Thursday
July 24, 2014

Search: pressure of 1.57 x 105 Pa and an area of 1.1 m2 and given that the acceleration due to gravity is 9.8 m/s2, what is the mass of this column?

Number of results: 19,876

chemistry
What is the effect of the following on the separation of the mixture(hexane and toluene)? a. A soluble, nonvolatile impurity b. a decrease in barometric pressure c. an increase in barometric pressure d. rapid heating rate
October 9, 2010 by Anonymous

chemistry
What is the effect of the following on the separation of the mixture(hexane and toluene)? a. A soluble, nonvolatile impurity b. a decrease in barometric pressure c. an increase in barometric pressure d. rapid heating rate
October 14, 2010 by Anonymous

chemistry
What is the effect of the following on the separation of the mixture(hexane and toluene)? a. A soluble, nonvolatile impurity b. a decrease in barometric pressure c. an increase in barometric pressure d. rapid heating rate
November 8, 2010 by Anonymous

Chemistry HELP!!
A mixture of 0.154 moles of C is reacted with 0.117 moles of O2 in a sealed, 10.0 L vessel at 500 K, producing a mixure of CO and CO2. The total pressure is 0.640 atm. What is the partial pressure of CO?
March 31, 2011 by Toni Jones

physics
Consider an airplane with a total wing surface of 90 m^2. At a certain speed the difference in air pressure below and above the wings is 4.2% of atmospheric pressure. Find the lift on the airplane.
March 28, 2012 by Kristie

physics
4 Consider an airplane with a total wing surface of 90 m^2. At a certain speed the difference in air pressure below and above the wings is 4.2% of atmospheric pressure. Find the lift on the airplane.
March 31, 2012 by Jim

physics
Consider an airplane with a total wing surface of 90 m^2. At a certain speed the difference in air pressure below and above the wings is 4.2% of atmospheric pressure. Find the lift on the airplane.
March 31, 2012 by christy

Chemistry
Would you expect the pressure of a 12.5 mL syringe of natural gas to be the same as the pressure of 12.5 mL of air? In other words, is Boyle's Law dependent on the type of gas that is being measured?
February 26, 2013 by Margaret

Physics HELP!!!!!!!!
Suppose 0.021 mole of an ideal monatomic gas has a pressure of 1.00 atm at 273.15 K and is then cooled at constant pressure until its volume is reduced by 41.1 %. What is the amount of work done by the gas?
May 11, 2014 by suzan

last physics problem.
At 25.0 m below the surface of the sea(density=1025 kg/m^3) where the temperature is 5.00 C, a diver exhales an air bubble having a volume of 1.00 cm^3. If the surface temperature of the sea is 20.0 C, what is the volume of the bubble just before it breaks the surface? You ...
April 19, 2007 by jean

Dr. Bobb222
When you get a chance: If the pure liquid vapor pressure of benzene is 155 torr and the pure liquid vapor pressure of chloroform is 333 torr, then what is the total vapor pressure at 30C of a solution of 9.26 g of benzene (C6H6) and 4.26 g of chloroform (CHCl3)? I get 195torr.
August 5, 2013 by Devron

physics ..PLEASE HELP ASSIGN DUE SOON :(
A microphone has an area of 3.0cm^2. It receives during a 6.00s time period a sound energy of 1.0x10-11J. What is the intensity of the sound? b). Using the intensity in the previous question, what is the variation of pressure in the sound wave if the speed of sound is 343m/s ...
November 24, 2012 by sarah

Chemistry
A XX-g sample of methane, CH4, is mixed with YY atm of O2 (an excess) in a VV L combustion chamber at 125.0C. The combustion reaction to CO2 and H2O is initiated and the vessel is cooled back to 125.0C. What is the final pressure in the combustion chamber assuming the ...
February 25, 2007 by Jack

Math
Find the Maximum area for the given perimeter of a rectangle. State the length and width of the rectangle. 28 inches Well, finally a calculus problem. Ok, we know that the area for a rectangle is A=l*w and the perimeter is P=2(l+w) In this problem P= 28, so let's express one ...
August 31, 2006 by l

Chemistry
The hydrogen in an eudiometer has a volume of 80 ml when the pressure is 740 mm. what's its volume at standard pressure?
May 6, 2010 by Kevin

Science
if a pressure of 10 psi on a volume of 5"^3 is reduced to 2 psi, by what factor does the pressure change?
October 26, 2010 by Loren

Ellison
Divers know that the pressure exerted by the water increases about 100 kPa with every 10.2 m of depth. This means that at 10.2 m below the surface, the pressure is 201 kPa; at 20.4 m below the surface, the pressure is 301 kPa; and so forth. If the volume of a balloon is 2.2 L ...
February 17, 2013 by AK

Physics
A 1-m-tall barrel is closed on top except for a thin pipe extending 4.8m up from the top. When the barrel is filled with water up to the base of the pipe (1 m deep) the water pressure on the bottom of the barrel is 10 kPa. What is the pressure on the bottom when water is added...
August 9, 2013 by Mily

Chemistry
How would I graph this: (I dont understand the whole with [1/volume] (units=1/mL) on the X-axis ) According to Boyle's Law, pressure is inversely proportional to volume, so prepare a graph of the data, with [1/volume] (units=1/mL) on the X-axis and pressure (atm) on the Y-axis...
April 17, 2014 by Ally

Algebra
The pressure of a gas varies jointly as the amount of the gas (measured in moles) and the temperature and inversely as the volume of the gas. If the pressure is 975 kPa(kiloPascals) when the number of moles is 4, the temperature is 250 K, and the volume is 320 cc, find the ...
December 5, 2012 by Nicole

chem - pressure
A closed vessel with volume of 226.9mL initially contained air at 680.8mmHg at 16.5 degrees celcius. A sample of an organic liquid of mass 0.113g was injected into the flask which was then warmed to 124.9 degrees celcus causing all the organic liquid to vaporise. The final ...
March 31, 2010 by T

math
The area of some shape varies directly with the square of its side. If a shape with 2cm sides has an area 10cm^2,what would be the area of a shape ofthe same type with side of 3cm.
May 21, 2011 by leroy

calculus
1.Ruth has 240 feet of fencing available to enclose a rectangular field. Express the area A of the rectangular field as a function x, where x is the length of the field. 2. For what value of x is the area largest? 3. What is the maximum area?
June 20, 2013 by tiffany

Chemistry
A 260-ml flask contains pure helium at a pressure of 756torr . A second flask with a volume of 470ml contains pure argon at a pressure of 717 torr . A)If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium? B)If ...
October 16, 2009 by Rose

Chemistry
Divers know that the pressure exerted by the water increases about 100 kPa with every 10.2 m of depth. This means that at 10.2 m below the surface, the pressure is 201 kPa; at 20.4 m below the surface, the pressure is 301 kPa; and so forth. If the volume of a balloon is 3.2 L ...
March 2, 2014 by Angela

Science
A cylinder and an airtight piston are used in the following experiment. The piston is pushed up and down in the cylinder and the resulting pressure of the air inside the cylinder is measured with a pressure gauge. The results of the experiment are recorded in the following ...
July 13, 2014 by dulce

chemistry
A 500. mL sample of hydrogen gas is collected over water at 27 C. The pressure of the hydrogen and water vapor mixture is 78.5 kPa and the vapor pressure of water at 27 C is 3.6 kPa. What is the partial pressure of the dry hydrogen gas?
February 23, 2014 by Gabby

chem 102
Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.1L of water upon warming from 25 ∘C to 50 ∘C. Assume that the water is initially saturated with nitrogen and oxygen gas at 25 &#...
February 18, 2014 by ieshia

science; AP Chem
Divers know that the pressure exerted by the water increases about 100 kPa with every 10.2 m of depth. This means that at 10.2 m below the surface, the pressure is 201 kPa; at 20.4 m below the surface, the pressure is 301 kPa; and so forth. If the volume of a balloon is 3.9 L ...
September 14, 2012 by Anonymous

8th Grade math - Ms. Sue please
An archaeologist has set up a dig at a newly discovered site. She and her team start excavating an area that is 36 feet by 24 feet. Because the scientists find many artifacts near the edges of this area, they decide to expand the dig. They add nine feet in all directions to ...
November 16, 2012 by Chris

(:
help with Quadratic Equations and Functions: 5)Solve 2x2 +6x = 4 by completing the square. 6)Solve 3x2 - 6x- 24 = 0 using the quadratic formula. 7)The area of a circle is 25 in2. What is the radius, including the units? Area of a circle is r^2. 8)The triangle has an area of ...
May 20, 2012 by neveah gomez

Geometry/Trig
Hello, I would appreciate it if... 1. If you could give me information on finding the area of a circle inscribed in an equilateral triangle. 2. This problem: A running track is shaped like a rectangle with a semicircle on each of the shorter sides. The distance around the ...
October 10, 2006 by Lisa

Chem B
The air in a dry, sealed 2L soda bottle has a pressure of 0.998 atm at sea level at a temperature of 34C. what will be it's pressure, if it is brought to higher altitude where the temperature is only 23C?
April 5, 2010 by Courtney

Chemistry
A mixture of gases containing equal weights of carbon dioxide, carbon monoxide, and ammonia exerts an overall pressure of 450.0 torr. What pressure is exerted by each gas individually??
May 29, 2010 by jessica

physics
The pressure under the surface of a liquid increases with depth. Determine the pressure in Newtons per square meter on a lake at a depth of 100 meters (over 300 feet).
March 8, 2012 by sierra

Chemistry.
To calculate the air pressure, the volume occupied by the air is assumed constant. Why is this assumption incorrect? Explain how the vapor pressure calculated and the resulting Clausius-Clapeyron plot are affected?
October 16, 2012 by Shardae.

Chemistry.
To calculate the air pressure, the volume occupied by the air is assumed constant. Why is this assumption incorrect? Explain how the vapor pressure calculated and the resulting Clausius-Clapeyron plot are affected?
October 16, 2012 by Shardae.

Chemistry
A pressurized can of whipped cream has an internal pressure of 1.080 atm at 25C. If it is placed in a freezer at -8C, what is the new value for its internal pressure (in atmospheres)? I did this but got a negative number that wasnt correct
November 1, 2012 by Brandon

Chemistry
If a sample of gas occupies 2.1 ml at a pressure of 896 torr, what volume (ml) will it occupy at a pressure of 316.8 torr. I really need an answer, but also please show me how to work this problem.
March 25, 2013 by Linzy

Physics
HELP!!! Consider an airplane with a total wing surface of 140 . At a certain speed the difference in air pressure below and above the wings is 3.0 of atmospheric pressure.Find the lift of the airplane
April 9, 2013 by Ericca

math
Wich if the given numbers are composite?15,19,23,31,49,55,59,87,91,97,103,105
February 4, 2008 by Sue

Com 105
What are the best prewriting techniques to use for a team?
April 23, 2010 by Anonymous

Science
What mammal order has the dental formula 205/105?
May 4, 2010 by Sean

Math 105
Identify the property that justifies the statement 1q equal q
September 4, 2010 by Shelia

Math
what is 105,219 rounded to nearest hundres thousand
September 16, 2010 by Misty

math
what is the 50 term of the arithmetic which begins with 20 is 105? what is the common difference?
December 6, 2010 by john

Math
Evaluate: 7^C4 i think its something like: (7*6*5*4*3*2*1) / ((2*1)(4*3*2*1)) = (7*6*5*4)/(4*3*2*1) = (7*6*5)/(2*1) = 105...did i do i right??
July 29, 2011 by Jen

soc/105
what are the different ways that you consume popular culture?
August 8, 2011 by Anita

math
the folowing equation 9+8x7-6x5+4x3+2=105 How do u get this?
October 19, 2011 by don

EXP 105
I need help on how to write a practical context paragraph
February 10, 2012 by Maryann

Math
I have a question, how would I get the scale for these measurements? 105 x 15 27 x 17 72 x 38
December 10, 2012 by Rebecca C

physics
What is the average speed of the car during the first 105?
March 30, 2013 by Anonymous

Alegbra
Compute and write your answer in scientific notation. 8.2 x 105 2.75 x 10-3
March 10, 2014 by Steveo

Alegbra
Compute and write your answer in scientific notation. 8.2 x 105 2.75 x 10-3
March 16, 2014 by WillyB

math 1 question!!!!!!
3. Which ordered pair is NOT a solution of y= 12x 3? A. (-3, 33) B. (8,-98)<----?? C. (-9, 105) D. (3, -39)
May 31, 2014 by Anonymous

chem
Ive already checked it DrBob222 that's the problem the teacher gave. Here's the complete problem : Exhaled breathe is a mixture of Nitrogen, oxygen, carbon dioxide and water vapor. What is the partial pressure of CO2(torr) in exhaled breathe at 37.0 degree C if the partial ...
October 26, 2012 by Carina 78

Chemistry;HELP
Correct the following samples of gases to standard temperature. (Assume pressure is constant)(STP stands for standard temp and pressure which is 273K and 101.3 kPa, you do not have to think about the pressure for these four but on the last three you will have to so T2 is 273K...
August 20, 2013 by Unknown

8th grade
Major League Baseball is divided into the National League and the American League. The World Series championship is a best-of-seven series between the National League champion and the American League champion; the first team to win four games wins the series. Between 1903 ...
October 13, 2010 by pow

chem
If an ideal gas is allowed to expand into a vacuum, this means that the external pressure is 0. This doesn't affect the internal pressure though, correct? For example: I have a problem in which one mole of an ideal gas at 300. K and at a volume of 10.0 L expands isothermally ...
March 6, 2007 by Chris

math
surface area of a rightcircular cylinder. The area of a right circular cylinder is given by the polynomial 2pierh^2 where h is the height and r is the radius of the base. Suppose that a beverage can has a height of 6.2 inches and a radius of 1.3 inches. Evaluate the polynomial...
March 22, 2013 by pam

math
Calculate the value of the following in exponential form, using standard scientific or "e" notation (for example, 105 = 1.05e2). Enter your answer with the correct number of significant figures. 885.75 g + 10.151 g - 25.50 g Calculate the value of the following in exponential ...
September 23, 2010 by help?

Chemistry
I really don't get this. The calculations shown don't make sense. Demonstrate that work is not a state function by calculating the work involved in expanding a gas from an initial state of 1.00: and 10.0atm of pressure to (a) 10,0 L and 1.0 atm pressure. (b) 5.00L and 2.00 atm...
November 28, 2008 by Xi

physics
a weather balloon carries instruments that measure temperature,pressure and humidity as it rises through the atmosphere.Suppose such a balloon has a volume of 1.2 m^3 at sea level where the pressure is 1 atm and the temperature is 20 degree Celsius.When the balloon is at an ...
November 1, 2011 by jennaq

chemistry
A fixed amount of gas initially at 100 K and pressure P1 is expanded from 1 L to 100 L in a piston. The temperature, T2, of the gas at this point is 50 K. The piston is then locked at constant volume V2=100 L and half the gas is pumped out at a constant temperature of T2 . The...
December 5, 2011 by laura

Physics
A piston contains 1m^3 of helium at a temperature of 250 K and an absolute pressure of 1.0kPa. The following changes are made in sequence: (a) First the volume of the piston is decreased to 0.2 m^3 while the temperature is kept constant, what is the pressure of the gas? (b) ...
February 17, 2011 by Pressure of gas

Math
The area of a 25 inch TV screen is 300 square inches. The area of a 40 inch TV screen is 768 square inches. The area of the smaller screen is what percent of the area of the larger screen? Please and thanks!
November 4, 2008 by Shania

chem word problem
.If a gas is cooled from 323.0 K to 273.15 K and the volume is kept constant, what final pressure would result if the original pressure was 750.0 mm Hg? Round to the nearest tenth. Don't forget the units. what should i plug in?
May 23, 2013 by ray

chemistry
Two liquids A and B on mixing form an ideal solution. The vapour pressure of the solution containing 2 moles of A and 4 moles of B is 0.2 atm. If the vapour pressure of pure A at a certain temperature is 0.3 atm then what will be the vapour pressure of pure B at that temperature?
May 28, 2013 by Adnan

Physics
A barge with mass 1.7105 kg is proceeding down river at 6.1 m/s in heavy fog when it collides broadside with a barge heading directly across the river. The second barge has mass 2.83105 kg and was moving at 4.2 m/s. Immediately after impact, the second barge finds its course...
November 3, 2009 by Rachel

Chemistry Lab+Help
Okay, basically what we did in the lab was fill up an empty soda can with about 5mL of water, and we had to heat it up to a boiling point. After that we turned the soda can upside down into a beaker with cold water. After a minute or so, the can just snapped in half. I have to...
March 22, 2009 by Chopsticks

Physics
(a) An ideal gas occupies a volume of 1.6-cm3 at 20C and atmospheric pressure. Determine the number of molecules of gas in the container. (b) If the pressure of the 1.6-cm3 volume is reduced to 1.6 10-11 Pa (an extremely good vacuum) while the temperature remains constant, ...
April 25, 2010 by Kelsey

Math
Find the surface area of rectangular pyramids 1. Length= 1.15ft Width=0.82 ft Height of the slanted face =3.17ft Surface Area=7.1879ft^2 Formula for Rectangular Pyramid Surface Area : B+1/2pl B=area of base p=perimeter of base l=height of slanted face
February 5, 2014 by Jerald

calculus
Find the lenght of the sides of an isosceles triangle with a given perimeter if its area is to be as great as possible. let k be the the length of the two iso sides, so the other side is P-2k. Call that the base. Using Heron's formula: Area=SQRT(s(s-a)(s-b)(s-c)), but s= P/2...
March 9, 2007 by amy07

math
which has the greater area? explain. a) a rectangle with area 0.84 meters square. b) a rectangle with area 8400 centimeters square
March 2, 2012 by junaid

derivatives
Applications of derivatives A rectangle has its base on the x axis and its upper two vertices on the parabola y=12 - x^2. What is the largest area the rectangle can have, and what are its dimensions. Support your answer graphically. Thanks. Well, the parabola is symettric ...
November 18, 2006 by Jen

Gen Chem 1
We want to change the volume of a fixed amount of gas from 745mL to 2.30L while holding the temperature constant. To what value must we change the pressure if the initial pressure is 102 kPa?
October 26, 2010 by Kay

meteorolgy
Compute the relative humidity (RH) to nearest percent for each of the following atmospheric conditions: (Round to one decimal place, do not include units.) b. vapor pressure = 4 mb, saturation vapor pressure = 16 mb, RH = _________%
June 15, 2011 by Anonymous

Math
A hurricane wind blows across a 6.00 m times 15.0 m flat roof at a speed of 190 km/hr. Is the air pressure above the roof higher or lower than the pressure inside the house? Explain. Need help
August 14, 2011 by Catie

chem
.If the pressure of the gas in a 2.31 L balloon is 0.120 atm and the volume increases to 7.14 L, what will be the final pressure of the air within the balloon? Round to the nearest hundredth. Don't forget the units. i really tried but i need help
May 23, 2013 by nene

chemistry
A 28.4 L sample of methane gas is heated from 35.0 C to 76.0 C. The initial pressure of the gas is 1.00 atm at 35.0 C. Assuming constant volume, what is the final pressure of the gas
November 20, 2011 by sandy

chemistry
A deep sea diver uses a gas cylinder of 10.0 L and a content of 51.4 g of O2 and 32.5 g of He. Calculate the partial pressure of each gas and the total pressure of the temperature of the gas is 16 C.
July 3, 2014 by rtt

Astronomy
The latent heat of melting is the amount of energy needed to convert a solid substance at its melting temper- ature to a liquid at the same temperature. For typical volcanic rocks, the latent heat of melting is around 5105 J/kg, which means it takes 5105 J to turn 1 kg of ...
April 9, 2009 by Ashley

Educational Technology
What does it mean to say that a country's land area is positively correlated with its population? a) The larger the land area of a country, the higher its population tends to be. b) The smaller the land area of a country, the higher its population tends to be. c) There is no ...
November 21, 2013 by Dayana

math 209
Area of a sail. The area in square meters for a triangle is given by A(x)=x^2 +5x +6. a.) Find A(5) b) if the height of the sail is x+3 meters, then what is the length of the base of the sail when area is x^2 +5x+6m^2?
June 22, 2009 by trina

Geometry
Find the area of a decagon with side of 4cm. Find the area of a pentagon with side length of 10cm Find the area of a hexagon with radius of 5in.
April 15, 2012 by Jill

Chemistry
A solution of NaCl in water has a vapor pressure of 18.1 torr at 25 degrees C. What is the mole fraction of NaCl solute particles in this solution? What is vapor pressure at 45 degrees C? Vapor pressure of pure water is 23.8 torr at 25C and 71.9 torr at 45C, assume ions are Na...
March 7, 2010 by Sara

chemistry
ind the partial pressure of oxygen in a sealed vessel that has a total pressure of 2.6 atm and also contains carbon dioxide at 1.2 atm and helium at 0.10 atm.
May 4, 2010 by jerkoff

algebra help please
The area of a rectangle of length x is given by 3x^2+5x find the width of the rectangle a=l*w =x*(3x+5) I stoped here I am not sure if I am correct i was taken the 3x+5 as the width and x as the length but i am not sure if the 3x+5 should be the area and divid by x the length ...
April 24, 2007 by larry

physics
What is the pressure at the bottom of a river (12 m deep) if the air pressure over the river is 98.23 kPa? The density of the river water is 988 kg/m3.
December 15, 2011 by dan

physics
What is the pressure at the bottom of a river (12 m deep) if the air pressure over the river is 98.23 kPa? The density of the river water is 988 kg/m3.
December 15, 2011 by dan

Chemistry
The following reaction has Kp = 109 at 25C. 2 NO(g) + Br2(g) 2 NOBr(g) If the equilibrium partial pressure of Br2 is 0.0159 atm and the equilibrium partial pressure of NOBr is 0.0768 atm, calculate the partial pressure of NO at equilibrium.
January 8, 2012 by Ferdinand

AP Chem
The following reaction has Kp = 109 at 25C. 2 NO(g) + Br2(g) 2 NOBr(g) If the equilibrium partial pressure of Br2 is 0.0159 atm and the equilibrium partial pressure of NOBr is 0.0768 atm, calculate the partial pressure of NO at equilibrium.
January 8, 2012 by Bill

Math
Find the area of a regular pentagon if its apothem is approximately 4 ft long and each of its sides are 5.8 ft long. So I tried dividing the pentagon into triangles...but then I came up with the answer 24.41? I know thats not right. Can you hLep me at all? I will be happy to ...
June 4, 2007 by Emily

math
Aerosol cans carry clear warnings against incineration because of the high pressures that can develop upon heating. Suppose a can contains a residual amount of gas at a pressure of 755 mm Hg and a temperature of 25 C. What would the pressure be if the can were heated to 1155 C?
January 29, 2011 by Anonymous

chemistry
Aerosol cans carry clear warnings against incineration because of the high pressures that can develop upon heating. Suppose a can contains a residual amount of gas at a pressure of 755 mm Hg and a temperature of 25 C. What would the pressure be if the can were heated to 1155...
January 31, 2011 by Anonymous

chem
A liquid that has an equilibrium vapor pressure of 129 torr at 25C is placed into a 1-L vessel like that shown below. A few mL of the liquid is introduced into the vessel at 25C while it has a pressure of 1.00 atm of air in it, without allowing any of the air to escape. ...
January 10, 2013 by Samantha

Physics
Some hydrogen gas is enclosed within a chamber being held at 200C with a volume of 0.025m^3. The chamber is fitted with a movable piston. Initially, the pressure in the gas is 1.50*10^6 Pa (14.8 atm). The piston is slowly extracted until the pressure in the gas falls to 0.95...
August 14, 2011 by Lizzie

Arithmetic
How can we put parentheses around the following expression so that the answer is 105? 9 + 8 x 7 - 6 x 5 + 4 x 3 + 2
November 18, 2008 by Sonya

chem
a soln. that is .195 M in CH3NH2 and .105 M in CH3NH3Br what is the balanced equation for this ? How do you know ?
March 8, 2009 by natash

english 105
Why Should one know the difference between prejudice and racism?
February 10, 2011 by natalie

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