Wednesday

January 18, 2017
Total # Posts: 2,571

**Chemistry**

the following questions are about colligative properties: a)How much would the freezing point change in a 2.5 solution of phenol in benzene? b)how much would the boiling point change in a 1.m solution of magnesium chloride in ethanol? c)Does adding sugar to water raise or ...

*May 2, 2010*

**Chemistry**

In each of the following, determine how much solute (in g or mL) must be added to the correct quantity of water to make the given amount of solution at the correct concentration. a)KI to make 50.0mL of a 0.50 M solutioon b)12.0 M HCL to make 500 mL of a 1.0 M HCl c)Sucrose (...

*May 2, 2010*

**physics**

point a is located 0.25 m away from a charge of -2.1 x 10 -9 C. point b is located 0.50 m away from the charge. what is the electric potential difference Vb - Va between these two points?

*May 2, 2010*

**algebra**

A boarding kennel can hold 50 more cats than dogs. It can hold 200 dogs and cats. How many cats can it hold? a) 50 b) 125 c) 150 d) 75

*April 29, 2010*

**algebra**

Sara and her sister Emily both collect charms for the their charm bracelets. Together they have 42 charms. Emily has 2 more charms than Sara. To figure out the number of charms each girl has, you must first identify the conditions. What are the conditions of the problem? a) ...

*April 29, 2010*

**Chemistry**

What is the boiling point of each solution? a).50mol glucose in 1000g H2O b)1.50mol NaCl in 1000g H2O

*April 29, 2010*

**chemistry**

what is the freezing point of a solution of 12.0 g of CCl4 dissolved in 750.0g of benzene? the freezing point of benzene is 5.48 degrees C ; Kf is 5.12 degrees c/m.

*April 28, 2010*

**Chemistry**

You need to find the freezing point of a 1.50m aqueous NaCl solution. You calculate []Tf to be 1.86 degrees C/m x 3.00m or 5.86 degrees C. What is the temperature at which the solution freezes?

*April 27, 2010*

**Chemistry**

Calculate the grams of solute required to make the following solutions. a)2500g of saline solution (0.90% NaCl (m/m)) b)0.050kg of 4.0% (m/m) MgCl2

*April 27, 2010*

**socials studie 11**

explain why germans were so successful in warfare?

*April 27, 2010*

**social studies 11**

what is the significance of the mircale of dunkirk?

*April 27, 2010*

**chemistry**

An ice cube with a mass of 40.0 g melts in water originally at 25.0 degree C. a. How much heat does the ice cube absorb from the water when it melts. Report the answer in calories, kilocalories, joules b. Calculate the number of grams of water that can be cooled to 0 degreeC ...

*April 27, 2010*

**Chemistry**

Wouldnt it be 50mL/2550mL x 100 ??

*April 26, 2010*

**Chemistry**

What is the concentration, in percent (v/v) of a solution containing 50mL of diethyl ether (C4 H10 O) in a 2.5L of solution?

*April 26, 2010*

**physics**

two small objects, A and B, are fixed in place and separated by 3.00 cm in a vacuum. object A has a charge of +2.00 micro coulomb , and object B has a charge of -2.00 micro coulomb. how many electrons must be removed from A and put onto B to make the elecrtostatic force that ...

*April 26, 2010*

**physics**

Two particles, with identical positive charges and a separation of 2.60 x 10^-2 m, are released from rest. Immediately after the release, particle 1 has an acceleration a1 whose magnitude is 4.60 x 10^3 m/s^2, while particle 2 has an acceleration a 2 whose magnitude is 8.50 x ...

*April 26, 2010*

**physics**

Find the pressure difference on an airplane wing where air flows over the upper surface with a speed of 119 m/s, and along the bottom surface with a speed of 105 m/s. (b) If the area of the wing is 40 m2, what is the net upward force exerted on the wing?

*April 25, 2010*

**Chemistry**

can someone help me with part A of this question? Thank you so much

*April 25, 2010*

**Accounting**

Target corp is currently seeking additional capital to expand it's operation. Two companies have shown interset. The first company would like to have part ownership. Company 2 would like to provide target with a loan. Write a memo in which you explain what information from...

*April 24, 2010*

**chemistry**

Please help me with this question. Give the formula for calcium phosphate and then answer the following questions: (a)Calculate the percent composition of each of the elements in this compound. (b)If you knew that there was 50.0g of phosphorus in your sample,how many grams of ...

*April 22, 2010*

**Accounting**

you need a smaller useful life like 5 or 10 year then you take the salvage minus the cost of the van and then you divide that amount by the useful life. Here is an example $20,000.00- $5,000.00= $15,000.00/ 10years = $1,500.00 is the amount of depreciation. Hope this helps

*April 22, 2010*

**physics**

four identical metallic objects carry the following charges: 1.6, 6.2, -4.8, and -9.4 μC. the objects are brought simultaneously into contact, so that each touches the others. then they are separated. what is the final charge on each object? how many electrons (or protons...

*April 22, 2010*

**math**

(perimeter of my square) divided by ( sum of 2 side-lengths of my square)=

*April 21, 2010*

**ALGEBRA**

A convention manager finds that she has $ 1410, made up of twenties and fifties. She has a total of 48 bills. How many fifty-dollar bills does the manager have?

*April 21, 2010*

**Physics**

.38rad/s

*April 20, 2010*

**chemistry**

What is the Lewis Dot Diagram For Castor Oil?

*April 20, 2010*

**Chemistry**

How can the Tyndall effect be used to distinguish between a colloid and a solution? Can the presence of Brownian motion distinguis between a solution and a colloid? explain.

*April 19, 2010*

**ochem**

What's an equation of the hydrolysis of one ester group in tannins by CaCO3?

*April 15, 2010*

**marketing**

I have to understand the model and the factors when it comes to my product Nintendo Wii.

*April 14, 2010*

**marketing**

Describe the model of consumer buyer behavior. you must explain how the process works in the real world. Seclect one of the four factors influencing buyer behavior.

*April 14, 2010*

**organic chemistry**

What's an equation of the hydrolysis of one ester group in tannins by CaCO3?

*April 14, 2010*

**Chemistry**

Calculate the percent by mass of water in magnesium sulfate heptahydrdrate (MgSO4-7H2O)

*April 13, 2010*

**Chemistry**

Which of the following substances dissolve to a significant extent in water? Explain your answer in terms of polarity. a) CH4 b) KCL c)He d)MgSO4 e)sucrose f)NaHCO3

*April 13, 2010*

**Chemistry**

Calculate the percent by mass of water in magnesium sulfate heptahydrdrate (MgSO4-7H2O)

*April 13, 2010*

**calculus**

Thank you very much. I think somewhere between wrong slopes and a mix-up in the point-slope form equation, I messed up the equations. But I got it now. Thanks a lot!

*April 13, 2010*

**calculus**

Oops, for the interval of the first one it's [-5,2]. Typo.

*April 13, 2010*

**calculus**

Hi, I have online homework for calculus and I have to input two equations that will describe this graph. I have an image but Jiskha won't let me link to any websites... if this is allowed the URL to the image of the graph is img145.imageshack.us/ img145/1787/80193630 .png ...

*April 13, 2010*

**algebra**

solve by elimination 7r-3s=-17 3r+7s=59

*April 11, 2010*

**Economics**

If the government wanted to encourage a monopoly to produce the socially efficient quantity, should it use a per-unit tax or a per-unit subsidy? Explain how this tax or subsidy would achieve the socially efficient level or output. Among the various interested parties—the ...

*April 9, 2010*

**economics**

. If the government wanted to encourage a monopoly to produce the socially efficient quantity, should it use a per-unit tax or a per-unit subsidy? Explain how this tax or subsidy would achieve the socially efficient level or output. Among the various interested parties—...

*April 8, 2010*

**Math**

10 multiple choice questions each with three possible answers only one of which is correct. A student guesses the answer to every question. (a)What is the probability that the student will answer the first six questions correctly and the rest incorrectly? (b)What is the ...

*April 7, 2010*

**XECO 212**

How would I go about finding the answer to economists are quoted using normative statements in 2011?

*April 6, 2010*

**accounting**

Prepare adjusting journal entries for the year ended (or date of) December 31, 2005, for each of these separate situations. Assume that prepaid expenses are initially recorded in asset accounts. Also assume that fees collected in advance of work are initially recorded as ...

*April 6, 2010*

**Chemistry**

Lithium nitride reacts with water to form ammonia and aqueous lithium hydroxide. Li3N(s) + 3H2O(l) ==> NH3(g) + 3LiOH(aq) a)What mass of water is needed to react with 32.9g Li3N? b)When the above reaction takes place, how many molecules of NH3 are produced? c)Calculate the ...

*April 5, 2010*

**Chemistry**

Methanol (CH3OH) is used in the production of many chemicals. methanol is made by reacting carbon monoxide and hydrogen at high temperature and pressure. CO(g) + 2H2(g) ==> CH3OH(g) a) How many moles of each reactant are needed to produce 3.60 x 10^2 g CH3OH? b)Calculate ...

*April 5, 2010*

**Physics**

How much energy is needed to melt 0.225 kg of lead so that it can be used to make a lead sinker for fishing? The sample has an initial temperature of 27.3 degrees celsius and is poured in the mold immediately after it has melted. Not sure if this is relevant to finding the ...

*March 30, 2010*

**Physics**

How much energy is needed to melt 0.225 kg of lead so that it can be used to make a lead sinker for fishing? The sample has an initial temperature of 27.3 degrees celsius and is poured in the mold immediately after it has melted. Not sure if this is relevant to finding the ...

*March 30, 2010*

**geometry**

2 complementary angles are in the ratio of 5:13. Find the measure of each angle?

*March 28, 2010*

**Chemistry**

If 50.0 g of silicon dioxide is heated with an excess of carbon, 27.9g of silicon carbide is produced. SiO2(s) + 3C(s) --> SiC(s) + 2CO(g) what is the percent yield of this reaction?

*March 28, 2010*

**Chemistry**

When 84.8 g of iron(III) oxide reacts with an excess of carbon monoxide, iron is produced. Fe2O3(s) + 3CO(g) ==> 2Fe(s) + 3CO2(g) what is the theoretical yield of iron?

*March 28, 2010*

**HSM240**

I need an opinion please. My assignment says write 1,750- to 2,100-word proposal paper on a social program that you create. Pretend that you have the power and capacity to create an agency or organization and decide to create a new social program. Can you tell me if I am on ...

*March 27, 2010*

**medical -health**

you woek in the hospital's health information management department. part of your job is to assist the medical residents with completing records documenttation. one of the residents complains that he doesn't understand why insurance companies need so much documentation...

*March 16, 2010*

**ap physics**

work=20,580J power=686 watts

*March 14, 2010*

**History**

Which Native American tribe were the traditoinal alliis of New France

*March 12, 2010*

**Algebra**

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 1/5x -1/4 y = 3 2/5x + 1/2y = 2

*March 11, 2010*

**Statistics**

A card is picked at random from a pack of 20 cards numbered 1-20. given that the cards shows an even number, find the probability that it is a multiple of 4

*March 9, 2010*

**chemistry**

what mass of sodium acetate, NaCH3CO2, must be added to 1.0 L of 0.10 M acetic acid to give a solution with a pH of 4.50?

*March 9, 2010*

**Chemistry**

kilojoules to heat 250kg of gold from 18c to 184c

*March 8, 2010*

**science**

What is the net force of 25n downward and 45n upward?

*March 4, 2010*

**FINANCIAL MANAGEMENT FOR HUMAN SERVICE MANAGERS**

Explain your understanding of the two procurement strategies listed in the text. Which of the two procurement strategies is most effective for a human service agency? Explain your reasoning.

*March 4, 2010*

**2nd grade**

how do I count the vertices of a rectangle

*February 23, 2010*

**Organic chem**

methanol*

*February 20, 2010*

**Organic chem**

I just need some clarification regarding SN1 reactions Okay...so a reaction with a secondary ALKYL HALiDE + CH3OH (Methanal), why is the nucleophile CH3O? why doesn't it dissociate to give CH3 and OH?

*February 20, 2010*

**pre calc**

1. For the following functions listed below: (a) f(x) = -2cosx f(x) = 0.25sinx (b) f(x) = -3sin(2x+3)+7 f(x) = sinx + 4 Find : (i) the amplitude (ii) the period

*February 12, 2010*

**Math**

MISSING DIMENSION ROUND TO NEAREST TENTH.. QUESTION; THE SCALE OF A MAPIS 3in =6.82 mi map :_________ in actual 2.3 mi

*February 10, 2010*

**math**

The cargo area of the deck of a barge is 60 ft wide. Cargo containers are 7 ft wide, and can be placed side-by-side with a gap of 6 in between them. How many containers may be placed side-by-side on the deck of the barge?

*February 10, 2010*

**math**

The last-place finisher in the 2006 Nissan Golf Tournament won $9,078. How many tournaments would a person earning this much have to play in to reach $1 million?

*February 10, 2010*

**Math**

what type of example can you give me using the 3 quantities (amount, base and rate)given as to how to solve each when one is missing?

*February 10, 2010*

**history**

What were the names of Herbert Hoover's son's 2 pet alligators?

*February 7, 2010*

**English**

How does one cite from this form in APA form? I want to use something that would work for me but I don't know how to cite from this form. Please help.

*February 6, 2010*

**physics**

It's the anser in the book... Schaum's outline, college physics... 10th edition???

*February 3, 2010*

**physics**

What displacemtn at 70 degrees has an x-component of 450m? What is its y-component? I know the answers are 1.3 and 1.2... but don't know how to work it out?? PLEASE HELP!!

*February 3, 2010*

**11th grade**

What do you call a female bug that floats? it has to do with algebra. It shows you solutions and graphs. the graphs have letters in front of them so you can try and figure out what the answer is.

*February 3, 2010*

**Language Arts**

What are some articles on "Hate Crimes" do to Race, Religion, Sex, Ethnic Background...etc.?

*February 2, 2010*

**accounting**

What does a zero economic profict mean?

*January 31, 2010*

**biology**

3. In what cells do meiosis and mitosis take place? 4. If one strand of DNA, had bases ordered ATCCGTC, what would be the bases of its other strand?

*January 31, 2010*

**Accounting**

Selected transactions for D. Reyes, an interior decorator in her first month of business, are as follows. Jan. 2 Invested $10,000 cash in business. 3 Purchased used car for $4,000 cash for use in business. 9 Purchased supplies on account for $500. 11 Billed customers $1,800 ...

*January 29, 2010*

**Bus/210**

i need to know about a business scenario

*January 28, 2010*

**math**

excuse me? can you please help me with my math problems please? Thank You.

*January 27, 2010*

**math**

Karla borrowed $750 at 12 percent for one year. She paid a $20 processing fee. The interest paid will be $95.00, $92.50, or $90.00 Thus, the total finance charge (the interest plus the processing fee) will be? $115.00, $112.50, or $110.00 ? Therefore, to the nearest tenth, the...

*January 27, 2010*

**math**

Show that some problems have more than one answer by giving at least two answers to the following problem. What change would a restaurant cashier give someone for $1 if he used no more than four of any coin and no coin smaller than a nickel or bigger than a quarter?

*January 22, 2010*

**math 156**

is this statement (If you lay in the hot sun for 4 hours, you will become sunburned. Nicole is not sunburned. Therefore . . .) considered a affirming, hypothesis or denying conclusion?

*January 22, 2010*

**math 156**

If Ellen works overtime on Sunday or Wednesday night and Thursday night, she will earn enough money to buy a tennis racket. Does this give her two or three chances to earn enough money? Explain your reasoning.

*January 22, 2010*

**math 156**

give the statement in each sequence of statements: a.1/0.5=2 2/0.5=4 3/0.5=6 4/0.5=8 5/0.5=10 6/0.5=12? b.5x4=20 5x14=70 5x4=120 5x34=170 5x44=220 5x54=270?

*January 22, 2010*

**math 156**

name five problem solving strategies that are frequently used?

*January 22, 2010*

**math 7th**

9+2-(10x+2) Does the - before the parenthesis change the sign of the numbers inside of the parentheis? ie. Does 10x become -10x and does +2 become -2? Thanks!

*January 21, 2010*

**Algebra (9th grade)**

find 30% of 21.50 and subtract that from the 21.50. That is your sale price, then find 7% of the sales price and add it onto the sale price. That is your final price.

*January 21, 2010*

**Principles of Accounting**

Paid creditor $300 cash on balance owed.

*January 21, 2010*

**math**

What strategy did you use in solving this problem? 22. Suppose that you wanted to find the whole numbers represented by each of the letters in the following addition problem: Which problem-solving strategy might be most helpful to you in solving this problem? (You need not ...

*January 20, 2010*

**math**

Jennifer considered the numbers 4, 24, 44, and 64 and noticed that they all ended in 4 and that they can be divided evenly by 4, leaving no remainder. She concluded that all numbers that end in 4 can be divided evenly by 4. What type of reasoning did Jennifer use? Is her ...

*January 20, 2010*

**pre algebra**

the digits 0,1,2,3,4,5,6,7,8,9 are repeated in such a way thatwhen the digits repeat the greatest digit is removed the pattern is repeated indefinitely what is the 1111st digit in this pattern?

*January 19, 2010*

**physics**

A car travels 0.90 km at an average speed of 84.8 km/h and then 0.97 km at an average speed of 41.6 km/h. What is the car's average speed during the 1.87 km interval?

*January 15, 2010*

**english**

what is being said in the following line: “Foul devil, for God’s sake, hence, and trouble us not; For thou hast made the happy earth thy hell, Fill’s it with cursing cries and deep exclaims.”

*January 15, 2010*

**pre calc**

which one is the correct answer

*January 14, 2010*

**pre calc**

so that is the answer

*January 14, 2010*

**pre calc**

A square is drawn inside a square. Find the area of the square as a function of the radius of the circle.

*January 14, 2010*

**biology**

Organic compounds-a)carbohydrates b)lipids c)proteins d)nucleic acid (Explain what each organic compound is and why it is important to the cell)

*January 13, 2010*

**MAT 116 Week 6 quiz**

Identify the solutions of the system of equation if any -3x -4y=2 and 8y=-6x-4

*January 10, 2010*

**alg3**

how do i factor the perfect square trinomial 9x2-12x+4

*January 7, 2010*

**pre calc**

Find 2 functions defined implicitly by the given relations: (a) x² + y² = 25 (b) y² = x²

*January 4, 2010*