnswersMathematics9 years ago### HOW TO INTEGRATE THIS?

Please show me in steps how to integrate this

definite integral [1,2] 1/(2-3x) dx

1 AnswerMathematics9 years ago### Curve sketching help in CALCULUS!?

Y = X/ (X+3)

1. domain

2. x and y intercepts

3.symmetric or not?

4. take the limit +/- infiniti

5. 1st derivative

6. local max min?

7. 2nd derivative

8. inflection point?

1 AnswerMathematics10 years ago### Derivative help Calculus?

y(x) = [(x+2)^(2/3)] (5x-1)^(-3) (x^(5) - 8)

y '(x) = ??

2 AnswersMathematics10 years ago### Can one person change the world?

- PLEASE RELATE YOUR RESPONSE TO THE CIVIL RIGHTS MOVEMENTS THAT OCCURED AROUND THE WORLD.

EX: Such as Inida's struggle for freedom and African Americans struggle for equality.

7 AnswersOther - Society & Culture10 years ago### RELATED RATES CALCULUS HELP!?

At noon, ship A is 150 km west of ship B. Ship A is sailing east at 35 km/h and ship B is sailing north at 25 km/h. How fast is the distance between the ships changing at 4:00 pm ?

3 AnswersMathematics1 decade ago### What changed from the 1940’s to the 1950’s in the US that allowed for non-violence protesting in the us.?

why was it viwed to be unpatriotic prior to the 1950's???

What events influned this change???

1 AnswerHistory1 decade ago### AP calculus AB help!?

The base of a solid is the region in the first quadrant bounded by the y-axis, the graph of y = tan^(-1)X the horizontal line y= 3 and the vertical line X = 1. For this solid, each cross section perpendicular to the X-axis is a square. What is the volume of the solid?

I think it could either be: 2.5 ... 6.6 .... 8.0 .... 8.7 ... or maybe 20.7

2 AnswersMathematics1 decade ago### What books have good grammar?

I need to know whihc books exemplify perfect grammar in the english language.

1 AnswerBooks & Authors1 decade ago### AP CHEM TEST TOMORROW!!! HELP?

At 25 degrees C, the solubility product constant, Ksp, for strontium sulfate, SrSO4, is 7.6x10^(-7). The solubility product constant for Strontiumfluoride, SrF2, is 7.9 x 10^(-10).

(a) molar solubility of SrSO4 in pure H20 at 25 degrees C.

(b) molar solubility of SrF2 in pure H20 at 25 degrees C.

(c) an aqueous solution of Sr(NO3)2 is added slowly to 1.0 liter of a well-stirred solution containging .02 mole F- and .1 mole So4 at 25 degress C (You may assume that the added Sr(NO3)2 slution does not materiealy affect the total volume of the system)

1. which salt percipitates first?

2. what is the concentration of strontium ion Sr^(2+) in the solution when the first precipitate begins to form?

(d) assume more Sr(No3)2 is added to the mixture in (c) a second percipitate begins to form. At the stage, what percent of the anioin of the first precicpiate remains in the solution?

I GOT....

(a) x= 8.7 x 10 ^( -4)

(b) x= 9.2 x 10 ^( -4)

1. SrSO4

1 AnswerChemistry1 decade ago### AP CHEM HELP!!! DUE TOMORROW!! :[?

It is found that 24.68mL of 0.1165M NaOH is needed to titrate 0.2931g of an unknown acid to the phenolphthalein end point. Calculate the equivalent mass of the acid.

2 AnswersChemistry1 decade ago### CHEMITRY QUESTION KINETICS HELP!! TEST TOMORROW!!!?

A(g) + B(g) ---> C(g) + D(g)

For the gas-phase reactions above, the following experimental data were obtained.

__________________________________________________________

Intial [A] _______Intial [B]_______Inial Rate

1.) .033 _____ .034 _____ 6.67x10^ -4

2.) .034 _____ .137 _____ 1.08x10^ -2

3.) .136 _____ .136 _____ 1.07x10^ -2

4.) .202 _____ .233 _____ ???

__________________________________________________________

(a.) Determine the order of the reactionwith respect to reactant A. Justify your answer.

(b.) Determine the order of the reaction with respect to reactant B. Justify your answer.

(c.) Write the rate law for the overall reaction.

(d.) Calculate the rate for experiment # 4.

2 AnswersChemistry1 decade ago### what product is formed at the anode when molten sodium cholride, NaCl is electeolyzed using a downs cell?

What is a downs cell.

does this have to do witht the charges??

1 AnswerChemistry1 decade ago### AP CHEMISTRY HELP DUE 2MARROW!!!?

2.) The remnants of a prehistoric fire in peru showed a carbon 14 decay rate of 3.1 counts/min. The decay rate of carbon-14 in fresh wood is 13.6 counts/min. The half-life of carbon-14 is 5730 years.

A. What is the decay constant for Carbon-14 (t1/2 = 5730) ?

B. How old are the fire remnants?

1 AnswerChemistry1 decade ago