Saturday

February 25, 2017
Total # Posts: 431

**College Chem**

Calculate the enthalpy change for the reaction NO(g) + O(g) --> NO2(g) from the following data: NO(g) + O3(g) --> NO2(g) + O2(g) ; ∆H = -198.9 kJ O3(g) --> 1.5O2(g) ; ∆H = -142.3 kJ O2(g) --> 2O(g) ; ∆H = 495.0 kJ

*May 8, 2011*

**chemistry**

how do I figure out if CO-2 is in a mixture of yeast, sugar and water?

*May 4, 2011*

**Biology project**

THE EVOLUTION OF BARBELLUS Describe the type of food that the diffrent Barbellus spieces might have eaten. 1.caterpillar 2 and 3.type of fish

*April 20, 2011*

**Social Studies**

Was Blitzkrieg a successfull war stratagy?

*April 19, 2011*

**physics**

Consider a single photon of red laser light, with wavelength of 633 nm (nano is 10-9). What energy does this carry? What momentum? How does the energy compare to typical atomic energies of a few times 10-19 J?

*April 17, 2011*

**Biology**

Cellular slime molds begin life as a group of separate organisms,or individuals.After congregation,they become a single multicellular individual.Describe what is meant by this statement.

*April 13, 2011*

**biology**

specialized cells in animals are all descended from a single ancestor cell.How are the specialized and the nonspecialized cells of the cellular slime molds related?

*April 13, 2011*

**English**

the mirror is an example of magic in the movie;they use it to see where belle's father is in the forest;also the fact that at the end true love saves the beast from the trajic spell and transforms into the handsome prince.

*April 13, 2011*

**social studies**

evaluate the following statement:canada's autonomy advanced in the first three decades of the twentieth century

*April 12, 2011*

**social studies**

evaluate the following statement:canada's autonomy advanced in the first three decades of the twentieth century

*April 12, 2011*

**spanish**

La hija tiene hambre

*April 2, 2011*

**Chemistry**

when sulfur is burned in the presence of oxygen, sulfur trioxide is produced. if 3.4 x 10^24 atoms of sulfur react, how many liters of sulfur trioxide are produced?

*March 17, 2011*

**physics**

680 N. If it were more of less, the man would fall through the floor. Hope this helps!

*March 16, 2011*

**Algebra 2**

If a bicycle has a crankshaft of 40 teeth, and there are three rear sprockets attached to the rear wheel, 20 teeth, 16 teeth and 12 teeth. The diameter of the rear wheel is 60 cm. Which sprocket should be used to get the most distance in one paddle? What would the distance be?

*February 22, 2011*

**Algebra**

If a bicycle has a crankshaft of 40 teeth, and there are three rear sprockets attached to the rear wheel, 20 teeth, 16 teeth and 12 teeth. The diameter of the rear wheel is 60 cm. Which sprocket should be used to get the most distance in one paddle? What would the distance be?

*February 22, 2011*

**calculus**

Find the derivate of the function f(x) = 2x2 + 23x + 5 What is the value of this derivative when x = 19

*February 17, 2011*

**calculus**

Find the derivate of the function f(x) = 2x2 + 23x + 5 What is the value of this derivative when x = 19

*February 17, 2011*

**business calculus**

For the function f(x) = 18/(3x-14) determine the x-coordinate of any vertical asymptote

*February 10, 2011*

**calculus**

For the function f(x) = 1/(6x2+5x+16) determine if there is a vertical asymptotes

*February 10, 2011*

**calculus**

For the function f(x) = 18/(3x-14) determine the x-coordinate of any vertical asymptote

*February 10, 2011*

**calculus**

A function f(x) is said to have a removable discontinuity at x=a if: 1. f is either not defined or not continuous at x=a. 2. f(a) could either be defined or redefined so that the new function IS continuous at x=a. Let f(x)= x2+10x+26 2 −x2−10x−24 if x−5...

*February 7, 2011*

**calculus**

Consider the function f(x)=4x3+2x2+5, and let c be a number in the interval [01]. For what values of k is there a c in this interval such that f(c)=k?

*February 7, 2011*

**calculus**

On the graph of f(x)=3sin(2x), points P and Q are at consecutive lowest and highest points with P occuring before Q. Find the slope of the line which passes through P and Q.

*February 4, 2011*

**calculus**

A mass is oscillating on the end of a spring. The distance, y, of the mass from its equilibrium point is given by the formula y=6zcos(10wt) where y is in centimeters, t is time in seconds, and z and w are positive constants. (a) What is the furthest distance of the mass from ...

*February 4, 2011*

**child day care**

was this right answer. thanks

*February 1, 2011*

**child day care**

1,c 2,c 3,b, 4,c 5,c 6,a 7,a 8,d 9,c 10,c 11,c 12,b 13,c 14,a 15,d 16,c 17,b 18,c 19,b 20,b

*February 1, 2011*

**Math**

Thanks math helper but I am more lost than before since my choices for an answer are 25pi m2, 166.67pi m2,33.3pi m2, 100pi m2 I don't know what I am missing here. I am sorry to bother you.

*January 18, 2011*

**Math**

Can someone please help me with my math homework problem? My mom tried but she doesn't understand it. What is the surface area of a right circular cylinder with base circle of radius of 5m and height of the cylinder 10m?

*January 18, 2011*

**Spanish**

si,lo puedo ver pero donde esta? i am a fluent speaker of spanish,italien,and portugeese i lived in central america

*January 12, 2011*

**AP Calculus AB**

1. assign x and y values to the length and width of each box within the pens, and use the formula 600=9x+8y to isolate the y value (i got the 8 and 9 by counting the number of length and width values existed in the diagram) you should get y=(600-9x)/8 2. then, since they asked...

*December 12, 2010*

**chemistry**

a mixture of methane and ethane is stored in a container at 294 mmHg. The gases are burned in air to form co2 and h2o. if the pressure of co2 is 357 mmhg measured at the same temperature and volume as the original mixture, calculate the mole fraction of the gases.

*December 4, 2010*

**business**

While waiting outside a meeting room, you notice that the next middle manager making a presentation is rehearsing what he will say. The pants zipper of his blue suit is open and part of his white shirt is protruding

*November 28, 2010*

**business**

You know that you have only $110 left before you hit the limit on your credit card, and you have $8 in your wallet. You are the host to three clients. One has just announced that he is considering the lobster dinner for $40. The other two clients nod their heads.

*November 28, 2010*

**business**

A colleague, an amateur pilot, shows up at a critical meeting with some Japanese executives wearing a tie adorned with pictures of a P51D Mustang escorting a B-29 Superfortress (the Mustang is a World War II fighter and the Superfortress is the type of plane that dropped the ...

*November 28, 2010*

**geometry**

It's always a square. 26/4= 6.5 :) There's your answer

*November 17, 2010*

**STOICHIOMETRY**

2Al + 3CuSO4 ! Al2(SO4)3 + 3Cu What is the maximum amount of Cu (63.5 g/mol) that could be produced by reacting 20.0 grams of Al (27.0 g/mol) with excess CuSO4?

*November 4, 2010*

**Philosophy**

Symbolize these arguments and display truth trees to evaluate the resulting argument forms for validity. If the argument form is invalid, describe (in English) the conditions under which the premises would be true but the conclusion false. 99.32 There will be scorpions in the ...

*October 22, 2010*

**Philosophy**

Prove informally, by employing correct definitions and principles of reasoning, that the following are true. 1/ Every formula implies itself. (That is, A implies A . Hint: For this one you will need to employ the definition of interpretation.) 2/ If set S implies formula A , ...

*October 22, 2010*

**Philosophy**

Construct natural deduction proofs for each of the following. 118.2 p&(q&r).'. q 118.4 .'. ¬(p&(q&¬p)) 118.10 q .'. ¬(¬p&¬q) 122.3* p " q, ¬p " r .'.¬q " r 122.7* p " q, ¬(p " r) .'. ¬(q " r...

*October 22, 2010*

**ital**

venti,ventuno,ventidueventitre,ventiquattro, venticinque, ventisei ventisette ventotto ventinove trenta I KNOW HOW TO SPEAK ITALIEN IF ANY MORE QUESTIONS FEEL FREE TO ASK

*October 20, 2010*

**Physics**

When will an object be in equilirium if different forces are acting on the object from the different systems? Would it be appropriate to use F=ma to find the equilibrium?

*October 9, 2010*

**College Chemistry**

what is the maximum weight of CuCl that can be prepared from the reaction sequence using 1.0g of Cu turnings to prepare the Cu2+ solution?

*October 7, 2010*

**College Chemistry**

how many grams of metallic copper are required to react with the number of moles of Cu2+ , 0.16mol, to form CuCl overall reaction can be taken as: Cu2+(aq) + 2 Cl- (aq) + Cu(s)-->2CuCl(s)

*October 7, 2010*

**College Chemistry**

The Cu2+ ions in this experiment are produced by the reaction of 1.0 g copper turnings with excess nitric acid. How many moles of Cu2+ are produced?

*October 7, 2010*

**Geographyand socity**

Owh wow....so 'Anonymous' what were you doing here if you weren't looking for answers???? Pshh your no better than us!

*October 5, 2010*

**Physics**

Small, slowly moving spherical particles experience a drag force given by Stokes’ law: where r is the radius of the particle, is its speed, and ç is the coefficient of viscosity of the fluid medium. (a) Estimate the terminal speed of a spherical pollution particle ...

*September 29, 2010*

**college**

Physical science

*September 19, 2010*

**college**

A car accelerates at a rate of 0.6 m/s2. How long does it take for this car to go from a speed of 55 mi/h to 60 mi/h?

*September 19, 2010*

**college**

A car accelerates at a rate of 0.6 m/s2. How long does it take for this car to from a speed of 55 mi/h to 60 mi/h?

*September 19, 2010*

**English**

But this is what authentic means? based on fact (cultural accuracy) reproducing essential features of an original (cultural accuracy) true to the creator's own cultural personality, spirit, or character (cultural immersion)

*September 18, 2010*

**English**

Is the book new shoes for sylvia authentic if so why?

*September 18, 2010*

**Ethics**

What evidence do you see of an ethical breakdown in Canadian society affecting all sectors (e.g., business, education, and government)?

*September 12, 2010*

**english check answer**

wary, inclination dilemma 9, irate 1o, reotrt

*August 28, 2010*

**algebra**

sqrt(36/81)=(sqrt36)/(sqrt81) =6/9 (6^2=36, 9^2=81) =2/3 (take out the common factor 3 from both the denominator and the numerator)

*June 16, 2010*

**GR.12 DATA MANAGEMENT**

I GOT IT!!!!!!! [10!/(2!2!) - (9!/2!2!)]+[(2)(10!/2!2!2!) - [(2)(9!/2!2!2!)]=1632960

*June 16, 2010*

**GR.12 DATA MANAGEMENT**

How many ways are there to arrange the word: MATHEMATICS, if the last letter can not be "H", and the first letter must be a vowel?

*June 16, 2010*

**algebra**

3m+2p=1.8 (qeuation A) 4m+6p=2.9 (equation B) "equation A" times "3": 9m+6p=5.4 (equation A') "equation A'" - "equation B": 5m=2.5 [m=0.5] substitude "m=0.5" into "equation A": 3(0.5)+2p=1.8 1.5+2p=1.8 2p=0.3...

*June 16, 2010*

**business**

You work as the manager of the second largest bank in your region of the United States. The bank's top management team has asked you to present an overview of how the current economy and financial changes have impacted your business and what changes must be made as a ...

*June 6, 2010*

**algebra**

how do you Simplify (d^3)(d^4)^5?

*June 3, 2010*

**algebra**

how do you solve this equation 3x2 + 6x + 3 = 0 ? what does x equal? and how do you factor this? 4ab + 2a + 6b + 3 Thank you SOO much for the help!

*June 3, 2010*

**English**

why don't you say: sitting and standing properly are crucial factors to maintaining a healthy back.

*May 3, 2010*

**chemistry**

A solution is made by adding 5.0 g Na2CO3 * 10H2O to enough water to make a 500 mL solution. what is the molarity. I have: M=mol solute/liter solution = (5/286)/.5 = .035M 286 is what i got for the molar mass of Na2CO3 * 10H2O Is that correct?? I think it is, but the next ...

*May 3, 2010*

**CHEMISTRY--URGENT**

oh, sorry! its 2 liters HNO3 and the answer is 11.65 so it would be: -log [(20 - 2e-8) / 4000] = 2.3 = [OH] 14 - 2.3 = 11.65 (without the rounding of the 2.3) why, though, would you subtract it from the other?

*May 2, 2010*

**CHEMISTRY--URGENT**

HNO3 with pH 3 is mixed with 2 L KOH with pH 12. assuming volumes are additive what is the pH of the final solution? I have absolutely no idea how to do this. I do know the answer, though. I have a test tomorrow and I would really appreciate it if someone could help!!!!

*May 2, 2010*

**Medical coding Insurance Math**

298

*May 1, 2010*

**9th Grade Social Studies**

Had the world gone along with Wilson’s plan to remove economic barriers between nations, what kind of place would the world be? Would it be better? Worse? How would you answer this question?

*April 23, 2010*

**CHEMISTRY--PLEASE HELP, URGENT**

A saturated solution of CaSO4(aq) is made in a beaker until there is excess calcium sulfate resting at the bottom. Then solid potassium sulfate is added. Which of the following is true? (The Ksp for potassium sulfate is larger than the Ksp for calcium sulfate) a. More calcium ...

*April 12, 2010*

**CHEMISTRY--PLEASE HELP, URGENT**

What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve in 500. mL of 0.01 M aqueous silver nitrate?

*April 12, 2010*

**chemistry--URGENT, PLEASE HELP**

What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a saturated solution in water? *For this one the formula is Ag2CrO4, which is [Ag]^2[CrO4]. I plugged x in for CrO4, so x^3 is equal to Ksp. I then got that x = 2.0e-4. However, that x is for CrO4...

*April 12, 2010*

**Chemistry (urgent)**

thank you so much!! I got a 100 on the test I was studying for!

*April 12, 2010*

**Chemistry (urgent)**

Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a saturated ...

*April 12, 2010*

**math-DUE TONIGHT PLEASE HELP**

The way to find the mean is by adding up all the different values and then dividing by the total number. If there are five numbers you can set up an algebraic equation like: x/5 = 61.8 then you can set up a new equation to solve for the height without the absent student: h/4...

*April 12, 2010*

**Chemistry**

Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a saturated ...

*April 12, 2010*

**2nd grade**

The main type of carbohydreat present in vegetable is as well as some and sugar

*April 11, 2010*

**home economics**

The explain of term porous

*April 11, 2010*

**home economics**

wath vegetabl content of

*April 11, 2010*

**home economics**

vegetable have a very high contentof

*April 11, 2010*

**biology**

Thank you!

*April 9, 2010*

**biology**

Which of the following statements about sexual and asexual reproduction is FALSE? a. Genetic diversity occurs in sexual reproduction. b. Asexually reproducing organisms can repair their own DNA. c. There are no special reproductive cells in asexual reproduction. d. A ...

*April 9, 2010*

**biology**

Thank you!

*April 9, 2010*

**biology**

When Darwin published his theory of evolution, he included all of the following ideas EXCEPT the idea that a. species changed slowly over time. b. some organisms become less suited to their environment then others. c. evolution occurs in spurts after major environmental ...

*April 9, 2010*

**geography**

Thank You!

*April 8, 2010*

**geography**

The factor that is forcing many South Asians to move to cities is a. religious conflict in rural areas. b. the threat of landslides in coastal areas. c. lack of arable land due to a growing population. d. dry conditions in the Indo-Gangetic Plain C?

*April 8, 2010*

**science**

Screw you SraMcGin, ciara asked for an answer not for another useless search engine that turns up useless websites

*April 4, 2010*

**language arts**

did i punctuate this sentence correctly? "They wanted to have the woman give birth to healthy babies, but they wanted to get as much work out of the woman as possible; therefore, the women were given lighter tasks."

*April 4, 2010*

**math**

int 1/ (sq rt (4sec^2 x +4)) dx trigonometric substitution expression: sq rt (x^2-a^2) substitution: x=a sec x identity: sec^2 x -1=tan^2 x

*March 4, 2010*

**math**

what is a like fraction? greatest common factor? unlike fractions?

*February 28, 2010*

**Language Arts**

I have an essay due tomorrow and it is required to have at least one adverb clause. I'm still a little confused about how to create an adverb clause. Help pleasee?!

*February 18, 2010*

**math**

what did the witty raindrop exclaim to all the others

*February 4, 2010*

**Organic chemistry**

its semi soluble.... it only dissolves if heated

*January 24, 2010*

**Pre- algebra**

66 2/3 of 120?

*January 12, 2010*

**Physics**

The initial velocity is 0 because it is starting in your hand, not moving

*December 26, 2009*

**health**

If a person has stopped breathing and is receiving pulmonary resuscitation, would it be better to administer pure oxygen or a mixture of oxygen and carbon dioxide? Why?

*December 17, 2009*

**health**

if a person has stooped breathing and is receiving pulmonary resuscitation, would it be better to administer pure oxygen or a mixture of carbon dioxide/oxygen?why?

*December 16, 2009*

**math**

how do you classify a number ( 5th grade stuff)

*December 3, 2009*

**science**

Explain why water is an important solvent in the environment.

*November 30, 2009*

**physics**

An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? I think the answer is B but not sure. a) That there is no reaction force-the net force on the object is ...

*November 23, 2009*

**physics**

A small particle of mass 2.0 x 10^-19 kg is attached to a nanofiber of relaxed length 0.50 nm (Recall that 1.0 nm = 10^-9 m) . The nanofiber is the black horizontal line-its attached to a substrate (an immovable wall) on the left. The plot is a graph of the force needed to ...

*November 23, 2009*

**physics**

An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the reaction force is zero ...

*November 22, 2009*

**physics**

A small particle of mass 2.0 x 10^-19 kg is attached to a nanofiber of relaxed length 0.50 nm (Recall that 1.0 nm + 10^-9 m) . The nanofiber is the black horizontal line-its attached to a substrate (an immovable wall) on the left. The plot is a graph of the force needed to ...

*November 22, 2009*