Tuesday

December 6, 2016
Total # Posts: 1,063

**chemistry**

If a solution containing 0.22 M Cl -, Br -, I -, and CrO42- is treated with Ag+, in what order will the anions precipitate?

*September 23, 2011*

**Chemistry-help**

Hi, I have a question on Gas Chromatography(GC). The following were injected into the GC system: - 1) 1% sample solution in acetone 2) a 500 times dilution of item 1) The retention time of the main peak in the diluted sample solution 2) shifted by ~ 2min. The expected area ...

*September 19, 2011*

**Chemistry**

Convert 19.0cm cubed to meters cubed?

*September 19, 2011*

**Chemistry**

Chloroform is a liquid that is not soluble in water. It has a density of 1.498g/mL. Astudent mixed a sample of chloroform and a sample water and observed the result. Sketch what the student saw, and identify all components of the drawing. for a container, draw a test tube.

*September 19, 2011*

**Chemistry**

A 50.0mL sample of ethylene glycol had a mass of 55.505g. Find the density of ethylene glycol.

*September 19, 2011*

**maths**

an aeroplane flying at 600 km travels for 3 hours on a bearing of 310T how far north and how far wesr is it from its starting point after 3 hours

*September 19, 2011*

**Chemistry-please help**

Hi, I have a queestion on Gas Chromatography(GC). The following were injected into the GC systemk: - 1) 1% sample solution in acetone 2) a 500 times dilution of item 1) The retention time of the main peak in the diluted sample solution 2) shifted by ~ 2min. The expected area ...

*September 18, 2011*

**chemistry**

write the balanced chemical equation for the reaction that occurs when water is added to anhydrous BaCl2. would it be BaCl2+2H2o --> BaCl2+2H2O

*September 11, 2011*

**chemistry**

write the balanced chemical equation for the reaction that occurs when BaCl2.2H2O is heated.

*September 11, 2011*

**Algebra**

Solve the equation and check your answer (q+9)/5 + (q-2)/2 = 11/5

*September 11, 2011*

**Math - Calculus**

I do believe that all the denominators need to be the same to see the pattern. 2/3 is the same as 10/15 so the pattern looks like 10/15, 1/15, -8/15. Subtracting 9 from the top set of #'s

*September 11, 2011*

**math**

[-8+(-1)]+[8+(-6)]+(-6) Am I doing this right? I think I'm confusing myself please help... I have: [-8-1]+[8-6]-6 [-9]+[-2]-6 -11-6=-17

*September 9, 2011*

**math**

Thank you very much you have been great help!

*September 8, 2011*

**math**

My answer comes out to 0.141428571 and so on....what exactly is my answer do I need to round off or anything?

*September 8, 2011*

**math**

If a bag of chips has a serving size of 1 oz.(28g/about 32 chips), and serving per container is 7. So if the bag of chips costs 0.99, approximately how much does one serving of chips cost? Would I start out by 99/7? help!

*September 8, 2011*

**Math**

If a bag of chips has a serving size of 1 oz. and serving per container is 7. If the bag of chips costs 0.99, approximately how much does one serving of chips cost? would I start out by 99/7

*September 8, 2011*

**Math**

is this correct I2*100+3*10I= I200+30I=I230I

*September 8, 2011*

**English **

oh yeah thx that is true cuz Maleeka have low self esstem

*September 5, 2011*

**English **

thank you i was just making sure if that only theme

*September 5, 2011*

**English **

is bullying is the main theme for The Skin I'm In ??? if it not the only one then r they any other theme for it

*September 5, 2011*

**math**

We are learning inequalities and I just did some homework but the teacher returned it saying I did some of them wrong. 1. -2x - 10 < 2 2. -2x + 15 < 17 I didn't flip the inequality sign when I divided by (-2). But why do we always have to flip the sign when we ...

*September 4, 2011*

**science**

Just make an educated guess. how old are the old ones, how young are the young ones? It doesn't really matter what your hypothesis is, really. if you don't know the answer, you have to do an experiment to find out. that's the whole idea. PS. I don't think "...

*September 3, 2011*

**Simple math question!**

yep. if the question is 6-(2x)^3 then you need to cube 2x but in your question it's 6-2x^3 without the brackets so u only need to cube x.

*September 3, 2011*

**social **

Trust vs. mistrust (infancy)

*September 2, 2011*

**Chemistry**

For High Performance Liquid Chromatography (i.e. HPLC), can the column be flushed with Isopropanol (i.e. IPA)?

*August 24, 2011*

**Math**

Explain why the perimeter:Area ratio value can be used to understand cost effectiveness

*August 21, 2011*

**math**

Draw a rectangle with a perimeter of 58 m and an area of 120 m square

*August 21, 2011*

**Chemistry**

Help :) I got this Chem homework to research on the Taxonomy of Living Things and on the species to kingdom. Anyone can help where I can find this? :) Thank you

*August 13, 2011*

**Precalculus**

Awesome thanks mathmate!

*August 6, 2011*

**Precalculus**

I used that formula sin^2x+cos2x=1 -1/4 squared minus that by one and squareroot it square root of 15 over 4

*August 6, 2011*

**Precalculus**

dont you use the formula sin2 theta =2sintheta cos theta?

*August 6, 2011*

**Precalculus**

wait i don't understand how you did your math?

*August 6, 2011*

**Precalculus**

If sinx= -1/4 and x terminates in the third quadrant, find the exact value of sin2x My answer is sqrt-15/8

*August 6, 2011*

**Precalculus**

Find the exact value of sin 15°. I got square root of 2-squaroot of 3/2 is that correct?

*August 6, 2011*

**Precalculus**

120 degrees?

*August 6, 2011*

**Precalculus**

2-3cosx=5+3cosx 0 degrees is less than or equal to x less than or equal to 180 degrees Can you please show me step by step in detail. Please do not skip a step. Thanks!

*August 6, 2011*

**Precalculus**

oh i get it.... how do you know what identities to use? did you memorize them?

*August 6, 2011*

**Precalculus**

How would you solve this trig function: cos2x=sin^2-2 how do you know what trig identities to use?

*August 6, 2011*

**Precalculus**

Find cot x if sin x cot x csc x = .square root 2 After reducing i got cot= square root of 2 Am i correct?

*August 6, 2011*

**accounting**

A fleet of refrigerated delivery trucks is acquired on January 5, 2011, at a cost of $1,200,000 with an estimated useful life of eight years and an estimated salvage value of $100,000. Compute the depreciation expense for the first three years using the double-declining-...

*August 2, 2011*

**math**

d/dx x(1+y)^(1/2) + y(1+x)^(1/2)=0. Can some1 show me the calculation because i didn't get like the answer. [ans=-1/(1+x)^2 but my calculation=-(sqrt(y+1) (2 sqrt(x+1) sqrt(y+1)+y)/(sqrt(x+1) (2 sqrt(x+1) sqrt(y+1)+x)]

*July 22, 2011*

**calc 1**

Find the number c that satisfies the conclusion of the Mean Value Theorem. f(x)=x/(x+2) [1,4]

*July 5, 2011*

**physics**

i don't know

*June 29, 2011*

**government**

Each British colony was governed according to a _____, a written agreement between the settlers and the Crown laying down the colony's basic rules of government.

*June 16, 2011*

**Algebra**

find the vertex, line of symmetry, and minimum or maxium values of the quadratic equation f(x)=9-x^2

*June 15, 2011*

**calculus**

an object is dropped from a tower. the distance in t seconds is given by d(t)=4.9t^2 if the height of the tower is 146.9m , how fast is an object moving when it hits the ground??

*June 13, 2011*

**Random question**

Makee the world go awayyy do your remember when you loved meee... haha

*June 8, 2011*

**Random question**

thank you very much for your help

*June 8, 2011*

**Random question**

okay :/

*June 8, 2011*

**Random question**

Just doing a statistic here...can you name some of your favorite singers? Can be old or new.. Thanks!

*June 8, 2011*

**English**

From the depths of the ocean to the peaks of the mountains? does that make sense?

*June 8, 2011*

**English**

okay thanks!

*May 22, 2011*

**English**

When in disgrace with fortune and men's eyes I all alone beweep my outcast state, And trouble deaf heaven with my bootless cries, And look upon myself, and curse my fate, Wishing me like to one more rich in hope, [5] Featured like him, like him with friends possessed, ...

*May 22, 2011*

**English (poetry)**

But i thought personification is when something has human or animal characteristics?

*May 19, 2011*

**English (poetry)**

thanks! and is it in the last sentence "I hear it in the deep heart's core"?

*May 19, 2011*

**English (poetry)**

I will arise and go now, and go to Innisfree, And a small cabin build there, of clay and wattles made: Nine bean-rows will I have there, a hive for the honey-bee; And live alone in the bee-loud glade. And I shall have some peace there, for peace comes dropping slow, Dropping ...

*May 19, 2011*

**English (poetry)**

Thank you! :)

*May 19, 2011*

**English (poetry)**

IV His soul stretched tight across the skies That fade behind a city block, Or trampled by insistent feet At four and five and six o’clock; And short square fingers stuffing pipes, And evening newspapers, and eyes Assured of certain certainties, The conscience of a ...

*May 19, 2011*

**math**

24 divided by 4/5=??? I tried but i just could not get it.

*May 18, 2011*

**math**

9 divided by 1/6=??? I tried but I just couldn't get it!

*May 18, 2011*

**Math**

Find the sum: 7/12 + 7/10 =

*May 16, 2011*

**Algebra**

okay second onee.. 5x + 2y = 6 need to make y alone on the left side..so bring everything over to the right 2y=-5x+6 divide by 2 y=-5/2x +3 put that into calculator or graph it by hand... your y intercept is already given to you which is 3

*May 16, 2011*

**Algebra**

okay so heres what i got for the first one.. Triangle has to equal 180 degrees 1st angle= 2x-2 2nd angle= x 3rd angle= x+38 add them all together and equal it to 180 degrees in the end you would get 4x+36=180 solve for the equation and x is 36 now find the measure for each ...

*May 16, 2011*

**English**

Yes that's what i originally thought but my English teacher wrote this on my paper: If you were to need one you would write it like “Odysseus’”. When the word ends in an “s” you simply place the apostrophe after the ending “s”.

*May 13, 2011*

**English**

for the name Odysseus, if i want to add an s at the end do i have to write apostrophe before or after the s? Odysseus's family or Odysseus' family

*May 13, 2011*

**math**

convert 56.7 into degrees, minutes and seconds

*May 12, 2011*

**math**

convert 56.7 into degrees, minutes and seconds

*May 12, 2011*

**physics**

A mirror creates an image of magnification −1/3. (a) Is the image upright or inverted? (b) If the object is 7.75 cm tall, what is the height of the image? State your answer with the correct sign. answer to part B should be in cm. thanks.

*May 7, 2011*

**us history**

Passed in 1935, Roosevelt's most significant reform measure was the A. Wagner Act. B. Social Security Act. C. National Labor Relations Board. D. Fair Labor Standards Act.

*May 6, 2011*

**History**

Not true as in mind control is not a valid reason for cult conversion. Does that make more sense?

*May 5, 2011*

**History**

I was thinking maybe it could be something like this: While the effects of a cult are a matter of opinion, it is important to realize that "mind control" is more of an unclear and incorrectly named reason for cult conversion. I don't know if this makes sense or ...

*May 5, 2011*

**History**

For my history class I have to do a research report about a social topic and I want to talk about cults. My teacher said to choose one and I chose Heaven's Gate. At first I was going to talk about the harmful effects of cults but after researching it, it was hard to find. ...

*May 5, 2011*

**Math**

A locker combination has three nonzero digits, and digits cannot be repeated. The first two digits are 1 and 2. What is the probability that the third digit is 3?

*May 3, 2011*

**Math**

You choose a head coach and an assistant from a group of 12 applicants. How many different groupings are possible? I know it is either 24 for a double combination of 12 - or I was thinking for number of possibilities it could be 12x11 = 132? Can anyone help me decide what is ...

*April 28, 2011*

**social**

advertise what? networking like facebook, myspace is a free way to adverstise, plus they have pay for add options. One can create their own website, is that kind of what you are asking?

*April 28, 2011*

**algebra**

I know it is either 24 for a double combination of 12 - or I was thinking for number of possibilities it could be 12x11 = 132? This is my daughters 7th grade homework, and I am stumped on helping her.

*April 27, 2011*

**algebra**

You choose a head coach and an assistant from a group of 12 applicants. How many different groupings are possible?

*April 27, 2011*

**Chemistry**

Calculate the sodium ion concentration when 70 ml of 3.M sodium carbonate is added to 30 ml of 1.M sodium bicarbonate.

*April 26, 2011*

**Science**

You have the same liquid it cannot change.

*April 26, 2011*

**Chemistry**

You forgot to enter any of your values... if you copied this from ALEKS it won't include them. You have to type them in.

*April 15, 2011*

**chemistry**

What would be the mass of a bag of anhydrous magnesium sulfate, MgSO4, if it contained the same amount of magnesium as a 1.00kg bag of Epsom salts, MgSO4 x 7H2O? Give your answer in grams. please help

*April 11, 2011*

**chemistry**

iron+sulphur together are a mixture of small grains yellow and dark grey.Its chemical symbol is 'Fe + S'.When it reacts with oxygen they create a new chemical substance; Iron Sulphide. What do you put for 'explain the reaction using the Big Idea of Energy? :S HELP xxx

*April 10, 2011*

**physics urgent!!!**

A canoe of mass 70 kg with a paddler of mass 55 kg are in a river. If the river's current exerts a force of 15 N [E] while the paddler is paddling with an average force of 22 N [N38degreesW], find the acceleration of the canoe and paddler. Use both a component and ...

*April 7, 2011*

**physics**

A canoe of mass 70 kg with a paddler of mass 55 kg are in a river. If the river's current exerts a force of 15 N [E] while the paddler is paddling with an average force of 22 N [N38degreesW], find the acceleration of the canoe and paddler. Use both a component and ...

*April 7, 2011*

**physics**

A canoe of mass 70 kg with a paddler of mass 55 kg are in a river. If the river's current exerts a force of 15 N [E] while the paddler is paddling with an average force of 22 N [N38degreesW], find the acceleration of the canoe and paddler. Use both a component and ...

*April 6, 2011*

**Microbiology**

to solidify the media in order to obtain a pure colony

*April 6, 2011*

**english**

Which element of a short story would be most important to a story about a mad scientist stealing a secret weapon?

*April 6, 2011*

**Chemistry**

I have a question which asks... What is the Oxidation number of Nitrogen in Cu(NO3)2 I know the answer is 5+ but how do you get that?? Cu= 2+ O= 2- (Theres 3 of them so -2x3=-6...then, theres a two out of the brackets so 6- x 2 =-12) +2 - (-12)= -10? And then what? I think my ...

*April 6, 2011*

**Chemistry**

I have a question which asks... What is the Oxidation number of Nitrogen in Cu(NO3)2 I know the answer is 5+ but how do you get that?? Cu= 2+ O= 2- (Theres 3 of them so -2x3=-6...then, theres a two out of the brackets so 6- x 2 =-12) +2 - (-12)= -10? And then what? I think my ...

*April 6, 2011*

**Chemistry**

I have a question which asks... What is the Oxidation number of Nitrogen in Cu(NO3)2 I know the answer is 5+ but how do you get that?? Cu= 2+ O= 2- (Theres 3 of them so -2x3=-6...then, theres a two out of the brackets so 6- x 2 =-12) +2 - (-12)= -10? And then what? I think my ...

*April 6, 2011*

**8th grade science**

what contents in magma affects a volcanos explosive?

*March 28, 2011*

**physics**

at what altitude should a satellite be placed into circular orbit so that its orbital period is 48 hours? the mass of the earth is 5.976x10^24 kg and the radius of the eatrh is 6.378x10^6 m.

*March 23, 2011*

**physics**

a 1 kg mass is attached to a spring hanging vertically and hangs at rest in the equilibrium position. the spring constant of the spring is 1 n/cm. the mass is pulled downward 2 cm and released. what is the speed of the mass when it is 1 cm above the point from which it was ...

*March 23, 2011*

**History**

What aspects of Japanese culture were evident in samurai training?

*March 23, 2011*

**chemistry**

[h3o] = 1.78x10 ^-1 [OH] = 5.61x10^-3 pH= 11.75

*March 15, 2011*

**Science**

ANYONE?

*March 14, 2011*

**Science**

Sperm cells have very little cytoplasm, while egg cells have a lot of cytoplasm. How do these different structures support the different functions of eggs and sperm?

*March 14, 2011*

**Chemistry**

Can dimethylformamide be stored in plastic bottles? Or is it better to store in glass bottles?

*March 13, 2011*

**chemisty**

how many grams of magnesium sulfate are required to make 575 ml of a 1.65% (m/v) solution

*March 7, 2011*