Wednesday

May 27, 2015

May 27, 2015

Total # Posts: 266

**Chemistry**

Hi, Please provide assistance on the following problem. I worked out part of it, but do not know what to do after calculating pH for HCl. Suppose you dissolved 0.0365 grams of HCl in water to give a final volume of 10.0 mL. The molar mass of HCl is 36.5 g/mole and the molar ...
*March 19, 2012*

**Algebra**

Help please (x^3 + 3x^2 - 2x+7)/(x+1)=11 I don't how how to solve this at all-the answer should be 11 but I don't have a clue how to get it-please show me this one so I can hopefully do my homeowrk-we did this in class today but I don't understand it
*March 7, 2012*

**Math**

A restaurant owner has a luncheon special that consists of a cup of soup, half of a sandwich, and a beverage. She wants to advertise that a different luncheon of three items can be purchased 365 days of the year for $4.99 apiece. If she has 7 different kinds of soup and 6 ...
*February 26, 2012*

**Chemistry**

The reaction 2NO2--->2NO+O2 has the rate constant k= 0.68 m-1s-1. If the initial concentration of NO2 is 9.30×10−2 M, how long it would take for the concentration to decrease to 2.00×10−2 M ? please answer and show the steps
*February 9, 2012*

**Physics**

Are you serious? If I knew how to get started I wouldn't be here. There are actually 2 more parts to the question that I didn't even post, because I just needed help with the first part. And for the record my name is Jeremy.
*February 7, 2012*

**Physics **

An enemy ship is on the western side of a mountain island. The enemy ship can maneuver to within 2520 m of the 1850 m high mountain peak and can shoot projectiles with an initial speed of 260 m/s. If the eastern shoreline is horizontally 305 m from the peak, what is the ...
*February 7, 2012*

**CHEMISTRY**

At ordinary body temperature (37 C) the solubility of N2 in water in contact with air at ordinary atmospheric pressure (1.0 atm) is 0.015 g/l. Air is approximately 78 mol % N2. a)Calculate the number of moles of N_2 dissolved per liter of blood, which is essentially an ...
*February 7, 2012*

**math**

what are you asking? if you are asking 45 and 1/5 times 3/4, then the answer is 33.9
*February 6, 2012*

**Chemistry**

Thank you!!!!
*February 6, 2012*

**Chemistry**

At ordinary body temperature (37 C) the solubility of N2 in water in contact with air at ordinary atmospheric pressure (1.0 atm) is 0.015 g/l. Air is approximately 78 mol % N2. a)Calculate the number of moles of N_2 dissolved per liter of blood, which is essentially an aqueous...
*February 6, 2012*

**Chemistry**

A dilute aqueous solution of an organic compound soluble in water is formed by dissolving 2.35 g of the compound in water to form 0.250 L solution. The resulting solution has an osmotic pressure of 0.605 atm at 25 Celsius. Assuming that the organic compound is a nonelectrolyte...
*February 6, 2012*

**Physics **

You are driving south on a highway at 24.0 m/s (approximately 54 mi/h) in a snowstorm. When you last stopped, you noticed that the snow was coming down vertically, but it is passing the windows of the moving car at an angle of 26.6° to the horizontal. Calculate the speed ...
*February 5, 2012*

**Chemistry**

How many grams of sulfur (S8) must be dissolved in 100.0 naphthalene (C10H8) to make a 0.13 solution? answer in grams.
*February 3, 2012*

**Chemistry**

Which is more soluble in water: HCl or ethyl chloride?
*January 30, 2012*

**Chemistry**

Which is more soluble in water: propionic acid or sodium propionate?
*January 30, 2012*

**Chemistry**

which is more soluble in water: cyclohexane or glucose?
*January 30, 2012*

**physics**

the brake linings of the wheels of a car have total mass 4.8kg and specific heat capacity 1200 J kg -1 K-1. calculate the maximum possible temperature rise of the brake linings when the car (of mass 800kg) travelling at 15 ms-1 is brought to rest by applying the brakes.
*January 25, 2012*

**Chemistry**

Gasoline is a mixture of hydrocarbons, a major component of which is octane,CH3CH2CH2CH2CH2CH2CH2CH3. Octane has a vapor pressure of 13.95 torr at 25 degrees celcius and a vapor pressure of 144.78 torr at 75 degrees celcius. Use these data and the equation in part (a) to ...
*January 25, 2012*

**math**

$166
*January 25, 2012*

**Chemistry**

By using the Clausius-Clapeyron equation,lnP=Hvap/RT +C , derive the relationship between the vapor pressures,P1 and P2, and the absolute temperatures at which they were measured,T1 and T2 .
*January 25, 2012*

**bshs 402**

1. What are four alternative theoretical approaches to personal helping listed in your text? 2. What are four basic steps identified by Parad, Selby and Quinian (1976) in crisis intervention that are designed to help the client return to pre-crisis level of functioning? 3. ...
*December 12, 2011*

**physics**

A diver jumps horizontally off a cliff with an initial velocity of 5.4 m/s. The diver strikes the water 4.5 s later. What is the vertical velocity of the diver upon reaching the surface of the water?
*November 21, 2011*

**math**

tell which place value positions need to be regrouped after mutiplying a single digit and 2 digit number like 3x29
*November 15, 2011*

**physics**

The brick shown in drawing the is glued to the floor. A 3500-N force is applied to the top surface of the brick as shown. If the brick has a shear modulus of 5.4 109 N/m2, how far to the right does the top face move relative to the stationary bottom face?
*November 13, 2011*

**Physics**

When a quarter, a nickel, a penny, and a dime are flipped; what are each of their revolutions per minute?
*November 7, 2011*

**physics**

A fighter pilot dives his plane toward the ground at 485 m/s. He pulls out of the dive on a vertical circle. What is the minimum radius of the circle, so that the normal force exerted on the pilot by his seat never exceeds three times his weight?
*October 25, 2011*

**English**

I'm writing an essay involving analysis of a short story. I need to put in-text citations after quotes, etc. The short story was read online so there is no page number, etc. How do I cite this-I'm really confused. I looked in Purdue Online Writing Lab but that's ...
*October 2, 2011*

**Marketing**

Pick a product or service and explain the nature of consumption by Hispanic, African American, or Asian consumers. Why does consumption differ from the other groups? You are required to find 2 sources to support your paper (newspaper articles, books or academic articles).
*October 2, 2011*

**fourth grade math**

40o,000
*September 14, 2011*

**geometry**

Suppose line PQ has endpoints P(2,3) and Q(8,-9). Find the coordinates of R and S so that R lies between P and S and line PR is congruent with Line RS which is congruent with line SQ
*September 5, 2011*

**math/algebra**

solve x^2 + x - 12 = 0 quadratic formula??
*September 3, 2011*

**Geometry**

Balls
*August 28, 2011*

**IT**

I have asked my teacher for help several times but keep getting pathetic feedback. I will show you first what is expected from the assignment. He says that a five paragraph format is a great way to complete the essay but my paper has three sistuations I need to cover and the ...
*August 4, 2011*

**geometry**

find the volume of a pyramid with a length of 1.7 m, a width of 0.9 m, and a height of 2 m.
*June 13, 2011*

**geometry**

find the surface are of cylinder with a radius of 5 m and a height of 8 m. Use 3.14
*June 13, 2011*

**Math**

The exchange rate for the Australian dollar in January 2000 was AU$100 = S$x. In June 2000, the exchange rate had become AU$100 = S$(x-5). Karen found out that she could get an extra AU$32 for every S$672 that she exchanged in June compares to January. Form an equation in x ...
*May 16, 2011*

**math**

what is the answer to What Do You Get if a Bunch of Bad Guys Fall in the Ocean?
*April 25, 2011*

**Physics**

A ray of light hits a side of Lucite ( n = 1.5) prism at 50 degree. Assuming that the nearest vertex has an angle of 70 degrees, what is the angle of light that leaves the prism.
*April 25, 2011*

**world history**

what combination of food did the polyneatians introduce to the island that they colonized
*April 22, 2011*

**Physics**

A 975 N object is pulled at a constant velocity up an incline with a force of 327 N parallel to the incline as shown in the diagram. Assume that the difference between the work output and the work input is the work required to overcome friction. a) what is the force of ...
*April 12, 2011*

**physics**

p = w/t<br> 105 = w/3.2 <br> Solve for w is your answer!
*April 12, 2011*

**physics**

A 975 N object is pulled at a constant velocity up an incline with a force of 327 n parallel to the incline as shown in the diagram. Assume that the difference between the work output and the work input is the work required to overcome friction. a) what is the force of ...
*April 12, 2011*

**Physics**

a 975 N object is pulled at a constant velocity up an incline with a force of 327 n parallel to the incline as shown in the diagram. Assume that the difference between the work output and the work input is the work required to overcome friction. a) what is the force of ...
*April 12, 2011*

**Chemistry**

20cal/degrees C
*March 24, 2011*

**math**

(2x+3)/(3x-6) = (5x+3)/(5x - 9)
*March 5, 2011*

**math**

|\ | \ 5 |-x-\ | \ | -y- \ 5 | \ | \ 8 |-------10---\
*March 5, 2011*

**Math**

A picture measures 20 cm x 25 cm. The width of the matting and frame at the top and bottom is 5cm. What should be the dimensions of the frame so that the framed picture is similar to the picture alone
*March 5, 2011*

**Math**

They mean absolute value. It means that anything in between them is positive. so -60 would turn to 60.
*February 18, 2011*

**geometry**

Wouldnt it just be 300 m? They tell you in the problem that df equals 300 m.
*February 18, 2011*

**ap chem**

No, the pH needs to be converted to H^+ using the inverse log Example: ph = -log[H^+] = 3.0 log [H^+] = -3.0 [H^+] = inv log (3.0) 10^(-3.0)
*February 14, 2011*

**Spanish**

Thank you
*December 21, 2010*

**Spanish**

What is this asking? ¿Cómo eres? choices would be: This question asks about about a person's health about what a person is like how a person is feeling today what a person is wearing I think it is about a person's health or how a person is feeling today? ...
*December 21, 2010*

**10th grade**

How many grams of water vapor (H2O) are in a 10.2 liter sample at 0.98 atmospheres and 26°C?
*December 20, 2010*

**physics**

do you have an answer though? I'd really appreciate it.
*December 11, 2010*

**physics**

Calculate the period of a ball tied to a string of length 0.3 m making 1.9 revolutions every second.
*December 11, 2010*

**math**

All you can do is rearrange it
*December 6, 2010*

**Chemistry**

What is the maximum [Ba^2+] that can be maintained in 1.100 L of a 030 M solution of Na2SO4?
*November 30, 2010*

**geometry**

Emma has 26 feet of fence. She wants to make the largest rectangular area possible for her rabbits to play in. What length should she make each side of the rabbit pen?
*November 17, 2010*

**AP Chem**

2 H2O(g) -> 2 H2(g) + O2(g) H2O(g) -> H2(g) + 1/2 O2(g) 1mol 1 mol 1/2 mole each mole H2O has 2 moles of O-H bonds to break (energy requiring) = 2 x 467 = 934 kJ Each mole H2 has 1 mole H-H bonds to make (energy releasing) = 436 kJ Each mole O2 has 1 mole O=O bonds to ...
*November 15, 2010*

**physics**

A 20 kg mass freely falls a distance of 6m near the Earth’s surface. The total kinetic energy gained by the mass as it falls is approximately A. 120 J B. 1180 J C. 1440 J D. 2400 J
*November 11, 2010*

**Chemistry**

This is the first time I've submitted a question and I just need some help with this one.
*October 20, 2010*

**Chemistry**

Balance the net ionic equation I− + NO− 2 ! NO + I2 (in acidic solution). What is the sum of the coefficients? Use H+ rather than H3O+ where appropriate. 1. 13 2. 15 3. 17 4. 11 5. 19
*October 20, 2010*

**physics**

A toy sled with a mass of 1.0 kg is sliding down a ramp that makes an angle of 25° with the ground. The coefficient of kinetic friction between the toy sled and the ramp is 0.25. 4. In a coordinate system where the x-axis is parallel to the ramp and the y-axis is ...
*October 19, 2010*

**Chemistry**

Hi, I posted my question earlier but I was having some difficulty with it. 2Al+ 3Cl2-->2AlCl3 You are given 31.0g of aluminum and 36.0g of chlorine gas. 1.If you had excess chlorine, how many moles of aluminum chloride could be produced from 31.0g of aluminum? ...
*September 28, 2010*

**Chemistry**

Please help solve; 2Al +3Cl2 --> 2AlCl3 You are give 31.0g Al and 36.0g of Cl2. If you had excess chlorine, how many moles of of aluminum chloride could be produced from 31.0 g of aluminum?
*September 28, 2010*

**Math**

: Jim Kim Mim and Tim all went fishing. They each caught one fish. They measured each fish to the nearest inch and weighed them to the nearest pound. When they lined the fish up end to end they stretched from one edge of the 6-foot-long table to the other. The four fish ...
*September 23, 2010*

**COM/155 English**

Describe your experience with credit and credit cards in a brief paragraph using at least five adverbs and five adjectives in your description. Bold the adverbs and underline the adjectives. What is the most effective way to determine whether a word is an adjective or an adverb?
*August 16, 2010*

**axia college**

Describe your experience with credit and credit cards in a brief paragraph using at least five adverbs and five adjectives in your description. Bold the adverbs and underline the adjectives. What is the most effective way to determine whether a word is an adjective or an adverb?
*August 8, 2010*

**english**

what are some examples of exposition in The Miracle Worker
*May 23, 2010*

**math**

thanks!
*May 9, 2010*

**math**

y^2-3y=54 what is y?
*May 9, 2010*

**math**

How do you make a w made of 4 pens into a perfect square by only moving one pen
*April 15, 2010*

**riddle**

How do you make a w made out of pens into a square by moving only 1 pen
*April 15, 2010*

**Penn Foster Writing Assignment Writing Skills**

this is so dumb they keep sendin mine back after yhe instructer told me it was fine
*March 24, 2010*

**physics**

An electron is accelerated horizontally from rest in a television picture tube by a potential difference of 5400V . It then passes between two horizontal plates 6.1cm long and 1.2cm apart that have a potential difference of 250V At what angle will the electron be traveling ...
*March 23, 2010*

**English**

Whats Wrong with my thesis on Great migration? The Great migration was the movement of African Americans traveling from the South to the north in search for jobs.
*March 15, 2010*

**Science**

What is Analysis?
*February 13, 2010*

**Physics **

A 10,000 kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward?
*January 24, 2010*

**Physics **

A 10,000 kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward?
*January 24, 2010*

**Physics **

This is a pretty simple physics problem, but I do not know how to go about it. How do I: Show that the time required for a projectile to reach its highest point is equal to the time for it to return to its original height?
*January 24, 2010*

**chemistry**

what is the difference between electron affinity and ionization energy?
*January 24, 2010*

**chemistry**

how does the length of time relate to the amount of heat absorbed?
*January 21, 2010*

**algebra II**

4 to the fifth power times 4 to the third power divided by 4 to the sixth power
*January 7, 2010*

**algebra II**

5 3 4 . 4 _______ 6 4 I really need help with this math..I don't understand it and all I have is a worksheet with no examples...I am a 10th grader...any help would be appreciated. Jeremy
*January 7, 2010*

**4th grade math**

the answer is 9
*January 7, 2010*

**math**

how many yards in 48 in. in decimal form rounding to the nearest hundreth
*December 14, 2009*

**literary**

Choose 3 selections from literature that are united into one topic or theme. Your topic can be united by subject, author, genre, style, etc. (requirement) Good speeches will have one clear main topic throughout. My topic is (Remembrance) Thanks for any help.
*December 10, 2009*

**chemistry**

I'm looking for the Lewis structure but not PbCl2. I need the Lezis Structure of PbCl3.
*November 24, 2009*

**chemistry**

What is the Leis Structure for PbCl3?
*November 24, 2009*

**computor programming**

is the design phase of a give project only as good as the analysis of the previous phase
*November 18, 2009*

**history**

How might have the maps indication of where Native Americans lived strengthened European claims of sovereignty?
*November 15, 2009*

**algebra**

14+x2 simplify
*September 1, 2009*

**Math**

Find the quotient 3(cos (5pi/12) + i sin (5pi/12) / 6(cos (pi/12) i sin (pi/12)). Express the quotient in rectangular form. I have no idea what I did but I got (1/4) - 433i/1000.
*August 17, 2009*

**Pre Cal.**

1. Identify the conic section represented by: 9y^2+4x^2 - 108y+24x= -144? Is it ellipse. 2. Find the coordinates of the vertex and the equation of the axis of symmetry for the parabola represented by: x^2 + 4x - 6y + 10 = 0. vertex: (-2 , 1) axis of symmetry: x = -2
*August 17, 2009*

**Pre Cal.**

Express 5sqrt(3) - 5i in polar form. A: 10(cos(11pi/6) + i sin(11pi/6)) Express 4(cos(3pi/4) + i sin(3pi/4)) in rectangular form. A: -2sqrt(2) + 2sqrt(2i Write 2x+y=5 in polar form. A: sqrt(5)= r cos (theta-27degrees) Are these correct?
*August 15, 2009*

**Pre Cal.**

The expression 81p^4 + 108 p^3 r^3 + 54p^2 r^6 + 12 pr^9 + r^12 is the expansion of which binomial? A: (3p+r^3)^4 The fifth term in the expansion of (3x^2-sqrt(y))^6 is _______. A: 135x^4y^2
*August 13, 2009*

**Pre Cal.**

Find three geometric means betwee -sqrt(2) and -4sqrt(2). A: 2, -2sqrt(2), 4 Is 6 sqrt(2)+ 6 + 3sqrt(2)+... a convergent series? A: Yes. Is 1 + 3(1/2) + 9(1/2)^2 + 27(1/2)^3 +... a divergent series? A: Yes. Are these right?
*August 13, 2009*

**algebra 2**

how do i find the radical notation of 25 -1/2?
*March 22, 2009*

**Latin**

In what instances do you use the nominative for the word preceding "of the," in oppose to the genitive. For example, in some of my sentences, I have the nominative, like "Forma terrae in Sicilia plana non est." But other times, it is genitive "Curae ...
*March 16, 2009*

**Latin**

Multi Romani copiam aquae in carris spectant. Would this translate to "Many Romans see the suply of water in the carriages?" Thanks, hopefully this will be the last question.
*March 16, 2009*