Tuesday

April 21, 2015

April 21, 2015

Total # Posts: 75

**precalculus**

find an hyperbola equation with foci (0, +/-8) and asymptotes; y=+/-1/2x?
*April 16, 2015*

**precalculus**

find a hyperbola equation with vertices (o,+-4) and passes through the point (3,-5)
*April 16, 2015*

**chemistry help**

a 3.54 grams solid sample of an unknown monoprotic acid was dissolved in distilled water to produce a 47.0 mL solution at 25 degrees. This solution was then titrated with 0.2 M NaOH. The equivalence point was reached when 35.72 mL of 0.2 M NaOH was delivered. A. find the ...
*April 1, 2015*

**chemistry help**

In the following questions, assume that no excess distilled water was added from a wash bottle during the titration of 10.00 mL of vinegar with your standardized solution of NaOH. A. calculate the pH of vinegar. B. what was the pH of the solution after 4.00 mL of titrant was ...
*April 1, 2015*

**chemistry help**

A 15.00 mL sample of an unknown monoprotic weak acid solution is titrated with 0.35 M NaOH. The initial buret reading is 0.23 mL. The phenolphthalein indicator turns the solution light pink when the buret reads 29.58 mL. B. How many moles of NaOH were delivered? C. How many ...
*April 1, 2015*

**chemistry**

you cant solve it?
*April 1, 2015*

**chemistry**

In the following questions, assume that no excess distilled water was added from a wash bottle during the titration of 10.00 mL of vinegar with your standardized solution of NaOH. A. calculate the pH of vinegar. B. what was the pH of the solution after 4.00 mL of titrant was ...
*April 1, 2015*

**chemistry**

A 15.00 mL sample of an unknown monoprotic weak acid solution is titrated with 0.35 M NaOH. The initial buret reading is 0.23 mL. The phenolphthalein indicator turns the solution light pink when the buret reads 29.58 mL. A. what volume of 0.35 M NaOH was delivered? B. How many...
*April 1, 2015*

**chemistry**

finding all the answers
*April 1, 2015*

**chemistry**

a 3.54 grams solid sample of an unknown monoprotic acid was dissolved in distilled water to produce a 47.0 mL solution at 25 degrees. This solution was then titrated with 0.2 M NaOH. The equivalence point was reached when 35.72 mL of 0.2 M NaOH was delivered. A. find the ...
*April 1, 2015*

**easy math**

√(100 - 20√5 + 5 + 15 - 6√15 + 9) solve.
*March 31, 2015*

**precalculus help**

Let z1=2(cos 2pi/3+isin 2pi/3) what are z1^(1/3)? do not even know how to apply demoivre theorem?
*March 31, 2015*

**precalculus**

algebraically identify the symmetries of r=2sin(2theta)
*March 31, 2015*

**Philosophy**

evolbiol.ru/blankslate/blankslate.htm
*March 31, 2015*

**precalculus**

Let u have a length of 20 and direction of 60 degrees, and v= 5i-3j what is u? what is abs(2v-u)?
*March 31, 2015*

**precalculus**

Let z1=2(cos 2pi/3+isin 2pi/3) what are z1^(1/3)?
*March 31, 2015*

**precalculus**

Let u= <3,1> and v=<6,-1> A. what is the angle between u and v? B. find projvU C. reoslve u into u1 parallel to v abd U2 perpendicular to v.
*March 31, 2015*

**us history**

free soil party
*March 31, 2015*

**precalculus**

B. find projected vU C. resolve u into u1 parallel to v and U2 perpendicular to v.
*March 31, 2015*

**precalculus**

Let u= <3,1> and v=<6,-1> A. what is the angle between u and v? B. find projvU C. reoslve u into u1 parallel to v abd U2 perpendicular to v.
*March 31, 2015*

**precalculus**

what are those numbers in radians
*March 31, 2015*

**precalculus**

no not at all
*March 31, 2015*

**precalculus**

Let z1=2(cos 2pi/3+isin 2pi/3) what are z1^(1/3)?
*March 31, 2015*

**precalculus**

solve the rest because i am not getting correct answer?
*March 31, 2015*

**precalculus**

Let u have a length of 20 and direction of 60 degrees, and v= 5i-3j what is u? what is abs(2v-u)?
*March 31, 2015*

**chemistry**

calculate the pH after 0.02 mol NaOH is added to 1.00 L of .1 M sodium propanoate NaC3H5O2
*March 29, 2015*

**chemistry**

PH of gatorade and body sweat
*March 29, 2015*

**Grade 11 Chemistry**

find the moles of each element then divided by total volume
*March 28, 2015*

**SUPER HARD CHEMISTRY**

a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point
*March 28, 2015*

**HARD COLLEGE CHEMISTRY**

thanks
*March 28, 2015*

**HARD COLLEGE CHEMISTRY**

a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point and 5 mL past the equivalence point. how much is 5 mL past? i do not know how to do it?
*March 28, 2015*

**COLLEGE CHEMISTRY HARD**

a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point and 5 mL past the equivalence point. how much is 5 mL past? i do not know how to do it?
*March 28, 2015*

**COLLEGE CHEMISTRY HARD**

jai i still need help
*March 28, 2015*

**COLLEGE CHEMISTRY HARD**

calculate the ph at the equivalence point for the titration of 0.01 M Ch3COOH with 0.1 M NaoH ka= Ch3Cooh 1.8E-5 idek how to do it?
*March 28, 2015*

**college chemistry HARD**

thanks
*March 28, 2015*

**college chemistry HARD**

I STILL NEED HELP WITH EQUIVALENCE POINT WITH THIS PROBLEM
*March 28, 2015*

**college chemistry HARD**

a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point and 5 mL past the equivalence point. how much is 5 mL past? i do not know how to do it?
*March 28, 2015*

**chemistry**

calculate the ph at the equivalence point for the titration of .1 M NH3 and .1 M HCl. kb NH3= 1.8E-5 how you do it?
*March 28, 2015*

**chemistry**

calculate the ph at the equivalence point for the titration of 0.01 M Ch3COOH with 0.1 M NaoH ka= Ch3Cooh 1.8E-5 idek how to do it?
*March 28, 2015*

**chemistry**

a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point and 5 mL past the equivalence point. how much is 5 mL past? i do not know how to do it?
*March 28, 2015*

**math - exponent laws**

now you mention,yes I could have paste the link but i didn't think of it, SORRY! Thank You very much!
*February 10, 2015*

**math - exponent laws**

evaluate -(11/17^-10/(9/5)^(1/10) answer from Reiny: (-11/-17)^-10 = 1/(11/17)^10 = 77.725... (I stored that in A on my calculator) (9/5)^(1/10) = 1.0605.. so -(11/17^-10/(9/5)^(1/10) = -77.725... /1.0605... = -73.28837824 --- do we need to reciprocal -(11/17) to -(17/11) ?
*February 10, 2015*

**MATH - exponent laws**

do we need to reciprocal -(11/17) to -(17/11) ?
*February 9, 2015*

**MATH - exponent laws**

how do you evaluated this? (-)sign ↓ _ __________( -11/-17)^-10 line is divide (9/5)^1/10
*February 9, 2015*

**math**

Sam bought a new car for $26,500. The car depreciates approximately 13% of its value each year. A) What is the decay factor for the value of this car? b) Write an equation to model the decay value of this car? c) What will the value of the car be in 10 years?
*June 27, 2014*

**Math**

angles ABC and XYZ are complementary angles. if m < ABC is 18 more than three times m < XYZ, find < XYZ i have no idea how to do this i know that something has to equal 18+ 3m but i dont understand the (<) sings
*June 15, 2014*

**Math**

4*3 8*9
*April 23, 2014*

**chemistry**

Where is an electron in 3Py orbital most likely to be found and where does the probability it vanish?
*December 26, 2013*

**8th Grade Science**

jk
*October 12, 2013*

**Physics (mechanics)**

A u-control airplane of mass m is attached by control wires of length L and negligible mass to the "pilot" who controls the lift provided by the wing FL. The wires control the plane's elevator or angle of attack. The plane's engine keeps it moving at constant...
*July 9, 2013*

**Alan**

could anyone test ACDE??
*April 13, 2013*

**physics**

exercise 4.1 suppose the pilot start agin from rest
*March 17, 2013*

**parallelograms**

52.2
*February 26, 2013*

**geometry**

there are 4 cirlces in an equilateral triangle with sides equal to 16cm. what is the radius of the big circle and the little circles
*February 25, 2013*

**Economics**

jk
*November 23, 2012*

**chemistry**

for empirical formula C=3.97mg; H=0.44mg; and O=5mg-3.97mg-0.44mg=0.59mgO Then 0.59mg/16g=0.036mmol. Then you good to go! Thank you DrBob222:D
*September 27, 2012*

**chemistry**

I got the right answer by following DrBob222's step
*September 27, 2012*

**Physics**

ghhyhjytuyjiuy
*September 19, 2012*

**SOCIAL STUDIES URGENT**

OK 1:D 2:C 3:D r they right
*April 30, 2012*

**SOCIAL STUDIES URGENT**

1. The Uros people have adapted to the geography of Lake Titicaca, much like the Incas, by making islands out of (1 point)rock. sand. wood. reeds. 2. The Selva refers to the (1 point)coastal region. eastern rainforest. high mountains of Peru. Sierra. 3. Another example of how ...
*April 30, 2012*

**Understanding percent**

In the square, if part A is 1/4 of the square and part C is 1/10 of the square, what percent of the square is part B?
*March 27, 2012*

**English**

Vinegar (by Roger McGough) sometimes i feel like a priest in a fish and chips queue quietly thinking as the vinegar runs through how nice it would be to buy supper for two (1967) Poem for Roger McGough (by Adrian Henri) A nun in a supermarket standing in the queue Wondering ...
*December 11, 2011*

**english**

Vinegar (by Roger McGough) Poem for Roger McGough (by Adrian Henri) sometimes A nun in a supermarket i feel like a priest standing in the queue in a fish and chips queue Wondering what it’s like quietly thinking To buy groceries for two. as the vinegar runs through (1967...
*December 11, 2011*

**Physics 203**

7890
*April 26, 2011*

**Chemistry**

How many moles of oxygen atoms are contained in 1.86 x 10-2 mol CuSO4·5H2O
*March 22, 2011*

**Algebra 1**

Nico drives from school to the store at 25 miles per hour. He drives back to the school (along the same route) at 35 miles per hour, and the returns to the store (via the same route) travelling at 40 miles per hour. Find the average rate for the three trips. Round your answer ...
*October 30, 2010*

**Organic Chemistry**

Benzyl chloride, through a primary halide, readily a precipitate when treated with 2% ethanolic silver nitrate. Why?
*October 25, 2010*

**math**

A ferris wheel is 35 meters in diameter,and can be boarded at ground level. The wheel turns in a counterclokcwise direction, completing one full revolution every 5 minutes. Suppose that a t=0 you are in the three o'clock position. Write a formula, using the sine function ...
*August 13, 2010*

**math**

sinx+ siny/ (cosx+cosy)= tan 1/2 (x+y) prove this identity
*August 13, 2010*

**enlgish**

Last night, lucy and Neil met Morey in Gramercy Park. 1. The object of the verb is.? 2. the predicate of the sentence is?
*September 2, 2009*

**French**

Is "je suis allé souvent" correct or should it be "je suis souvent allé?" Thanks
*January 4, 2009*

**psy**

OMG that is exaclty how I was feeling when reading the text. I know Im not stupid but when I read the explanations I do feel a little slow because I know its not that hard to figure out. So why do they make it something so easy seem difficult
*October 30, 2008*

**Precalculus with trigonometry**

09
*October 23, 2007*

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