Wednesday

July 27, 2016
Total # Posts: 2,507

**Chemistry **

The decomposition of ehtane, C_2H_6, is a first-order reaction. It is found that it takes 212seconds to decompose 0.00839M C_2H_6 to 0.00768M. A. How long in minutes will it take to decompose ethane so that 27% remain B. What percentage of ethane is decomposed after 22minutes?
*December 25, 2010*

**Chemitry **

Thank you
*December 25, 2010*

**Chemitry **

I understand how to get the Constant but I don't get how you know that it is a 17% increase?
*December 25, 2010*

**Chemitry **

If he activation energy of a reaction is 4.86Kj, then waht is the percent increase in the rate constant of a raction when the temperature is increased from 45 to 75C
*December 25, 2010*

**math**

If you add 9 to me and then subtract 6, you get 7. What am I?
*December 21, 2010*

**stastics**

I'm having a hard time with question, can someone help me? A random sample of medical files is used to estimate the proportion p of all people who have blood type B. If you have no preliminary estimate for p, how many medical files should you include in a random sample in ...
*December 19, 2010*

**statistics**

Finish times (to the nearest hour) for 59 dogsled teams are shown below. Draw a histogram. Use five classes. 261 269 236 244 280 296 284 297 290 290 247 256 338 360 341 333 261 267 287 296 313 311 309 309 299 303 277 283 304 305 286 290 286 287 297 299 332 330 309 326 309 326 ...
*December 19, 2010*

**science**

The average solar radiation incident on the surface of the earth is about 1 KW/m2 for the entire year. A solar house is built with solar panels installed in the roof to provide the heating and electrical energy of the house. If the roof has a surface area of 100 m2 and the ...
*December 12, 2010*

**soc 120**

1 32
*December 12, 2010*

**Chemistry**

25.26 g
*December 11, 2010*

**adult education**

describe why it is important to consider each domain in the study of adult development, provide an example of how one domain of development impacts the other two.
*December 10, 2010*

**ant101**

How does the identification of cultural universals impact our understanding of what it means to be human? How does the search for universals help us better understand human cultural behavior? What examples from your own culture can illustrate the ideas that our behaviors are ...
*December 9, 2010*

**word problem**

bought a jumbo box of candy. by the time i got home kids ate 1/4 of candy. Put groceries away and another 1/2 of what was left was eaten. Before dinner ate another 1/6 of what was left. Now there are 10 candies left. How many chocolates were in the box to begin with.
*December 9, 2010*

**physics**

block a of mass 4kg is on a horizontal, frictionless tabletop and is placed against a spring of negligible mass and spring constant 650n/m. the other end of the spring is attacked to a wall. the block is pushed toward the wall until the spring has been compressed a distance x...
*December 6, 2010*

**physics**

A 0.280-kg volleyball approaches a player horizontally with a speed of 15.0 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.0 m/s. a)what impulse is delivered to the ball by the player? b)If the player'...
*December 5, 2010*

**language**

grendel is feared and hated because he: A)smells badly B) destroys crops C) eats men D) chases children.
*December 3, 2010*

**reimbisement methodologies**

You're an HMo director. you would like to ensure that your managed care plan is meeting industry standards. what is one way that you can do this?
*December 1, 2010*

**Finance**

A company issues a 6-year bond with a face value of 5,000 and semi-annual coupons payments of $275. Find the yield rate if the price of the bond is 6,500.
*November 28, 2010*

**Finance**

A company issues a 6-year bond with a face value of 5,000 and semi-annual coupons payments of $275. If the yield rate is 7%, find the price of the bond.
*November 28, 2010*

**Finance**

A company issues a 10,000 par value 10-year bond with 8% annual coupon payments. If the yield rate is 6%, calculate the price of this bond.
*November 28, 2010*

**general psychology**

What did Felicia do to cope with her sources of stress?
*November 28, 2010*

**medical billing and coding**

you work in a physcians office performing billing. You notice that guidelines haven't been followed accurately in completing the claim form. what will happen if you don't correct the claim form?
*November 28, 2010*

**6th grade**

rectangular prism: height 7 feet, width 4 feet and length 3 feet Find the volume Cylinder: radius 3.5 feet and height 7 feet Find the volume Van cargo space measures 8 feet tall by 5 feet wide by 13 feet deep. find the volume instruments will take up about 37 cubic feet Based ...
*November 27, 2010*

**math**

the dimensions of a rectangular prism are height 7 feet, width 4 feet and length 3 feet find the surface area part 2: dimensions of the cylinder are height 7 feet and radius 3.5 feet solve with a decimal then round to the nearest half foot. part 3 you have 1 gallon of paint ...
*November 27, 2010*

**english**

After completing the required readings for this week, discuss how you see the theme of creating art developing in the different stories and poems. What did you learn about the human impulse to create? Give examples from one of the stories and at least two of the poems that you...
*November 25, 2010*

**math**

If the total number of coins collected is $6.70 and the total number of nickels is .55, What is the fraction of nickels to the total number of coins?
*November 22, 2010*

**chemistry**

What is another way to write Fe or Ba electron configuration, charge,and number os unpaired e-?
*November 22, 2010*

**PHYSICS**

b) What is the acceleration at this instant?
*November 20, 2010*

**PHYSICS**

A 0.49 kg object is attached to a spring with a spring constant 167 N/m so that the object is allowed to move on a horizontal frictionless surface. The object is released from rest when the spring is compressed 0.12 m. Find the force on the object.
*November 20, 2010*

**algebra**

During the first part of a rip a canoeist travels 43 miles at a certain speed. The canoeist ravels 19 miles on the seond part of the trip at a speed 5 mph slower. The total time for the rip is 2 hours. What is the speed on each part of the trip?
*November 20, 2010*

**western experience**

In the nearly fifty years since the end of WWII, the continent of Europe has become more tightly integrated than ever before. What forces have made for this increasing unity, and what are the political landmarks that chart its path?
*November 9, 2010*

**chemistry**

what is the molarity of the solution if 0.135 g sodium sulfate in total volume of 175mL?
*November 8, 2010*

**algebra**

Kim brought a car 1,500.00.If the sales tax is %5,what will be the total that kim pay for the car?
*November 6, 2010*

**College Chemistry**

How many grams of BaCl2 are needed to make a 250mL of 15% solution?
*November 5, 2010*

**chemistry**

calculate the concentration of a silver ion when the solubility produc constant of AgI is 10 to the power of negative 16
*November 4, 2010*

**math**

how do i write this into an expression? 1/3 of a number
*November 3, 2010*

**Western Experience**

Why did the tide of WW2 began to turn in favor of the allies in 1942?
*November 2, 2010*

**Western Experience**

Thanks
*November 2, 2010*

**Western Experience**

why did the United States become so fearful of the Soviet Union after 1945? Why was the Soviet Union so fearful of the United States?
*November 2, 2010*

**Chemistry- please help ASAP!!!! thank you**

This is an old question, but I'm sure someone could benefit by this answer. You must reverse the 1st equation because you want S(rhombic) on the left and S(monoclinic) on the right in the end equation: S(rhombic) --> S(monoclinic) When you reverse a reaction, delta H ...
*October 31, 2010*

**logic**

Sometimes people get caught in a “downward spiral,” a case in which something leads to a result which in turn leads to more of the original thing, bringing on more of the result. As the process continues, the result continually gets worse and worse. An example is ...
*October 31, 2010*

**chemistry**

1.25 g of HClo3 has_____________ molecules (how many) ?
*October 28, 2010*

**chemistry**

1.25 g of HClO3 is _________ moles of molecules?
*October 28, 2010*

**chemistry**

0.058 moles of NH3 weighs how much grams?
*October 28, 2010*

**chemistry**

if the beaker was wet at the beginning of the experiment for the inital mass of the beaker, how would that affect the experimentally determined number of molecules of water in the hydrate?
*October 27, 2010*

**calculus problem**

Suppose and object is traveling directly from the earth to moon. The mass of the earth is 5.9742 x10^24 kg, the mass of the moon is 7.349 x 10^22 kg, and the mean distance from the earth to the moon is 384,000km. For an object between the earth and the moon, how far from earth...
*October 27, 2010*

**Western Experience : Since the sixteenth century**

Thank you Ms. Sue
*October 26, 2010*

**Western Experience : Since the sixteenth century**

How did imperialism impact non-western economies? How did Europeans achieve these transformations of local economies? What were the effects of those transformations?
*October 26, 2010*

**Western Experience**

yes Ms. Sue
*October 26, 2010*

**Western Experience**

in what ways did the alliance system, implemented to maintain a peaceful balance of power in Europe, in fact have the opposite effec?
*October 26, 2010*

**Chem**

Which of the following will be more soluble in an acidic solution than in pure water? 1.PbBr2 2.CsClO4 3.Cd(OH)2 4.Ag2(SO4) 5.BaSO3 How can I find which is which? Could you tell me the best way to find which one is more soluble? Thank you!
*October 26, 2010*

**Chem**

The question is; About Fe+2 concentration will Fe(OH)2 precipitate from a buffer solution that has a PH = 9.29? The Ksp of Fe(OH)2 is 4.87x10^-17 So here is what I did, Ksp = (x) (2x)^2 = 4x^3 4.87x10^-17 = 4x^3 x = 2.30x10^-6 I dont know what do I have to do after this. Plz ...
*October 26, 2010*

**physics**

Hurricanes can involve winds in excess of 120 km/h at the outer edge. Make a crude estimate of the energy of such a hurricane, approximating it as a rigidly rotating uniform cylinder of air (density 1.3 kg/m^3) of radius 120 km and height 4.5 km. Make a crude estimate of the ...
*October 26, 2010*

**Social Studies**

In what way is a state different from a country?
*October 25, 2010*

**chemistry 101**

the valve between a 3.00-L tank containing O2(g) at 6.00 atm. and a 5.00-L containing N2(g) at 1.20 atm. is opened. Calcualte the ratio of partial pressures (O2:N2) in the container?
*October 25, 2010*

**chemistry **

if k2O, SrO, and Al2O3 are all correct formulas, predict the formulas for the oxides of Rb, Mg, & Ga. i think the answers are Rb2O, MgO,& Ga2O3 but im not sure why
*October 23, 2010*

**Chem**

I stuck on this prob. Can you help me to do this? 10.00 mL of a solution containing 0.20 M NaCl and 0.25 M AlCl3 is introduced into a cation exchange column. How many moles of hydronium ions will be released by the column?
*October 22, 2010*

**alegbra**

one side of a triangle is three time the shortest side. The third side is 7 feet more than the shortest side. The perimeter is 62 feet. Find all three sides.
*October 20, 2010*

**English**

Could you tell me if these sentences are correct? I have to identify the linking verbs. 1. I have grown weary of television. 2. She has been late every day this week. 3. You should be hungry after all that work. 1=have grown 2=has been 3=should be
*October 20, 2010*

**Project topic ideas**

i have a question could i do a project on to encourage more people to vote
*October 20, 2010*

**Project topic ideas**

great i have an idea now
*October 20, 2010*

**Project topic ideas**

Any ideas on a public service activity for a project that can be done by interviews surveys phone conversations etc..
*October 20, 2010*

**math**

explain in words how to solve 39 + five squared - 96 * 7 / (9 - 4)
*October 18, 2010*

**Chem**

I stuck on this problem. Can you help me to solve it? A reaction mixture in a 3.67L flask at a certain temp. initially contains 0.763g H2 and 96.9g I2. At equilibrium, the flask contains 90.4g HI. Calculate the equilibrium constant(Kc) for the reaction at this temp. H2(g) + I2...
*October 17, 2010*

**calculus, please help **

A fish is reeled in at a rate of 3.2 feet per second from a point 10 feet above the water (see figure). At what rate is the angle between the line and the water changing when there is a total of 25 feet of line out? (Round your answer to three decimal places.)
*October 14, 2010*

**statistics**

what percentage of students studied between 30 and 40 hours? Range 10-50, Mean- 35, standard deviation-5.
*October 14, 2010*

**statistics**

What percentages of students studied 30 hours or less? These hours ranged between 10-50 hours with a mean of 35 and a standard deviation of 5.
*October 14, 2010*

**statistics**

What percentages of students studied 30 hours or less? These hours ranged between 10-50 hours with a mean of 35 and a standard deviation of 5.
*October 14, 2010*

**Business**

What are some of the operations management practices that can help bring manufacturing back to the U.S?
*October 14, 2010*

**calculus**

Thank you very much
*October 14, 2010*

**calculus**

please help if you can At a sand & gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 cubic feet per minute. The diameter of the base of the cone is approximately three times the altitude. At what rate is the height of the pile changing when ...
*October 14, 2010*

**Calculus**

How to simplify for ln(3+e^8)?? I thought It could be ln3+8. But it was wrong. Help me!
*October 13, 2010*

**math**

Complete the table: Input Output 3 7 4 9 0 1 7 ?
*October 12, 2010*

**6th grade math**

thanks
*October 12, 2010*

**math**

Sorry there is no x
*October 12, 2010*

**math**

what is the value of x in the equation? 2(b-3)+5=3(b-1) (may you solve it step by step.
*October 12, 2010*

**math**

y = 3 x^4 +5/4 x y'=
*October 12, 2010*

**math**

y = 3 t^6 − 7 √t + 9/t y'=
*October 12, 2010*

**Math**

thanks
*October 12, 2010*

**Math**

14 grams=__kg
*October 12, 2010*

**math**

its a her and Shonda is a lady. a)p=(24.95-0.8)n-575 b)p=(24.95+0.8)n+575 c)=24.95n-574.20 d)p=24.95n+ 575 and how?
*October 12, 2010*

**allied health**

D.
*October 12, 2010*

**Chem**

I got one more question. I tried to figure out what should it be. But still I don't have idea yet... Help me please.... The question is The expected absorbance range for the solutions to be tested is between 0.01 and 0.1. Describe what Simon will need to do to have ...
*October 12, 2010*

**Chem**

Then, What should be the unit for 9.625? I thought that is the absorbance. So I used nm unit which is for absorbance.
*October 11, 2010*

**Chem**

I have no idea What to do. What does it mean by 'draw what you think the visible range spectrum of this dye would look like.' To get the A, I used Beer's law. So I got 9.265nm for Absorbance. What should I do for the next? The question is ----Next Simon checks the ...
*October 11, 2010*

**math**

A new software company wants to start selling DVDs with their product. The manager notices that when the price for a DVD is 20 dollars, the company sells 139 units per week. When the price is 34 dollars, the number of DVDs sold decreases to 91 units per week. Answer the ...
*October 10, 2010*

**math**

A new software company wants to start selling DVDs with their product. The manager notices that when the price for a DVD is 20 dollars, the company sells 139 units per week. When the price is 34 dollars, the number of DVDs sold decreases to 91 units per week. Answer the ...
*October 10, 2010*

**math**

find the equation of the circle passing through (-1,2)(2,6)(6,3)
*October 10, 2010*

**Chem**

The experiment is about titration of vinegar with NaOH. Before I start titration, I need to calculate how much of vinegar I will want to be using. I think I might use 50ml of distilled water to mix vinegar and I am gonna drop 3drops of phenolphthalein as indicator. Please help...
*October 10, 2010*

**Chem**

Given that Kw = 2.4x10^-14 at 37 celsius, compute the PH of a neutral aqueous solution at 37 celsius, which is the normal human body temperature. Is PH = 7 solution acidic, basic, neutral at 37 celsius? Thank you!!!!!!
*October 9, 2010*

**chemistry**

Thank you, I was using the wrong one.
*October 8, 2010*

**chemistry**

I have tried using that equation but I keep getting 4.something. My answer should be around 9.
*October 8, 2010*

**chemistry**

do i work this out the same way i do a pH problem with one volume?
*October 8, 2010*

**chemistry**

.70 L of a buffer solution that is 0.120 M in NH3 and 0.450 M in NH4Cl are diluted to 5.80 L with distilled water. What is the pH of the buffer? Kb of NH3 = 1.8 x 10^-5
*October 8, 2010*

**math**

A new software company wants to start selling DVDs with their product. The manager notices that when the price for a DVD is 20 dollars, the company sells 139 units per week. When the price is 34 dollars, the number of DVDs sold decreases to 91 units per week. Answer the ...
*October 8, 2010*

**math**

Fabulous!!! Thank you so much!!! He's having trouble grasping the concept so I didn't want to confuse him!! Thank you thank you thank you!!!!
*October 7, 2010*

**math**

8999 = 9000 8999 = 9000 8999 = 9000 I'm helping my 3rd grader and I'm getting confused!! (sad part is, I do basic math everyday!! LOL) And thank you so much for all your help!
*October 7, 2010*

**math**

round to the nearest thousand, nearest hundred, nearest ten 8999
*October 7, 2010*

**math**

round to the nearest ten 3,490
*October 7, 2010*

**math**

Round to the nearest thousand, nearest hundred, and the nearest ten 7509
*October 7, 2010*