Tuesday

January 27, 2015

January 27, 2015

Total # Posts: 129

**chemistry**

nevermind, got it!
*December 9, 2014*

**chemistry**

The pressure of a gas sample in a rigid container is 810.0 mmHg at 22 oC. What is the pressure, in mmHg, at 50 oC? I have a rough idea on how to solve, but which equation do I use?
*December 9, 2014*

**chemistry**

please help
*December 9, 2014*

**chemistry**

Suppose a gas sample has a density of 3.68 g/L at STP. What is its density at 25 oC and 19.0 atm?
*December 9, 2014*

**chemistry**

Suppose a gas sample occupies 14.9 L at STP. What is its volume at 400 K and 0.87 atm? which equation would you use for this?
*December 9, 2014*

**chemistry**

A mixture of 94.6g of O2 and 82.2g of Ne is placed in a 200.0L container at 250K . What is the partial pressure of O2 in atmospheres?
*December 1, 2014*

**chem **

How do you find the total number of σ and π for CHOCl?
*November 18, 2014*

**chemistry **

How do you find the total number of σ and π bonds in a molecule? Is there an equation?
*November 18, 2014*

**chem**

Given these two reactions, how do I calculate ΔH for the third one? P4(s) + 6 Cl2(g) -> 4 PCl3(g) ΔH= -1148 kJ P4(s) + 10 Cl2(g) -> 4 PCl5(g) ΔH = -1500 kJ PCl3(g) + Cl2(g) -> PCl5(g) ΔH = ?
*November 18, 2014*

**math**

what is decimal
*November 14, 2014*

**Pre-Calculus**

Prove the identity: cos(x-π/2)=sin x
*November 12, 2014*

**Science, Physics**

A 800kg safe is 2.3m above a heavy-duty spring when the rope holding the safe breaks. The safe hits the spring and compresses it 52cm.What is the spring constant of the spring?
*November 5, 2014*

**Pre-Calculus**

Factor the polynomial completely, and find all its zeros. State the multiplicity of each zero P(x)= x^3-x^2+x
*September 14, 2014*

**math**

Evaluate for each expression m = 2/5 and n = 1/2 1) 2m + n 2) 2m - n Please explain so I can understand the rest of the questions.
*May 25, 2014*

**math**

The grade 8 class at Wheatly Middle School sold 77 boxes of almond chocolates. This is 22% of all the boxes of chocolate sold. a) Estimate the total number of boxes sold. b) Calculate how many boxes were sold.
*May 9, 2014*

**finance**

3.The Lo Company earned $2.60 per share and paid a dividend of $1.30 per share in the year that just ended. Earning and dividend per share are expected to grow at a rate of 5% per year in the future. Determine the value of the stock:
*February 16, 2014*

**math**

contract the expression,use the property of logarithms to write each expression as a single logarithm with a coefficient of 1
*February 15, 2014*

**finance**

accident!
*February 13, 2014*

**ag**

which of the following determines who holds the position of speaker of the house? a the president b the house c the senate d the joint houses of congress
*December 19, 2013*

**CHEMISTRY**

An ethanol-water solution is prepared by dissolving 10.00 ml ethanol C2H5OH (density=0.789g/ml) in sufficient water to produce 100.00 ml of solution with a density of 0.982g/ml. What is the concentration of ethanol in this solution? Expressed as ml. a.)%volume b.)%mass c.)%m/v...
*November 13, 2013*

**english**

how to write solving problems scene of three characters which started with prologue
*November 5, 2013*

**Math**

whats the answer?
*September 29, 2013*

**Math**

I also need answers.
*September 29, 2013*

**physical mod**

What mass (in grams) of steam at 100°C must be mixed with 462 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 40.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent ...
*September 13, 2013*

**math**

how to factorise?
*September 9, 2013*

**physical pharmacy **

Hoy does KH2PO4 induce controlled flocculation..?
*September 5, 2013*

**chemistry**

no one knows?
*May 10, 2013*

**chemistry**

A solution contains 25.5 g of NaCl dissolved in sufficient water to give a total mass of 325.0 g. What is the molality of the solution
*May 10, 2013*

**chemistry**

A solution of ethanol, C2H5OH, is prepared by dissolving 25.0 mL of ethanol in enough water to give a total volume of 250.0 mL. What is the percent-by-volume concentration of ethanol?
*May 10, 2013*

**Trigonometry**

wheels on a skateboard are 3.63 inches. If the skateboarder is travelling down a hill at 23 miles per hour what is the angular velocity.
*April 14, 2013*

**Phtsics**

Two identical point charges are separated by a distance of 3.0 cm and they repel each other with a force of 4 X 10^-5 N. What is the new force if the distance between the point charges is doubled?
*February 14, 2013*

**Language art**

I am new to this also.
*February 5, 2013*

**Physics**

The height of a rocket is launched from a platform 12 meters above the ground is modeled by the function h(t)=-4.9t^2+25t+12 where h(t) represents the height of the rocket in meters and t represents the number of seconds after launching. How many seconds after launching will ...
*January 24, 2013*

**Physics**

The height of a rocket is launched from a platform 12 meters above the ground is modeled by the function h(t)=-4.9t^2+25t+12 where h(t) represents the height of the rocket in meters and t represents the number of seconds after launching. How many seconds after launching will ...
*January 24, 2013*

**Physics**

The height of a rocket is launched from a platform 12 meters above the ground is modeled by the function h(t)=-4.9t^2+25t+12 where h(t) represents the height of the rocket in meters and t represents the number of seconds after launching. How many seconds after launching will ...
*January 24, 2013*

**Physics**

The height of a rocket is launched from a platform 12 meters above the ground is modeled by the function h(t)=-4.9t^2+25t+12 where h(t) represents the height of the rocket in meters and t represents the number of seconds after launching. How many seconds after launching will ...
*January 24, 2013*

**math**

btw thats for you ms.sue
*December 8, 2012*

**math**

i told some of my classmates about this site and they said it really help but they also added that you all shall show examples when you are finished and an explanation and then give the person a sum similar to that.
*December 8, 2012*

**Finance**

On July 1, 2011, Jackson Company exercises a $5,000 call option (plus par value) on its outstanding bonds that have a carrying value of $208,000 and par value of $200,000. The company exercises the call option after the semiannual interest is paid on June 30, 2011. Record the ...
*December 3, 2012*

**math**

I NEED HELP
*November 5, 2012*

**math**

I LEARNT SOMETHING
*November 5, 2012*

**math**

HOW YOU DO THAT?
*November 5, 2012*

**Chemistry**

0.3 grams NaOH dissolved in 2.5litres. How many moles?
*October 27, 2012*

**english**

help me in direct and indirect
*October 24, 2012*

**math**

how do you do this table? (gx2)-3 ?
*October 10, 2012*

**Physics**

A mass of m1 = 6.00 kg is sitting on an inclined plane, which meets the horizantal at an angle of 22.0, which has a coefficient of sliding friction of 0.290, which is 3.50 m = L. a string is attached to m1, it is strung over a pulley, and attached to mass m2 = 7.0kg which is ...
*September 30, 2012*

**english**

Identify the appositive or complete appositive phrase. Sam, our cat, is too lazy to catch mice.
*September 26, 2012*

**Ms.Susu's math**

someone tell me what website to go on and find x+z-h=___
*September 13, 2012*

**physics**

umm i will help you just go to google look up the question
*September 13, 2012*

**world history**

idk look it up on google com then find it is youu a girl (chicka) or a boy {chicko}
*September 12, 2012*

**science**

In science wwhy is that when they say what is the meaning of friction?
*September 10, 2012*

**math**

3/4
*April 10, 2012*

**Math**

Perform the indicated operations and simplify: i^-31
*April 8, 2012*

**Math**

divide the left and right side of the equation by ð r^2 V / (ð r ^2) = h ?
*March 7, 2012*

**Math**

im not sure how to solve this problem at all
*March 7, 2012*

**Math**

C B D?
*March 7, 2012*

**Math **

A rectangular prism has a length of 100 cm, a height of 10 cm and a width of 5 cm. What is the volume of the rectangular prism? A. 3100 square centimeters B. 1550 square centimeters C. 5000 square centimeters D. 1200 square centimeters 2. A cylinder has a diameter of 5 meters ...
*March 7, 2012*

**chemistry **

1. Which of these chemical formulasCl2, KCl, Ar, or NO2represents both an element and a molecule? 2. A miner finds a small mineral fragment with a volume of 5.74 cm3 and a mass of 14.4 g. What is the density of that mineral fragment?
*March 7, 2012*

**Chemistry**

thank you !
*March 7, 2012*

**Chemistry **

Pentane gas (C5H12) combusts with oxygen gas (O2) to form water (H2O) and carbon dioxide (CO2). Write a balanced chemical equation for this reaction and explain the scientific principle (statement) that requires the balancing of an equation to make it conform to reality.
*March 7, 2012*

**chemistry**

Explain in one or two sentences how new evidence affects scientific models
*February 8, 2012*

**chemistry**

Use the balanced equation below to answer the following questions. 2Al(NO3)3 + 3Na2CO3 Al2(CO3)3(s) + 6NaNO3 - What is the ratio of moles of Al(NO3)3 to moles Na2CO3? (1 point) - If 852.04 g Al(NO3)3 reacted with the 741.93 g Na2CO3, which would be the limiting reagent? Show ...
*February 8, 2012*

**chemistry**

Use the following steps to balance the redox reaction below: Mg + Au+ Mg2+ + Au -Write the oxidation and reduction half-reactions. Make sure each half-reaction is balanced for number of atoms and charge. -Multiply each half-reaction by the correct number, in order to balance ...
*February 8, 2012*

**Chemistry**

A stock solution is prepared by adding 20mL of 0.2M MgF2 to enough water to make 80mL. What is the F– concentration of 20 mL of the stock solution?
*November 3, 2011*

**biology**

if offspring exhibit a 3:1 phenotype ratio, what are the genotypes of the parents?
*November 2, 2011*

**latin**

what latin word is the phrase strong distaste derived rom
*October 24, 2011*

**English**

Please help me errors in my paper so I can correct them. The Lottery takes place on a beautiful summer day in a small town. Although the location of the town, is never given, it appears to be in a rural community. The story begin as a regural summer day, but has a surising ...
*October 17, 2011*

**English**

The Lottery takes place on a beautiful summer day in a small town. Although the location of the town, is never given, it appears to be in a rural community. The story begin as a regural summer day, but has a surising ending. In the short story "The Lottery" by ...
*October 17, 2011*

**English**

Please check for any errors in my paper. And crrect the errors for me. Let me know if there is anything I need to change. The Lottery takes place on a beautiful summer day in a small day in a small town.However, the the location of the town, is never given, it appears to be in...
*October 15, 2011*

**physics 12**

An 884 kg satellite in orbit around a planet has a gravitational potential energy of -5.44*10^10 J. The orbital radius of the satellite is 8.52*10^6 m and its speed is 7.84*10^3 m/s. A) What is the mass of the planet? B) What is the kinetic energy of the satellite? C) What is ...
*October 8, 2011*

**math**

3 times 3
*October 6, 2011*

**math**

write an expression to represent each total and then simplify it cost of 2 pens and 3 notebooks the note books costs 179 each nd the pens 289 each
*August 18, 2011*

**math**

classify each statement as sometimes, always, or never true. give examples or properties to support your answer a+ (bc) =( a+b) .(a+c)
*August 17, 2011*

**Math**

Find the perimeter of the triangle with vertices at A (0, 0), B (-4, -3) and C (-5, 0). If it is not possible, write “not possible” and explain why it is not possible.
*June 23, 2011*

**english**

our cat
*June 22, 2011*

**Geometry**

Part 1. The area of a circular pool is approximately 7,850 square feet. The owner wants to replace the tiling at the edge of the pool. The edging is 6 inches wide, so he plans to use 6-inch square tiles to form a continuous inner edge. How many tiles will he need to purchase...
*April 10, 2011*

**chemistry 32**

Calculate the concentration, in molarity, of a solutiion prepared by adding 9 mL of water to 1mL of 0.1 M of HCl
*March 10, 2011*

**algebra 1**

four less than half a number is 17.find the number
*March 2, 2011*

**Business**

A bond price of $987.50 has a face value of $1000, pays 5% semiannually, and will repay the face value in 15 years. 5% tables Present Values Pv Annuity year 13 .53032 9.39357 year 14 .50507 9.89864 year 15 .48102 10.37966 What is the yield to maturity of the loan a) 4.9% b) 5....
*January 11, 2011*

**accounting**

A bond price of $987.50 has a face value of $1000, pays 5% semiannually, and will repay the face value in 15 years. 5% tables Present Values Pv Annuity year 13 .53032 9.39357 year 14 .50507 9.89864 year 15 .48102 10.37966 What is the yeild to maturity of the loan a) 4.9% b) 5....
*January 10, 2011*

**Chemistry**

Calculate the concentration, in molarity, of a solutiion prepared by adding 9 mL of water to 1mL of 0.1 M of HCl
*December 6, 2010*

**4th grade math input output tables**

how do you do this on the table ??? expression (gx2)-3
*October 25, 2010*

**chemistry**

calculate the frequency of light that has a wavelength of 103 nm
*October 19, 2010*

**math**

what is the mathematical expression of 9+4x5 divided by 2 ?
*October 14, 2010*

**4th grade**

what is a question with the word there force
*October 13, 2010*

**chemistry**

How did dalton discover the atom?
*September 28, 2010*

**math 116**

How do you know if a value is a solution for an inequality? How is this different from determining if a value is a solution to an equation? If you replace the equal sign of an equation and put an inequality sign in its place, is there ever a time when the same value will be a ...
*March 24, 2010*

**math 116**

How do you know if a value is a solution for an inequality? How is this different from determining if a value is a solution to an equation? If you replace the equal sign of an equation and put an inequality sign in its place, is there ever a time when the same value will be a ...
*March 24, 2010*

**calculus**

look at the answer for number 13 in 7.2 in the book or the solutions manual if you have it
*February 23, 2010*

**college algebra**

(5,1) is a solution to the equation 2x-3y=7. what does this means
*February 18, 2010*

**math**

1/3k-4=1
*February 15, 2010*

**u.s historyy**

brittish officals issued warrents called _____ when they wanted to search for smuggled goods
*February 8, 2010*

**Chemistry**

What is the representative particle for a salt, nacl2?
*February 3, 2010*

**Economics**

Good luck
*November 14, 2009*

**math**

Factor completely x³-8x²+11x+20
*November 4, 2009*

**health**

Post your response to the following: Explain whether or not you believe CHAMPVA provides an adequate level of health insurance for participants.
*October 19, 2009*

**PRE-CALC**

**********Correct easy answer************* See this last answer would've been right up to one point I got a different answer than all of you guys :P HINT: To actually visualize the problem, draw it out! :) Obviously the dimensions of the painting are: w and 3+w We know ...
*October 16, 2009*

**College Algebra**

Knowing the given conditions, write the equation of the circle. Center at (5,3) and tangent to the y-axis.
*September 19, 2009*

**english**

CHANGETHE FOLLOWING BORING VERBS AND ORDINARY ADJECTIVES SAD,MAD, LITTLE,WENT,BIG,DARK,NICE,OLD,BIG,TOOK,NEW,SAW,HOLDING ON TO, WENT,GOTUP,SCARED,GOT,HIT
*March 29, 2009*