# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

92,096 questions, page 172-
## physics

You do a certain amount of work on an object initially at rest, and all the work goes into increasing the object's speed. If you do work W, suppose the object's final speed is v. What will be the object's final speed if you do twice as much work? 1. 4 v 2.

*asked by Anonymous on January 16, 2010* -
## math

Automobiles and small trucks make up 84% of the travel to and from work in the US. What fraction represents all other means of travel to and from work in the US? How would I set this up, I am guessing the answer is 16% but I have no clue how to get the

*asked by Rhonda on June 1, 2007* -
## algebra II

14. Solve the inquality -3(r-11) + 15 equal or greater than 9. 15.Solve the inequality: -2 < 4z = 10 lessthan or equal to 12. 16. Solve the inequality 2x-5 less than or equal to 10 or 33 - 4x < 5 17. Solve the inequality 3 | m -4 | > 6

*asked by PJ. on May 4, 2008* -
## Physics - Angular Momentum

A 230 kg beam 2.4 m in length slides broadside down the ice with a speed of 22 m/s. A 65 kg man at rest grabs one end as it goes past and hangs on as both he and the beam go spinning down the ice. Assume frictionless motion. a) How fast does the center of

*asked by Nik on April 18, 2008* -
## chemistry

Can someone make sure that I am correct with my first solution? Also I need help with the 2nd problem. I am a little confused about where to begin. 1.) 1.7423g of potassium dichromate were placed in a 250.00 mL volumetric flask and water was added to the

*asked by titration on October 7, 2008* -
## precalculus

Find the inverse of the function below. Graph the function below and the inverse function. Determine the domain, range, and asymptotes of the function below and the inverse function. Please show all of your work. and graph. f(x)=e^-x/2+4

*asked by tonia on November 11, 2011* -
## Statistics

You are getting ready to take a sample from a large population, and need to determine the appropriate sample size. You are estimating sales at a large chain of department stores. A previous survey from the same population found a standard deviation of $18.

*asked by Devika on July 16, 2012* -
## Calculus STUCK

Dont know if the radicals will show up.. 2ã3(ã243-2)-ã2(5+7ã2) Can be expanded and simplified to the form p + qã2 + rã3. the value of p + q + r is_____ First I simplified the V243 and I got 9V3 2V3(9V3-2)-V2(5+7V2) 18V9-4V3-5V2-7V2

*asked by -Untamed- on October 4, 2011* -
## Math

Question: A tunnel with a parabolic arch is 12 m wide. If the height of the arch 4 m from the left edge is 6 m, can a truck that is 5 m tall and 3.5 m wide pass through the tunnel? Justify your decision. I drew the graph of the arch with x-intercepts (0,0)

*asked by Emily on August 19, 2010* -
## physics

a grandfather clock is designed to have a pendulum which swings a mass at the end of the chain in a horizontal circular motion. the pendulum is designed to swing 7 degrees off of the vertical. the chain is 1.50 meters long and the maximum tension in the

*asked by nick on October 9, 2016* -
## 7th Math

I previously posted this today at 5:33 am and I am reposting this because I don't want this to be buried with other unanswered questions and I realized this was the wrong subject. How do I answer this question/problem? I can't input the following

*asked by anon on December 2, 2015* -
## chemistry

The traditional method of analyzing the amount of chloride ion present in a sample was to dissolve the sample in water and then slowly add a solution of silver nitrate. Silver chloride is very insoluble in water, and by adding a slight excess of silver

*asked by James on March 16, 2010* -
## cell phone

Cell Phone Cell phones let you make or take calls wherever you happen to be. A third of the world’s population now makes their phone calls this way, and around 3 billion cell phones are in use worldwide. Screen: has a 176 x 220 pixel display that can

*asked by cell phone on February 9, 2011* -
## Physics

Please show how you got the answers, not just the answers. A 40.0 N force stretches a vertical spring 0.250 m. (A) What mass must be suspended from the spring so that the system will oscillate with a period of 1.0 s? (B) If the amplitude of the motion is

*asked by Amanda on July 14, 2010* -
## Titrations (chem)

In the titration of a 0.101 M sodium hydroxide solution, 19.02 mL of 0.130 M sulfuric acid solution was required to neutralize the sodium hydroxide in reactions that replace both hydrogen ions of the sulfuric acid. Calculate the number of milliliters of

*asked by Sarah on April 3, 2011* -
## Chem

Aspirin (acetylsalicylic acid, ) is a weak monoprotic acid. To determine its acid-dissociation constant, a student dissolved 2.00 g of aspirin in 0.600 L of water and measured the pH . What was the Ka value calculated by the student if the of the pH of the

*asked by Katie on March 28, 2010* -
## Chemistry

You have found that 14.37mL of 0.162M sulfuric acid reacts with exactly 20.00mL of barium hydroxide solution of unknown concentration. What is the molarity of the barium hydroxide solution? Round your answer to 3 decimal places and include units. I know

*asked by Micah on May 31, 2017* -
## Chemistry

a) Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 degrees Celcius, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 13.8 g of biphenyl in 32 g

*asked by Eric on August 29, 2015* -
## Math Help

Consider the quadratic equation (a) Solve the equation using the quadratic formula, expressing your answer in terms of k. (b) What condition on k will assure that the equation has exactly one solution? (c) What condition on k will assure that there are two

*asked by Tony on April 28, 2014* -
## Chemistry

Do I solve this by multiplying 1.8645 by 1.14??The equation of your calibration curve from a spectrophotometry experiment was y = 1.8645x. Assuming your calibration curve is set up exactly like it was in lab (concentration in mM on the x axis and

*asked by Ann on June 25, 2013* -
## Physics

Ok work... work = net force parallel to displacement lets say something was pushed up a ramp at a constant velocity and you were asked how much work was done by pushing the block well the forces parellel to the displacement is the x component of gravity

*asked by Physics on October 9, 2009* -
## math

can somone help me with this one , what equations do i have to use or what do i have to to inorder to see if this is possible Lori Morgan has $16,000 invested in Disney and Intel Stock. The Disney stock currently sells for $30 a share and Intel stock for

*asked by jas on June 3, 2007* -
## math help please

I had 12 of these problems got through all but the last one. I need to show the steps The Parkhursts used 160 yd of fencing to enclose a rectangular corral to divide it into two paths by a fence parallel to one of the shorter sides. Find the dimensions of

*asked by sam on December 5, 2007* -
## Physics

Three blocks, connecting ropes, and a light frictionless pulley comprise a system, as shown. An external force P is applied downward on block A (12Kg). The system accelerates at the rate of 2.5m/s^2. The tension in the rope connecting block B (18Kg) and

*asked by Thomas on October 25, 2010* -
## Chemistry

Some solid copper(II) sulfate is dissolved in sufficient water to make 100.0 mL of solution. Enough of a sodium hydroxide solution of concentration 0.1500 mol/L is added just to react with all of the first solution, with none left over. This turns out to

*asked by OLGA on February 22, 2011* -
## Chemistry

Phosphate standards used to generate the calibration curve are usually made by first preparing a stock solution of known concentration, then diluting it to the required concentration. First prepare a stock solution that is 1.00 x 10-2 M in phosphate ion.

*asked by Khaalid on September 6, 2010* -
## Physics Disaster XXP

Had The Same Teacher For Physics And Ughh I Am Stuck. Notes Help Me A Lot So If Anyone Could Write A Few Or A Bunch Out That Would Be Awesome. I Am Not The Type Of A Person Who Minds Writing Down Notes;) Teacher Told Us About Work And That The Formula For

*asked by Fizzylicous on November 16, 2011* -
## Physics Disaster

Had The Same Teacher For Physics And Ughh I Am Stuck. Notes Help Me A Lot So If Anyone Could Write A Few Or A Bunch Out That Would Be Awesome. I Am Not The Type Of A Person Who Minds Writing Down Notes;) Teacher Told Us About Work And That The Formula For

*asked by Fizzylicous on November 16, 2011* -
## Dr Bob

On preparation of a solution of protein, you attempted to dissolve the substance in water, but a suspension resulted. Drop-wise adition of NaOH solution, with stirring, eliminated the suspension. Addition of acid to the original suspension had no effect.

*asked by Andrew on January 26, 2009* -
## com 200

Kyle has struggled to feel comfortable in science classes with labs since his junior year of high school, when a solution he was working with ignited. He was always cautious with chemicals but his lab partner that year enjoyed seeing what would happen when

*asked by susie on July 25, 2012* -
## Math

Could someone please check my math questions? My answers are under the questions... 32. Six times a number less than ten is eight. Find the number. a. 1/3 b. 3 c. -1/3 d. -3 My Answer ~ b 33. Jane works at the public library after school. She makes $7.00

*asked by Abby on October 16, 2015* -
## P.E Health

Which one best describes comparison shopping? A. You are trying to decide if you should buy the size 5 levi's shorts either in blue or black. B. You cannot decide between the quarter pound with white cheese and all the toppings or the one with yellow

*asked by Physical education on April 19, 2016* -
## Algebra

Ramiro earns $20 per hour during the week and $30 per hour for overtime on the weekends. One week Ramiro earned a total of $650. He worked 5 times as many hours during the week as he did on the weekend. Write and solve a system of equations to determine

*asked by Brianna on December 10, 2013* -
## Physics

An early method of measuring the speed of light makes use of a rotating slotted wheel. A beam of light passes through one of the slots at the outside edge of the wheel, travels to a distant mirror, and returns to the wheel just in time to pass through the

*asked by Anonymous on November 29, 2011* -
## chemistry

(i) Explain why the freshman criterion for sponteneity: G=H-TS < 0 is just a statement of the second law of thermodynamics (that the entropy of the universe always increases). Now apply this concept to some ice cubes sitting in a mojito, where the

*asked by merissa on February 11, 2009* -
## Physics

I think that for energy of a spring I should use (1/2)(k)(x^2) and (1/2)(m)(v^2) but i'm not sure what to do with the equations to solve the problem. A cylindrically shaped piece of collagen is being stretched by a force that increases from 0 to 3.0 x

*asked by Brianna on July 14, 2010* -
## thx 4 the help roger

thx 4 the help i got the steps You're welcome and I'm glad you understood the steps. Now use that strategy with your other word problems. Identify what the variable(s) are, convert them to equations, then solve the equations. Always be sure to test your

*asked by alejandra on September 9, 2006* -
## physics

DRWLS: PLEASE SEE ADDITIONAL INFO AT THE BOTTOM its the second part of the question that I don't understand: according the graph shown, the net force acting on an object varies wth the object's displacement. Calculate the work down by the force on the

*asked by Sarah N H on January 30, 2010* -
## Logic (quick yes or no question)

quick yes or no question Is the sun the center of the universe or the earth the center? Neither. The sun is the center of the solar system. Each individual point can be considered the center of the observable universe. The wrote answer of course is no,

*asked by Bryan on November 30, 2006* -
## phy

A constant force does 12.0 Joules of work pushing a 350 gram block a distance of 2.5 meters up a ramp. The block starts from rest and reaches a speed of 4.75 m/s after being pushed for 2.5 m. The block’s potential energy increases by 5.0 J as it travels

*asked by ihsan on June 9, 2012* -
## Physics

An airliner is at point A and is trying to fly to point B, which is 1000 km due North of point A. The pilot of the airliner wishes to reach point B in 2.5 hr. A wind is blowing from the Northwest (45 degrees) at 100 km/hr. In what direction and at what

*asked by Eliyahna on October 26, 2011* -
## Math for Ms. Sue

A geometry class has a pizza party. there are 14 students that have a pizza. Each pizza has 8 slices. The teacher wants to buy the least number of pizzas so that they are the same number of slices for each student. (I know the answers, but I don't know how

*asked by Frustrated on September 21, 2016* -
## science

Most dirt on your body is nonpolar, and is trapped in oil residue on your skin. What type of liquid is oil? (polar or nonpolar) show your calculations. Would water rinse off this dirt, since it is in oil? Why or why not? Does soapy water rinse off this

*asked by Kate on January 16, 2009* -
## Lemos

The circumference of Jenny’s circular table is 2 meters. Jenny wants to paint the table with a fresh coat of paint. If Jenny only wants to paint the top of the table, how many square meters will she need to paint? Use 3.14 to represent π. Show your

*asked by Abner on May 9, 2015* -
## Math

A geometry class has a pizza party. there are 14 students that have a pizza. Each pizza has 8 slices. The teacher wants to buy the least number of pizzas so that they are the same number of slices for each student. (I know the answers, but I don't know how

*asked by Claire on September 21, 2016* -
## question

bus holds 66 people. Starts out empty. Picks up 1 person at the 1st station. 2nd person at the 2nd station 3rd person at the 3rd station and so on. No one gets off. After how many stations will fill up the bus Show your work- explain your thinking?

*asked by decker on January 21, 2009* -
## math

In a scale drawing of a house, the living room is 1 in. long. The actual length is 24 ft. The actual width of the living room is 18 ft. The width on the drawing is __________ in. (Find the width on the drawing). Show your work in every step to receive full

*asked by Taylor on January 9, 2015* -
## Physics

A rifle with a weight of 20N fores a 5.0g bullet with a speed of 300m/s. (a) Find the recoil speed of the riffle (b) If a 700-N man holds the rifle firmly against his shoulder, find the recoil speed of the man and the rifle. Please show work. Thank you!

*asked by Xian on July 14, 2013* -
## Algebra

Which method(s) can you use to solve -2/3c = 16 multiply each side by -2/3 multiply each side by -3/2 divided each side by -2/3 multiply each side by 3, then divided each side by -2

*asked by anwar on November 29, 2015* -
## Chemistry

When 4.65 g of a nonelectrolyte solute is dissolved in 475 mL of water at 27 °C, the resulting solution exerts an osmotic pressure of 931 torr. What is the molar concentration of the solution? How many moles of solute are in the solution? What is the

*asked by Anon on January 29, 2013* -
## statistics/probability

in testing a new drug. researchers found that 20% of all patients using it will have a mild side effect. a random sample of 14 patients using the drug is selected. find the probability that: a) exactly three will have mild side effects. b) at least four

*asked by mary- please check calculations. on October 23, 2010* -
## finite 2

A plant can manufacture 30 tennis rackets a day for a daily cost of $2100 and 50 rackets a day for $3000. Let y represent the cost and x represent the number of rackets. How much more does it cost to produce 31 than 30 rackets per day? Write your equation

*asked by Taffymaple on January 24, 2012* -
## Physic

A 29 kg board 3.2 m long is supported in a horizontal position at the two ends. A 77 kg worker stands 1.4 m from one end. What forces are exerted by the board on the two support points? Points closer to the worker. (Answer: 567N) Points farther from the

*asked by Anonymous on May 14, 2014* -
## physics

A resistor (R = 900 ), a capacitor (C = 0.25 µF), and an inductor (L = 2.0 H) are connected in series across a 240 Hz AC source for which Vmax = 140 V. Calculate values for the following. ---I only need help with part c---- c) the phase angle between the

*asked by asmi on August 5, 2007* -
## Stat Help

A researcher wishes to be 95% confident that her estimate of the true proportion of individuals who travel overseas is within 4% if the true proportion. Find the sample necessary if in a prior study, a sample of 200 people showed that 40 traveled overseas

*asked by Shannon on October 6, 2011* -
## Chemistry

Using standard reduction potentials, calculate the standard E¡Æcell, emf, for each of the following reactions. State if each reaction is spontaneous or nonspontaneous. (Use the below reactions AS WRITTEN, DO NOT REARRANGE ANY REACTIONS.) You must show

*asked by Anna on April 16, 2011* -
## Chemistry- Please help!!

Using standard reduction potentials, calculate the standard E¡Æcell, emf, for each of the following reactions. State if each reaction is spontaneous or nonspontaneous. (Use the below reactions AS WRITTEN, DO NOT REARRANGE ANY REACTIONS.) You must show

*asked by Anna on April 16, 2011* -
## Math

Police report that 88% of drivers stopped on suspicion of drunk driving are given a breath test, 15% a blood test, and 10% both tests. What is the probability that the next driver stopped on suspicion of drunk driving is given: i) at least one of the

*asked by Lindz on October 2, 2006* -
## Algebra 2

I am having trouble with my last two word problems on a homework assignment. For some reason I just can not get word problems and get frusterated. I hope someone can help. Alan was able to rent a moving van for $99 with unlimited mileage or $49 plus .80

*asked by Monica on February 21, 2011* -
## Thermodynamics again.

For the following problem... I found the second pressure by solving P1V1/T1 = P2V2/T2. The Volumes is const so those cancel and then i am able to find the P2. From there i looked at the 1st law and came up with delt U = Qin which = mCvdelta T but that is

*asked by jody on June 16, 2007* -
## Chemistry

(a) The figure above shows how the energy of a system varies as a chemical reaction proceeds. Match the numbers features labeled on the figure above to their corresponding statements below: energy state of the reactants: 1/2/3/4/5 activation energy of the

*asked by Odesa on December 14, 2012* -
## math

Keith is wrapping ribbon around a cylindrical vase he will need additional ribbon to make a bow the vase has a volume of 602.88 cubic inches the bow requires 3 feet of ribbon to the nearest inch what is the least amount of ribbon including the bow does

*asked by tamara ivory on April 11, 2011* -
## Chemistry/Math

If a doctor tells you to drink 1 liter of water per day, answer the following questions(assuming the density of water to be 1g/mL): 1. The number of grams of water per day? 2.The number of molecules of oxygen per day? 3. The number of atoms of oxygen per

*asked by jahil on August 21, 2010* -
## Chemistry

When iron metal reacts with oxygen, the reaction can form Fe2o3 (numbers are subscripts). Write a balanced chemical equation for this reaction and find the number of moles of oxygen that are needed to form 6 mol of Fe2o3. Show your work. I am really stuck

*asked by Leon on March 14, 2017* -
## phy 231

A mass-spring system oscillates with an amplitude of 4.00 cm. If the spring constant is 277 N/m and the mass is 573 g, a.determine the mechanical energy of the system. b.Determine the maximum speed of the object. c.Determine the maximum acceleration.

*asked by Andrea on February 20, 2016* -
## math

Electrical system are governed by Ohm's law, which states that V = IR, where V=voltate, I=current, and R=resistance. If the current in an electrical system is decreasing at a rate of 9 A/s while the voltage remains constant at 14 V, at what rate is the

*asked by christine on May 2, 2010* -
## English

Writeacher, here are the sentences I urgently need you to check. 1)Though you are still a student, refer to the type of approach to work you may adopt when working. Would you work at a job, at a career, or at a passion? 2) Write at least five phrasal verbs

*asked by Matthew on March 25, 2012* -
## Biology

6. Consider an experiment in which starch is dissolved in a liter of water. Some of the solution is placed into a securely tied dialysis bag. The dialysis bag is placed into a beaker containing distilled water and iodine for 30 minutes. What are the

*asked by Lily Grace on September 27, 2016* -
## CHEMISTRY

A solution is made up of 150g of disodium phosphate. Na2HPO4.7H20,dissolved in 2500g of water. what is the molality of the solution? 1) 0.107m 2)0.224m 3)2.365m 4)2.679

*asked by HARLEY on October 4, 2017* -
## Chemistry

A dilute electrolyte solution is prepared by dissoving iron (III) chloride in water. It is found to have a freezing point of -2.10 degrees C. Calculate the molality of the solution.

*asked by Gracyn on October 18, 2010* -
## science

25 ml sample of 0.150 m solution of aqueous trimethylamine is titrated with 0.100 M soultion of hcl. calculate the pH of the solution after 10.0ml,20 ml and 30.0 ml of acid have been added; pkb of (CH3)3 N =4.19?

*asked by Jake on April 19, 2010* -
## chemistry

What is the mass of NaCl required to make 840. mL of solution having an osmotic pressure of 7.70 atm at 36.6°C? This is the approximate concentration of the saline solution used to rinse contact lenses.

*asked by Robin on May 28, 2019* -
## Chemistry

What volume, in liters, of 1.04 M KOH solution should be added to a 0.116 L solution containing 10.08 g of glutamic acid hydrochloride (Glu, FW = 183.59 g/mol; pKa1 = 2.23, pKa2 = 4.42, pKa3 = 9.95) to get to pH 10.15?

*asked by K on July 8, 2015* -
## Chemistry

What mass of sucrose (C12H22O11) would you combine with 5.28 102 g of water to make a solution with an osmotic pressure of 9.14 atm at 298 K? (Assume a density of 1.0 g/mL for the solution.) I came up with 67.5 but no luck...help please!!

*asked by Anonymous on July 3, 2012* -
## Chemistry

A scientist wants to make a solution of tribasic sodium phosphate, , for a laboratory experiment. How many grams of will be needed to produce 625 of a solution that has a concentration of ions of 0.800

*asked by Maddy on October 13, 2011* -
## Chemistry

You have 100.0 mL of 0.2500 M solution of NaCl sitting in a beaker. After several days you test the solution and find out that it is now 0.3721M. How much water must have evaporated?? I got 67.2 mL but its the wrong answer.. PLS HELP!

*asked by Tc on May 5, 2011* -
## science

A scientist wants to make a solution of tribasic sodium phosphate, , for a laboratory experiment. How many grams of will be needed to produce 350 of a solution that has a concentration of ions of 0.500 ?

*asked by Anonymous on October 28, 2011* -
## chemistry

How many milliliters of a 0.200 M HI solution are needed to reduce 21.5 mL of a 0.365 M KMnO4 solution according to the following equation: 10HI+2KMnO4+3H2SO4 ---> 5I2+ 2MnSO4 +K2SO4+ 8H2O

*asked by Kayla on October 18, 2014* -
## Biochemistry

What is the pH of a solution prepared by mixing 150 mL of 0.1M HCl with 300mL of 0.1M sodium acetate (NaOAC) and diluting the mixture of 1L? PKa of acetic acid is 4.76. and give solution

*asked by Maina john on October 22, 2014* -
## chemistry

Ould you please offer me some insight to this, Calculate the hydrogen ion concentration (H+) for the aqueous solution in which (OH-) is1×10-15 mol/L. Is this solution acidic, basic or neutral? Thanks in advance

*asked by lulu on March 20, 2016* -
## chemistry

When an aqueous solution is cooled to low temperatures, part of the water freezes as pure ice. What happens to the freezing point of the remaining solution when this occurs? Explain.

*asked by Anonymous on January 31, 2009* -
## Chemistry

What is the molarity of an Acetic Acid Solution that requires 40.0 ml of 0.100M NaOH to titrate a 20.0ml sample to the end point? (Balanced equation & solution please! Thanks in advance)

*asked by Gage on June 6, 2014* -
## chemistry

What is the mass of the organic product between 2M solution of cyclohexene and 45% solution of potassium permanganate? The volumes of the solutions are the same and equal to 45mL. All needed densities are approximated to 1g/cm3.

*asked by jls9119 on April 13, 2011* -
## Chemistry

Write the equations for the reactions in which acids and bases are neutralized by the buffer consisting of HCOOH and HCOONa is a water solution in order to maintain a relatively constant pH of the solution?

*asked by Amy on March 7, 2017* -
## Chemistry

You dissolve 2.35 g of sodium carbonate (Na2CO3) in sufficient water to produce a final solution volume of 100.0 mL. Assuming all of the solid dissolves, calculate the solution pH.

*asked by Anonymous on March 16, 2017* -
## chemistry

An ethylene glycol solution is mad using 58.5g of (C2H6O2) and diluting to a total volume of 500.0 mL. Calculate the freezing and boiling point. Assume a density of 1.09 g/ml for the solution

*asked by Monique on November 5, 2011* -
## science

What will be the effect on the colour of blue litmus paper when it is dropped in each of the following solution. 1. Water 2. Lime juice 3. Dilute hydrochloric acid 4. Sodium hydroxide solution.

*asked by soloon on September 20, 2016* -
## AP CHEMISTRY

Calculate the solubility of LaF3 in grams per liter in the following solutions. (Ksp = 2. 10-19.) a) pure water Ans: .00182g/L b) 0.037 M KF solution c) 0.055 M LaCl3 solution NEED b&c PLEASE HELP

*asked by HELP PLEASE on March 13, 2012* -
## sciences

What will be the effect on the colour of blue litmus paper when it is dropped in each of the following solution. 1. Water 2. Lime juice 3. Dilute hydrochloric acid 4. Sodium hydroxide solution.

*asked by Ruby belley on September 19, 2016* -
## Chemistry

What volume of solution do you have if you know you dissolved 0.0500g nitric acid to make solution that was determined to be 0.0793M (molarity). My teacher gave 10.0 mL as the answer, but I got .0098. Not quite sure where I went wrong.

*asked by Lindsey on May 20, 2012* -
## ap chemistry

a solution is prepared by dissolving 4.9 g C12H22 O11 (nonelectrolyte) in 175 grams of water. calculate the freezing poitn and osmotic pressure (25C) of this solution.

*asked by yeng on January 7, 2015* -
## Math Thanks

2 Eight children from the Schickel family are combining their savings to purchase a gaming system to connect to and play on their television. The gaming system is on sale at their favorite discount electronics store for 10 percent off of its regular price

*asked by YOLO on May 25, 2015* -
## math

Define variables and write a system of equations for each situation. Solve using substitution. Suppose you are thinking about buying one of two cars. Car A will cost $17,655. Youn can expect to pay an average of $1230 per year for fuel, maintenance, and

*asked by lyne on April 2, 2009* -
## Physics (thx drwls, bobpursley)

After reaching terminal velocity, a raindrop of m=3.06E-4kg falls vertically down a distance of 500m. a)what is the work done by the force of gravity on the raindrop? sol) since the displacement is in the same direction as the force, the work done is

*asked by Matt on March 13, 2007* -
## Math

Solving ya Systems of Equations by elimination -14x+15y=3 21x-20y=-10 The LCM is 42 so I am able to get (-14x +15y=15)3 = -42x+45=45 (21x-20y=-10)2 = 42x-40y=-20 y =7 but when I plug it in to try and figure out x I do not get a whole number, can you help?

*asked by Angela on October 16, 2016* -
## algebra

Write the equation for this situation: the value, v, in hundreds of dollars, of Bob’s stamp collection is 12 dollars more than 1/3 of the age, t (in years). Then graph the equation and use the graph to determine the value of Bob’s coin collection if it

*asked by Sharday on November 1, 2011* -
## Chemistry II

Hydrochloric acid (77.0 mL of .267 M) is added to 236.0 mL of .0730 M Ba(OH)2 solution. What is the concentration of the excess H+ or OH- ions left in the solution? Done two of these. They are all alike. Use the template from the previous problem. Post

*asked by Jayd on April 25, 2007* -
## science-chemistry

An aqueous solution of ammonium nitrite decomposes when heated to give off nitogen gas and water. This reaction can be used to prepare pure nitrogen gas. How many grams of ammonium nitrite must have reacted if 3.75 liters of nitrogen gas was colleced over

*asked by Sean on October 20, 2014* -
## math

Use the ordinary interest method, 360 days, to solve the following word problem. Round to the nearest cent when necessary. Pinnacle Manufacturing received a $40,000 promissory note at 12% simple interest for 95 days from one of its customers. On day 70,

*asked by reva on December 22, 2014* -
## math

One solution contains 20% acid and a second solution contains 50% acid. How many ounces of each solution should be mixed in order to have 60 ounces of a 30% acid solution?

*asked by Anonymous on January 27, 2014*

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