Thursday

July 2, 2015

July 2, 2015

Total # Posts: 1,345

**Chem**

Delta H = 2800 Kj Delta S = -260 J Delta Grxn = 2800-(15+273)(-260/1000) = 2874.88 Non-Spontaneous
*April 7, 2010*

**science**

ms.sue would it be compressional i am not really sure could you please tell me if i am right thank you
*April 2, 2010*

**science**

A wave that causes the particles of the medium to vibrate parallel to the direction the wave travels
*April 2, 2010*

**Physical Chemistry**

The presence of a catalyst provides a reaction pathway in which the activation energy of a certain reaction is reduced from 192 kJ·mol-1 to 72 kJ·mol-1. (a) By what factor does the rate of the reaction increase at 281 K, all other factors being equal? (b) By what...
*April 1, 2010*

**Math**

Find (if possible) the trigonometric function of the quadrant angle. sec 3pi/2 My answer was 0. Am I correct?
*March 30, 2010*

**Math(Please help)**

What is the domain? Use a graphing utility to determine the intervals in which the function is increasing and decreasing and approximate any relative maximum or minimun values of the function. g(x) = 12 Ln x / x My answer was: Domain = (12,0) decreasing = (3,-2) and ...
*March 30, 2010*

**NEED HELP! CHEMISTRY**

Three electrolytic cells containing solutions of CuNO3, Sn(NO3)2, and Fe(NO3)3, respectively, are connected in series. A current of 2.2 A is passed through the cells until 3.10 g of copper has been deposited in the cell. (a) What masses of tin and iron are deposited? found ...
*March 29, 2010*

**Math**

What is the domain? Use a graphing utility to determine the intervals in which the function is increasing and decreasing and approximate any relative maximum or minimun values of the function. g(x) = 12 Ln x / x My answer was: Domain = (12,0) decreasing = (3,-2) and increasing...
*March 29, 2010*

**Physical Chemistry**

Three electrolytic cells containing solutions of CuNO3, Sn(NO3)2, and Fe(NO3)3, respectively, are connected in series. A current of 2.2 A is passed through the cells until 3.10 g of copper has been deposited in the cell. (a) What masses of tin and iron are deposited? tin g ...
*March 29, 2010*

**Physical Chemistry**

i thought you were saying to divide by the 1 equivalent?
*March 29, 2010*

**Physical Chemistry**

so for the 1 equivalent weight of Ag i just divide molar mass 107.87 by 1.009 and get 106.8?? is the 1 equivalent weight in material in grams?
*March 29, 2010*

**Physical Chemistry**

A total charge of 97.4 kC passes through an electrolytic cell. Determine the quantity of substance produced in each of the following cases. (a) the mass (in grams) of silver metal from a silver nitrate solution ?g (b) the volume (in liters at 273 K and 1.00 atm) of chlorine ...
*March 29, 2010*

**Math(Help!!)**

What is the domain? Use a graphing utility to determine the intervals in which the function is increasing and decreasing and approximate any relative maximum or minimun values of the function. g(x) = 12 Ln x / x My answer was: Domain = (12,0) decreasing = (3,-2) and increasing...
*March 29, 2010*

**Math(Please help)**

use the given information to solve the triangle. C= 85 degrees 20' a = 35 c = 50 I know that I have to find A,B,b but I do not know how to do this.
*March 27, 2010*

**Math**

use the given information to solve the triangle. C= 85 degrees 20' a = 35 c = 50 I know that I have to find A,B,b but I do not know how to do this.
*March 27, 2010*

**physics**

A steam turbine operates between hot and cold reservoir temperatures of 538 degrees celcius and 92.1 degrees celcius respectively. If heat is supplied at a rate of 238 MW, what maximum amount of power could the turbine deliver?
*March 27, 2010*

**Math**

thanks!
*March 25, 2010*

**Chemisty/Bio**

Is a environment that is hypoxic or anoxic the same as acidic?? I am a little confused how the two relate to each other?
*March 24, 2010*

**physics**

A pigeon in flight experiences a force of air resistance given approximately by F=bv2, where V is the flight speed and B is a constant. A) In terms of SI units, what are the units for the constant "b"? B) What is the largest possible speed of the pigeon if its ...
*March 23, 2010*

**Math(Correction)**

Use the given function values and trigonometric identities (including the relationship between a trigonometric function and its cofunction of a complementary angle) to find the indicated trigonometric functions. sec Q = 5 tan Q = 2sqrt6 a) cos Q b) cotQ c) cot(90 degrees - Q) ...
*March 23, 2010*

**Math(Correction)**

Error
*March 23, 2010*

**Math(Correction)**

Use the given function values and trigonometric identities (including the relationship between a trigonometric function and its cofunction of a complementary angle) to find the indicated trigonometric functions. sec Q = 5 tan = 2sqrt6 a) cos Q b) cotQ c) cot(90 degrees - Q) d...
*March 23, 2010*

**Math(Correction)**

Use the given function values and trigonometric identities (including the relationship between a trigonometric function and its cofunction of a complementary angle) to find the indicated trigonometric functions. Sorry for the mistake. They are two seperate functions and i need...
*March 23, 2010*

**Math**

Use the given function values and trigonometric identities (including the relationship between a trigonometric function and its cofunction of a complementary angle) to find the indicated trigonometric functions. sec Q = 5 tan = 2sqrt6 a) cos Q b) cotQ c) cot(90 degrees - Q) d...
*March 23, 2010*

**grant preposals**

Distinguish between a project-wide evaluation plan and an objective-oriented evaluation plan.
*March 23, 2010*

**Pre-Cal(Please help)**

Error
*March 23, 2010*

**Pre-Cal (Please help)**

Identify any asymptotes of the graph. y = 1.08^5x I know that there is a horizontal asymptote but I do not know how to find it.
*March 22, 2010*

**Pre-Cal**

Identify any asymptotes of the graph. y = 1.08^5x I know that there is a horizontal asymptote but I do not know how to find it.
*March 22, 2010*

**Pre-Cal**

Identify the following features of the graph of g(x) = (3/2)^x+2 A) Asymptotes B) Intercepts C) Increasing or decreasing Once I graph this on my calculator, how can I find these?
*March 22, 2010*

**Pre-Cal**

Identify the following features of the graph of g(x) = (3/2)^x+2 A) Asymptotes B) Intercepts C) Increasing or decreasing I really do not know how to find these
*March 21, 2010*

**Pre-Cal**

Identify any asymptotes of the graph. y = 1.08^5x
*March 21, 2010*

**Pre-Calculus**

Identify the following features of the graph of g(x) = (3/2)^x+2 A) Asymptotes B) Intercepts C) Increasing or decreasing I really do not know how to find these
*March 21, 2010*

**Pre-Cal**

Find the inverse of the function f(x) = 3^x+2
*March 19, 2010*

**Math**

When graphing two linear equations, what is the significance of the intersection of the two graphs, and if there is no intersection?
*March 18, 2010*

**Chemistry**

So then because the valences are diff on each side that means its a redox reaction?? And so N gained eletrons does that mean it's the NO3 ^-1 that is the oxidizing agent or the N in NH3?? this stuff is tripping me up.....can ou explain it any more for me? sorry...im a ...
*March 18, 2010*

**Chemistry**

I'm having a hard time with Redox and how to figure out which is redox Select all of the reactions that are redox reactions. I) Ca + 2H2O Ca(OH)2 + H2 II) CaO + H2O Ca(OH)2 III) Ca(OH)2 + H3PO4 Ca3(PO4)2 + H2O IV) Cl2 + 2 KBr Br2 + 2 ...
*March 18, 2010*

**Chemistry**

I think these I know how to do ....just want someone to check..still sorta mixed up on teh first question. Thanx For the following reaction, what is the correctly balanced reduction half-reaction? Fe(OH)3(s) + Cu(s) → Fe(s) + Cu+(aq) + OH-(aq) A. e- + Fe(OH)3(s) → ...
*March 18, 2010*

**Chemistry**

I'm having a hard time with Redox and how to figure out which is redox Select all of the reactions that are redox reactions. I) Ca + 2H2O Ca(OH)2 + H2 II) CaO + H2O Ca(OH)2 III) Ca(OH)2 + H3PO4 Ca3(PO4)2 + H2O IV) Cl2 + 2 KBr Br2 + 2 KCl...
*March 18, 2010*

**Calculus**

z=2 square root of 2
*March 17, 2010*

**English**

He hurt his fist trying to open the window.
*February 25, 2010*

**Math**

Find the coordinates of the turning point and determine wether it is minimum or maximum. y=xlnx-2x The answer in the book says the co-ordinates are (e,-e), the closest I have come is (1/lnx,-1/lnx) which works if 1/lnx=e, but I dont think that it does. This question is in ...
*February 25, 2010*

**Chemistry**

How do I know which of these .1M solutions will have a pH less than 7? KF, NH4I, NaH2PO4, Fe(NO3)3 I am guessing all but KF is acidic...but if someone could confirm this and explain why that would be helpful
*February 24, 2010*

**P. Chemistry **

If given the Ka or Kb and pKa and pKb, how do you find the initial concentration of a weak acid/base in a solution given the pH? Is there an equation for this? I can't find anything in my notes and am not sure what to look for.
*February 23, 2010*

**P. Chemistry **

A student added solid K2O to a 750.0 mL volumetric flask. The solid was dissolved in water and then the flask filled with water to the mark. This formed 750.0 mL of the initial KOH solution. 20.0 mL of the initial solution was transferred to another flask and diluted to 200.0 ...
*February 23, 2010*

**Accounting**

2. b
*February 22, 2010*

**physisc! URGEENT**

The current is 1.9 m/s. A person can swim 0.7 m/s. What is the best angle for the swimmer so that it is swept downstream the shortest distance possible?
*February 21, 2010*

**Mega Stat**

How do you know the p-value on megastat. On minitab It looks like it gets a different p-value than megastat. I got a number from megastat of 2.35E10 and on minitab it was 0.000.
*February 20, 2010*

**statistics**

How do you know the p-value on megastat. On minitab It looks like it gets a different p-value than megastat. I got a number from megastat of 2.35E10 and on minitab it was 0.000.
*February 20, 2010*

**science**

describe a pond and indicate the types of interdependence of living things in it
*February 18, 2010*

**science**

describe a pond and indicate the types of interdependence of living things in it
*February 18, 2010*

**Chem**

When 0.10 g of insulin is dissolved in 0.200 L of water, the osmotic pressure is 2.30 Torr at 20°C. What is the molar mass of insulin? I tried using the van't hoff equation, converting Torr into atm; but not sure how to do it. my teacher didn't really explain this ...
*February 15, 2010*

**statistics**

Number sampled is 1,000 and mean is 7.2 on a scale from 1-10 how do I determine standard deviation. Can we answer this with using the sampling distribution of the sample proportion?
*February 13, 2010*

**statistics**

If sample number is 1,000 and mean is 7.2 on a scale from 1-10 how do I determine standard deviation.
*February 13, 2010*

**MA 005**

The width of a rectangle is 3ft. less than the length. The perimeter is 62ft. Find the length and the width od the rectangle.
*February 12, 2010*

**criminal justice**

During the middle Ages, defendants could avoid serving a harsh penalty if they were granted
*February 8, 2010*

**business**

Explain the difference between fiscal policy and monetary policy. Discuss how each of these approaches can be used to influence the state of the economy.
*January 31, 2010*

**algebra**

Joe's larger tank is completely filled with water. He takes water from it to completely fill the small tank. Determine how many cubic inches of water will remain in the larger tank The larger tank is 12 x 30 x 16 and the smaller tank is 6 x 12 x 9.
*January 30, 2010*

**Math**

The average of a set of five different positive integers is 360. The two smallest integers in the set are 99 and 102. What is the largest possible integer in this set?
*January 29, 2010*

**math**

(5)(3/5)(x+2)=(5)(x-4) 3(x+2)=(5)(x-4) 3x+6=5x-20 3x+6+20=5x-20+20 3x+26=5x 3x-3x+26=5x-3x 26=2x x=13
*January 29, 2010*

**Physics **

A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 7.10 seconds later.
*January 28, 2010*

**Physics**

A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 7.10 later. What was the rocket's acceleration?
*January 28, 2010*

**math**

find all possible values of x such that, when the five numbers x, 14, 11, 6, 17 are arranged in order, the mean is equal to the median
*January 28, 2010*

**math**

find all possible values of x such that, when the five numbers x, 14, 11, 6, 17 are arranged in order, the mean is equal to the median
*January 28, 2010*

**fallacy**

It takes someone with a really big heart to give to our charity , and you seem like someone who cares more than most . ...
*January 17, 2010*

**business**

Thank you Ms.Sue, for the resource.
*January 16, 2010*

**business**

I need help with this question whats the social and cultural customs that Walt Disney could encounter overseas?
*January 16, 2010*

**business and tech**

What are some advantage of globalization?
*January 13, 2010*

**MATH **

What percent of 49 is 7
*January 12, 2010*

**MATH **

25 is what percent of 365? What percent of 128 is 24
*January 12, 2010*

**Math**

What percent of 185 is 35?
*January 12, 2010*

**algebra**

solve each system using elimination x+4y=12 and 2x-3y=6
*January 12, 2010*

**Math**

Could someone Please tell me how to go about doing these two problems. Thank You.
*January 12, 2010*

**Math**

Multiple Choice: Mary Jane gets a student rate of $27.50 a month for health insurance. There is a $200.00 deductible, but no coinsurance payment. She recently received treatment for a covered condition. The bill was $2,350.00 Mary's insurance company provided payment of 80...
*January 12, 2010*

**chemistry**

F is not he right answer
*January 11, 2010*

**business and tech**

lets say that price gauging didn't happen,and the merchants sell the goods at the market price but with laws of supply and demand how would that be a good thing, When disasters hit an area, the cost of everything seems to go up immediately?
*January 11, 2010*

**business and tech**

lets say that price gauging didn't happen,and the merchants sell the goods at the market price but with laws of supply and demand how would that be a good thing?
*January 10, 2010*

**business and tech**

I need help on this question. "When disasters hit an area, the cost of everything seems to go up immediately: food, water, housing, gas and so forth. Explain why this phenomenon may be a good thing, using the laws of supply and demand". thank you very much
*January 10, 2010*

**Algebra 1**

1.c 2.b 3.b 4.c 5.c
*January 10, 2010*

**SCIENCES**

TEN EXAMPLES OF SUSPENSION AND SOLUTION MIXTURES.
*January 7, 2010*

**8th grade**

The area of a rectangle is 45cm2. The height is one less than two times the base. what is the length of the base
*January 4, 2010*

**Algebra Word Problems**

Children + adult = total receipts $1.00(x) +$3.00(350-x) = $750 solve for x=>>>> number of children tickets, 350- "x" =>>>adult tickets
*December 15, 2009*

**calculus**

Given x+xy+2y^2=6 find the coordinates of all other points on this curve with slope equal to -1/3. Please show work.
*December 10, 2009*

**english**

To what extent is romeo a weak character
*December 9, 2009*

**algebra**

5{[4(n-4)+18]-[3(5n-3)+5]}= simplify the answer
*December 9, 2009*

**Calculus**

Two bacteria colonies are cultivated. The first colony has a doubling time of 2 hours and the second a doubling time of 3 hours. initially, the first colony contains 1,000 bacteria and the second colony 3,000 bacteria. At what time t will sizes of the colonies be equal? Is ...
*December 6, 2009*

**chemistry.**

When 41.81 of a solution of aqueous sliver ions with a concentration of 0.2040 mol dm3 is added to a solution of XO-3/4 ions, 1.172g of the precipitate is formed? ..Can any one help me with that! NB: -3/4 mean that 3 is up and 4 is under it.
*December 3, 2009*

**calc**

a) Suppose f(x) is defined on 0 ≤x≤1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales for x and for y. Use a graphical ...
*December 1, 2009*

**calc**

a) Suppose f(x) is defined on 0 ≤x≤1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales for x and for y. Use a graphical ...
*November 30, 2009*

**Math**

How tall is a cylinder that has a volume o 2,123 cubic meters and a radius of 13 meters?
*November 19, 2009*

**Statistics**

h t t p : / / t i n y u r l . c o m / y f z j y u o I'm not sure how to do #2.
*November 19, 2009*

**Math**

Everyone in Mrs.Bowman's art class has 8 jars of paint except Jerome, who has 10. There are 74 jars of paint in the room. How many students are there in Mrs. Bowman's art class.
*November 17, 2009*

**math**

For fall festival, Mrs. Marco bought 6 bags of Golden Delicious apples. She handed out 43 apples and had 5 left over. How many apples were in each bag.
*November 17, 2009*

**Physics-Astronomy**

A high-velocity star HVS 1 is moving at 600 km/s, 0.2% speed of light. Assuming the HVS 1 is moving away from us, and that its velocity is oriented entirely along our line of sight, determine the Doppler shift of the Ha spectral line (6562.8 Angstrom) produced by this star. Is...
*November 16, 2009*

**Physics-Astronomy**

Hello, I have no idea how to do the following question. Any help would be appreciated: An energy of at least 13.6 electron-volts is required to ionise a hydrogen atom. What is the longest wavelength of electromagnetic wave capable of ionising hydrogen? And which regions of the...
*November 16, 2009*

**Readind and writing number**

I am 55 yr old can get help
*November 12, 2009*

**world history**

my book does not talk about that can you help me with some websites that might help me
*November 11, 2009*

**world history**

thank you :D and what did both countries offer each other
*November 11, 2009*

**world history**

middle ages
*November 11, 2009*

**world history**

how did cultural diffusion occur between Europe and Asia?
*November 11, 2009*

**physics**

2. A rifle is fired horizontally and travels 980 m. The rifle barrel is 6.1 m from the ground. What speed must the bullet have been travelling at? here i got a time of 201.24.. i then added the 980m to the 6.1m and put it in the x=vt equation to get a velocity of 69.49
*November 9, 2009*