# osmotic pressure chemistry

10,993 results, page 46
1. ## Chem

I need help I don't get this 1. Since the gas in your graduated cylinder is a mixture of butane and water vapor, you must determine the partial pressure of the butane, Pbutane, alone. To do this, consult a reference and record the partial pressure of the

asked by |-/ on March 7, 2017
2. ## Stoichiometry

I am taking an online chemistry class and I do not at all understand how on earth how to do stoichiometry. I just don't get it, its not that I don't know how to do the math, but figuring out how to ger the information. PLEASE HELP!! When 11.7 grams of iron

asked by Kesiah on July 10, 2008

Please refer to the previous post Chemistry Help Please. Moles of S203^2- = (molarity)(volume): =(0.032400 mol/L)(0.053 litres S203^2-) = 0.03240 moles S203^2- Posted by DrBob222 on Wednesday, October 22, 2008 at 9:37pm in response to GK..please

asked by Sara on October 23, 2008
4. ## MATH

The National Association for Women in Science asked recent high school grads if they had taken certain science classes. Of those surveyed, 23 said they had taken physics, 47 said they had taken chemistry and 5 said they had taken both. Seven said they had

asked by Jen on July 8, 2011
5. ## French

Can someone please help edit my French? My French: Quelles matières étudiez-vous cette année ? Moi, je fais deux les maths, la chimie, la physique, l’anglais et le français. Je n’aime pas les maths parce que il y a beaucoup des devoirs pour les

asked by Darren on January 20, 2012
6. ## Chemistry

I need to take some following samples of these: *a hydrocarbon w/a molecular mass greater than 100 g/mo *something w/ L-carvone or D-carvone in it *a non-electrolyte that dissloves in water *something w/a pressure greater than 2.o atom *a proton donor can

asked by VaNeSsA on February 5, 2007
7. ## chem -repost for bobpursley

i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the

8. ## chemistry

What mass in grams of potassium hydroxide is cntained in 500 mL of solution that has a pH of 11.5? For Further Reading chemistry - DrBob222, Sunday, April 6, 2008 at 12:09am pH = 11.5 pOH = 14 - 11.5 = 2.5 pOH = -log(OH^-) ] 2.5 (OH^-) = ?? KOH ==> K^+ +

asked by Sarah on April 7, 2008
9. ## Chemistry -thanks

Hi,there was an error with the procedure. 1.0g NaOH sample was dissolved in 5ml of water and acidified with 4ml of conc. nitric acid,not dilute nitric acid. This was then made up to 15ml with water.After acidifying with conc. nitric acid instead of dilute

asked by candy on September 23, 2010
10. ## Separation process

Oil used to absorb benzene from gas is to be stripped with steam at P = 1atm to recover the benzene.Equlibrium at the operating temperature is approximated using Henry's Law.When the oil contains 10%mol of benzene,the oil's partial pressure is 5.07kPa.The

asked by Meenaakshi on March 15, 2013
11. ## Chemistry

I have just moved and transferred to a new school. My chemistry class is really ahead of my old class, so I am having some problems that I just cannot understand through the book. I guess I could ask the teacher but I am a bit shy and this assignment is

asked by Jessica on February 25, 2008
12. ## chemistry

A student generates H2(g) over water using the reaction between zinc and hydrochloric acid Zn(s)+ 2HCl(aq)---> ZnCl2(aq)+ H2(g) Data: Mass of vial and zinc 15.5082 mass of vial 15.3972 mass of zinc 0.111 final burette reading 45.30mL barometric pressure:

asked by Yuli on November 24, 2011
13. ## Chemistry

If a solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC ..is how many

asked by EGM on September 23, 2011
14. ## chemistry

so we did a chemistry lab to find the relationship between temperature and volume or charle's law. In the experiment, i got t1v1=372K, 267.2 cm^3 t2v2=277K,169.1 cm^3 so i graphed that THen they told us to chose 2 other points from that line, TaVa and TbVb

asked by X on May 5, 2011
15. ## science

A 3.70 L sample of neon at 11.24 atm is added to a 10.0 L cylinder that contains argon. If the pressure in the cylinder is 5.24 atm after the neon is added, what was the original pressure (in atm) of argon in the cylinder?

asked by john on October 9, 2014
16. ## chemistry

1- A compound is 87.5% nitrogen and 12.5% hydrogen. The molecular weight of the compound is 32 g/mol. Describe the molecule referencing shape, and inter-molecular forces. 2- Gaseous butadiene, C4H6 , reacts with hydrogen gas in the presence of a platinum

asked by Katie on January 6, 2014
17. ## chemistry

convert a pressure of 1.75 atm to kpa

asked by luke on June 4, 2012
18. ## PHYSICS

Pressure at the bottom doesnot depdnd on..

19. ## Science

Why does pressure change with elevation and depth

asked by Amanda on October 24, 2017
20. ## Chemistry

Why was sublimation performed under reduced pressure?

asked by Vivian on February 5, 2017
21. ## Physics

What is the absolute pressure 1.8 m below the surface of a lake?

asked by Lance on May 7, 2018
22. ## Science

What is pressure? as in one of thethings the skin responds to.

asked by Kerry-Ann on January 9, 2008
23. ## chemistry

What can cause high pressure inside a reactor?

asked by Namie on October 20, 2012
24. ## chemistry

convert a pressure of 1.75 atm to kpa

asked by luke on June 4, 2012
25. ## science

differences in the air pressure causes __________

asked by aiswarya on September 8, 2018
26. ## Management

Is pressure of work a barrier for planning?

asked by sam on December 17, 2016
27. ## Biology

HOW DOES A CELL WALL HELP WITH “TURGOR PRESSURE?”

asked by Ashley on October 24, 2012
28. ## English

peer pressure destroys character yes or no?.

asked by Stephen on January 29, 2017
29. ## chemistry

which element is liquid @ 25.0c and 1 atmosphere pressure?

asked by shiri on September 24, 2012
30. ## Physics

What is the absolute pressure 2.5 m below sea surface?

asked by Lance on May 7, 2018

why is Bank of America CEO under Pressure

asked by Anonymous on June 20, 2010
32. ## Science

Why is blood pressure expressed with 2 numbers?

asked by MARIANNE on January 29, 2011
33. ## physics

Calculate pressure if force is 5N in an area of 1m.sq.

asked by Anonymous on February 18, 2011
34. ## Physical Science

Why does pressure change with elevation and depth?

asked by Anonymous on April 17, 2013
35. ## chemistry

A sample of N2 with a pressure of 790mmHg at -80∘C is heated to 35∘C.

asked by Anonymous on July 18, 2013
36. ## Chemistry

What is the mathematical relationship between pressure and temperature?

asked by Ana on January 20, 2011
37. ## science

air pressure changes whats the effect of that

asked by jason on January 26, 2010
38. ## Physics

Show that the pressure P of a gas can be written as: P= 1/3* p* v^2

asked by Beth on September 21, 2010
39. ## Science/Health

What might happen if you have a high blood pressure????

asked by Erika on February 10, 2011
40. ## Chemistry

define pressure how many mm Hg are in 875.1kPa

asked by tt on October 26, 2014
41. ## Biology

Why does smoking cause a rise in blood pressure?

asked by Tara on April 7, 2009
42. ## science

How does your body keep from being crushed from air pressure?

asked by Alyssa on May 4, 2011
43. ## Chemistry

If 20.0 g of N2 has a volume of 4.00 L and a pressure of 6.0 atm, what is its temperature?

asked by Sandra on November 9, 2010
44. ## geography

how do you do a high pressure weather report?

asked by scooby on January 10, 2010
45. ## Physical Science

Why does pressure change with elevation and depth?

asked by Anonymous on April 18, 2013
46. ## Phycis

What is the formular of (forced,Areaand pressure)

asked by Ajey on November 9, 2015
47. ## Science of the Atmosphere

What is the temperature of air, given P= 90 kPA and the pressure is 1.0 kg(m^-3)? Thanks!

asked by Rebekah on September 7, 2014
48. ## science

how do you keep your body from being crushed by air pressure?

asked by kayla on January 6, 2009
49. ## Science of the Atmosphere

What is the temperature of air, given P= 90 kPA and the pressure is 1.0 kg(m^-3)? Thanks!

asked by Rebekah on September 6, 2014
50. ## Med

What is the influence of pressure on the respiratory system?

asked by C on February 11, 2016
51. ## Chemistry

What unit is barometric pressure measured in?

asked by Ana on February 28, 2011
52. ## science

What altitude would you be at if the air pressure is 0.05 kpa.

asked by Wendi on January 7, 2014
53. ## chemistry

which unit is used to express the pressure of gas?

asked by Anonymous on October 26, 2014
54. ## physics

Why do we measure blood pressure in mercury?

asked by Alicia on February 25, 2015
55. ## integrated science

explain pressure relations for air

asked by brit on June 9, 2011
56. ## Chemistry

Organic chemistry: an attempt at synthesizing a certain optically active compound resulted in a mixture of its enantiomers. The mixture had an observed specific rotation of 11.0 degrees. If it is known that the specific rotation of the R enantiomer is

asked by Tokey on November 4, 2010
57. ## ionic equations chemistry

Li2CO3+HBr-> I don't know what you want. Li2CO3 + HBr ==> LiBr + H2O + CO2 You will need to balance it Li2Co3+2HBr->H2Co3+2LiBr then you seprate Li(aq)+1 + Co3(aq)+2 + 2H(aq)+1 + 2Br(aq)+1 --> H(aq)+1 + Co3 (aq)+2 + 2Li(aq)+1 + 2Br(aq)+1 then cancel out

asked by jessica on June 1, 2007
58. ## ap chemistry

A sample of gas in a cylinder of volume 4.2 L at 316 K and 2.68 atm expands to 7.21 L by two different pathways. Path A is an isothermal, reversible expansion. Calculate the work for Path A. Answer in units of J Path B has two steps. In the first step, the

asked by hanna on October 8, 2012
59. ## Chemistry/English

In chemistry we are writing a paper about an inventor.. We have to have some back ground info.. what they invited. how there time affected there inventions and if there inventions where a great success and so on so forth. What would be a good way to set

asked by ammmyyy on October 21, 2010
60. ## math hw

10.Thirty students in a chemistry class took a test on which the overall average score was 78. If the average score for 15 of those students was 85, what was the average score for the remaining members of the class? I know that "average" means dividing,

asked by David on August 4, 2014

A 5.0 g n2o (laughing gas) that is inside a 12 mL cylinder used used to fill up a 800 mL whipped cream container. Beforehand, the container had air in it at 760 torr atmosphere pressure at 25 degrees celsius. Then, we will add the n2o/air mix to balloon

asked by Elena on January 16, 2015
62. ## chemistry

determine the vapor pressure of a solution at 55 degrees C that contains 34.2g NaCl in 375 mL of water. The vapor pressure of pure water at 55 degrees C is 118.1 torr. so Psolution=XsolventPsolvent I don't know why I'm not getting the correct answer... so

asked by natash on May 12, 2008
63. ## Chemistry and @DrBob222

Sorry for the mix up -- here's what DrBob222 posted for the Chm or Chemistry question: What subject is CHR? If you don't label the subjects correctly the proper tutor won't know you need help. This question can't be answered as posted. You need the

asked by Writeacher on September 4, 2017
64. ## Ochem

What volume of eugenol will be present in 30 mL of distillate? The essential oil found in cloves, eugenol, can be isolated by steam distillation because it is insoluble in water and has a measurable vapor pressure at 100 °C even though it has a much

asked by Chem on August 4, 2014
65. ## Ionic compounds Scinece

3. What happens to the change on individual ions when they form ions? 11. Write the names of the two ions in each of the following compounds. (C) Na2O (E) Na3PO4 (G) NH4OH (H) Ca (NO3)2 8. Use the tables of metals, non-metals, and polyatomic ions and the

asked by Joshua on January 22, 2015
66. ## Chemistry

Imagine that you have a 6.00L gas tank and a 3.00L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 125atm , to what

asked by Anonymous on May 1, 2015
67. ## chemistry

I've been doing organic chemistry and I don't really understand how to draw some isomers. I know how to draw the easier isomers like Butan-1-ol and Butan-2-ol but I don't get how there can be other ones and how to draw them...please help

asked by Anonymous on June 21, 2008

. Ksp for Fe(IO3)3 is 10-14. Two solutions, one being iron(III) nitrate and the other being sodium iodate, were mixed. At the instant of mixing, [Fe3+] = 10-4M and [IO3-] = 10-5M. What happens? My answer is that a precipitate forms because Qsp > Ksp. Would

asked by Hannah on April 10, 2012
69. ## Physics

Calculate the Patm And the pressure exerted by water on the block - The area Of the upper face of block is 40 cm2 Calculate the total pressure exerted on the solid Given : In the first tube : in a tube a solid .. the height from solid to the water level in

asked by Nana on April 23, 2010
70. ## Fluid Mechanics

A supersonic wind tunnel is to be operated at M=2.2 in the test section. Upstream from the test section, the nozzle throat area is 0.07 m². Air is supplied at stagnation conditions of 500 K and 1.0 MPa (abs). At one flow condition, while the tunnel is

asked by Katie on March 22, 2009

1. The relationship between temperature and volume is known as what law? 2. What is the relationship between temperature and pressure? (directly proportional or inversely proportional) 3. The relationship between volume and pressure is known as what law?

asked by Charlotte on December 3, 2013
72. ## math

Sheryl correctly answered 85% of the questions on her 200-question biology final. Fernando scored a 90% on his 180-question chemistry final. (a) Who answered more questions correctly? (b) Who answered more questions incorrectly?

asked by student on December 8, 2009
73. ## Algebra 1

1. A chemistry student needs to make a solution that is 70% water and 30% hydrochloric acid. The student's current mixture of 300 ml is 60% water and 40% hydrochloric acid. How much water must the student add to achieve his desired solution? A: ? 2. 5. 2/t

asked by Victoria on June 3, 2014
74. ## Math

Hi, I am getting very frustrated. I am doing an online homework for chemistry and it's telling me to round to the nearest WHOLE number. So the answer I got was -1435.650.... And I typed in -1436. and said I was wrong and so I tried it again and typed 1.4 x

asked by Anonymous on August 5, 2010
75. ## Chemistry due soon

I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How

asked by Morgan on February 4, 2015
76. ## Chemistry

I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How

asked by Morgan on January 30, 2015
77. ## chemistry due soon

I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How

asked by Morgan on February 7, 2015
78. ## Chemistry

I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How

asked by Morgan on February 1, 2015
79. ## chemistry

I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How

asked by Morgan on February 7, 2015
80. ## chemistry

I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How

asked by Morgan on February 4, 2015
81. ## Chemistry

When 50 grams of hydrocarbon X are burned with oxygen the products are carbon dioxide and water. If 65 grams of water and 100 grams of carbon dioxide are produced, how many grams of oxygen were needed for the reaction? This was a question on my chemistry

asked by Ryan on February 28, 2016
82. ## chemistry hellllllllllllllllllp

Oxidising and reduction- Chemistry? Oxidation and reduction can be described as the loss and/or gain of electrons from an ion or atom (species) in a chemical reaction. For the following aqueous reaction, select the species that is oxidized and similarly

asked by centya on January 10, 2013
83. ## math

in chemistry class, todd has 1 liter of a 23% sulfuric acid solution, how much of a 15% sulfuric acid solution must he mix with the 1 liter of 23% solution to make a 18% solution?

asked by sup on December 13, 2015
84. ## algebra

A student missed 11 problems on a Chemistry test and received a grade of 65%. If all the problems were of equal value, how many problems were on the test? Round off your answer to the nearest integer. X= # of problems 11= 3 of missed problems 65% of

asked by jennifer on October 12, 2016
85. ## physics

A liquid of density 1354 kg/m^3 ﬂows with speed 2.45 m/s into a pipe of diameter 0.29 m. The diameter of the pipe decreases to 0.05 m at its exit end. The exit end of the pipe is 7.82 m lower than the entrance of the pipe, and the pressure at the exit of

asked by michelle on November 29, 2012
86. ## chemistry

I need help. I have no clue how to find this. A flask is charged with 1.680 atm of N2O4(g) and 1.220 atm of NO2(g) at 25 degrees celcius. The equilibrium reaction is N2O4 2 NO2 After equilibrium is reached, the partial pressure of NO2 is 0.550 (a) What is

asked by Alexus on February 26, 2016
87. ## science

what is the charge on a copper nucleus The atomic number is the number of protons in the nucleus and protons have a charge of +1. What is the atomic number of copper? Look on the periodic table. If you don't have one at home, here is one on the web.

asked by vannesa on October 26, 2006
88. ## CHEMISTRY

Dr Bob Can you confirm please Given a cylinder of fixed volume filled with one mole of Ar gas,which of the following is CORRECT? (assume that all gases obey the ideal gas laws) A: if the cylinder temp. is changed from 20 to 25 deg.C the pressure will

asked by Andy on May 11, 2010
89. ## Dobson

a)The element with the greatest density is osmium, which has a density of 22.6g/cm3. Calculate the mass of 32.1 cm3 of osmium. b)A team of students determined the density of a sample of wood to be 0.52 g/cm3. A handbook of chemistry reported the density of

asked by Anonymous on March 26, 2010
90. ## Physics

An incompressible fluid is flowing through a horizontal pipe with a constriction. The velocity of the fluid in the wide section of the pipe is 4.00 m/s and the velocity of the fluid in the narrow section of pipe is 9.00 m/s. The pressure of the fluid in

asked by Mikhail on November 10, 2013

1) Nitrosyl chloride (NOCl) decomposes at high temperature. The equation is 2 NOCl (g) -> 2 NO (g) + Cl2 (g) at 227oC Using delta Ho = 81.2 kJ and delta So = 128 J/K, calculate the value of the equilibrium constant for this reaction. I do not know how to

asked by Hannah on April 24, 2012
92. ## Chem

Consider 1.40 mol of carbon monoxide and 3.20 mol of chlorine sealed in a 8.00 L container at 476 oC. The equilibrium constant, Kc, is 2.50 (in M-1) for CO(g) + Cl2(g) ↔ COCl2(g) Calculate the equilibrium molar concentration of CO. So I tried this

asked by Anonymous on February 12, 2013
93. ## science

college chemistry-absorbance of an equilibrium mixture Problem: A student mixed 4.00mL of 1.02x10^(-1) M Fe(NO3)3 with 100.00mL of 1.98*10^(-4) M KSCN, using 5.0*10^(-1) M HNO3 as the solvent for both solutions, and found the absorbance of the resulting

asked by Mary on March 14, 2009
94. ## Dr. Bob

And here is the discussion part of the lab how would I put like a concluding sentence to this. DISCUSSION: This experiment was conducted to determine the iron content in a breakfast cereal. The results indicate 39% iron in a sample of Kix cereal. This

asked by Suzy on November 18, 2007
95. ## Chemistry

Hello everybody, I'm having difficulty understanding the rationalization behind the strengths of Bronstend Lowry acids and bases and my textbook isn't too helpful. Can someone please expalin to me: (1) What exactly is effective negative charge density? (2)

asked by John Peterson on July 17, 2007
96. ## physics

A portable steel tank with a volume 35 liters (0.035m³) holds helium gas used for filling party balloons. The pressure in the tank is 120atm when at room temperature of 22 °C. How many moles of helium gas are in the tank? Each balloon has a volume of

asked by sand on January 4, 2012
97. ## Physics HELP!!!!!!!!

The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 4.0 x 10^5 Pa, and the horizontal divisions represent 4.5 x 10^-3 m3. The diagram is a upright rectangle divided into small squares

asked by Mary on April 23, 2007
98. ## algebra

A chemistry lab wants to prepare 300 liters of 25% acid solution. In stock he has 20% and 35% acid solutions. How many liters of each in stock mixture should he mix tp prepare a 300-liter mixture?

asked by Anonymous on October 11, 2015
99. ## chemistry

I am a freshman in college, and am taking a placement test soon, but haven't seen chemistry since 10th grade. I'd appreciate any help I can get from anyone here to help me solve this problem: Hydrogen and sulfur chemically combine to form the gas hydrogen

asked by John on January 5, 2012
100. ## Health

1). Explain the relationship between the key terms in each of the following. a. direct pressure and indirect pressure b. goal and action plan A: a. Direction pressure is the pressure that results from someone who tries to convince you to do something you

asked by Anonymous on October 17, 2013