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March 29, 2017

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Number of results: 65,043

Chemistry
How would i figure out the vapor pressure at room temperature? (atmospheric pressure is 760 mm hg and the temperature is 20C.)
February 11, 2008 by Anonymous

Chemistry
A sample of gas exerts a pressure of 5.12 atm. What is the pressure of this gas expressed in torr? (3 significant figures, n.nnEn)
March 27, 2010 by Monica

Chemistry
A pressurised can of whipped cream has an internal pressure of 1.33x105 Pa at 25.0 oC. If it is placed in a freezer at -15.0 oC, what is the new value for its internal pressure (in Pa)?
April 28, 2010 by Alex

chemistry
if .55 grams of a gas dissolves in 1 liter of water at 20 kPa of pressure, how much will dissolve at 110 Kpa of pressure?
March 28, 2011 by Anonymous

Chemistry
A sample of gas is placed in a container at 25 degrees C and 2 atm of pressure. If the temperature is raised to 50 degrees C, what is the new pressure?
February 17, 2011 by Cat

chem
at 40 degree C , the vapour pressure of water is 55.3 mm of hg. calculate the vapour pressure at same temp. of 10%aques solution of urea??
June 7, 2011 by niki

pressure
4 mL of gas in a piston (syringe) at 10oC and 0.75 atm is heated and expanded to 85oC and 8 mL. What is the pressure of the gas after the expansion?
November 6, 2011 by nja

Chemistry
A sample of helium has a volume of 325mL and a pressure of 655mmHg. What wll be the pressure if the helium is compressed to 125mL (T constant)?
October 9, 2012 by Mel

phyiscal chemistry
Moving from solid to liquid by changing the pressure, so what happend if u decrease the pressure on a solid at constant temperature?
October 18, 2012 by Lisa

Chemistry
The solubility of a gas at 7.0 atm of pressure is 0.52 g/L . How many grams of the gas would be disolved per 1.0 L if the pressure increased 40.0 percent?
March 4, 2013 by Joy

chemistry
If methane at a pressure of 3.2 atm and at 21 °C is introduced into a container, the gas be heated to ______°C to increase the pressure to 12 atm.
March 5, 2013 by kelvin

chemistry
a gas with a volume of 4.00 L at pressure of 205kPa is allowed to expand to a volume of 12.0L. what is the pressure in the container if the temp remains constant
March 19, 2014 by Anonymous

Chemistry
A gas is bubbled through water at a temperature of 30°C and at an atmospheric pressure of 100.2 kPa. What is the pressure of the dry gas?
March 28, 2016 by jinal

Chemistry
A gas occupies a volume of 4.64 x 102 mL at 519.57 mm Hg pressure. What will be its volume, at constant temperature, if the pressure is changed to 764.71 mm Hg?
April 27, 2016 by Alex

chemistry
The pressure of the earth's atmosphere at sea level is 14.7 lb/in2. What is the pressure when expressed in kg/m2? (2.54 cm = 1 in., 2.205 lb = 1 kg) 2.62×102 kg/m2 5.02×104 kg/m2 4.30×10-3 kg/m2 2.09×10-2 g/m2 1.03×104 kg/m2
May 15, 2016 by Ha

Idontgetit
The value of the equilibrium constant, Kc, at a certain temperature is 2.50 x 102. If the reaction quotient for a mixture of these species at the same temperature is found to be 7.37 x 100, would the mixture yield more products, more reactants or is it at or near equilibrium? ...
October 2, 2013 by Chemistry

Chemistry
Two flasks containing the same inert gas are at the same temperature and pressure of 800. mm Hg. One flask is injected into each of the flasks to allow phase equilibrium to be established. No leakage occurs. If the pressure in the 1.0 L flask is 900 mm Hg, what is the pressure...
January 31, 2007 by Jason

Physics
Nitrogen gas is introduced into a large deflated plastic bag. No gas is allowed to escape, but as more and more nitrogen is added, the bag inflates to accommodate it. The pressure of the gas within the bag remains at 1 \rm atm and its temperature remains at room temperature (...
September 1, 2010 by Todd

math
Air pressure at sea level is 30 inches of mercury. At an altitude of h feet above the, air pressure, P, in inches of mercury, is given by, P =30e^(-3.23x10-5h) a)Find th equation of the tangent line at h=0. b)A rule of thumb is given by travelers is that air pressure drops ...
August 7, 2015 by farjana

chem
A 0.70 g mixture of Cu and CuO was treated with hydrogen at elevated temperature. CuO was reduced to Cu and water was formed. (a) Write a balanced equation for the reaction. (2 marks) (b) Before the experiment, calculate the minimum amount (in mole) of hydrogen required to ...
October 12, 2016 by lightningtx

Basic Chemistry
What is the pressure of 64.0 g of oxygen gas in a 1.50-L container at -37°C a. 4.12atm b. 51.6atm c. 19.6atm d. 8.2atm
December 5, 2011 by Tasha

chemistry
The laboratory tech accidentally mixed NaHCO3 with BaCl2-2H2O instead of KCl when preparing unknown mixture for this experiment. How would this mistake affect the calculated percentage of NaHCO3 in the mixture? Justify answer with an explanation. Is it still possible to ...
February 2, 2014 by Sandy

Physics
Water flows at 12 m/s in a horizontal pipe with a pressure of 3.0 x 10 4 N/m2 . If the pipe widens to twice its original radius, what is the pressure in the wider section?
January 11, 2010 by lupe

physics
100cm3 of air at 10 degree centigrade is heated to 80 degrees centigrade.What will be the new volume of the pressure that remains as atmospheric pressure?
March 12, 2010 by alee

chemistry
A pressurised can of whipped cream has an internal pressure of 1.09x105 Pa at 25.0 oC. If it is placed in a freezer at -15.0 oC, what is the new value for its internal pressure (in Pa)? explain to me! thanks
May 1, 2010 by write2khin

Chemistry
A 230. mL air sample collected at 35°C has a pressure of 550. torr. What pressure will the air exert if it is allowed to expand to 425 mL at 60.°C?
April 14, 2011 by Mary

Chemistry
a sample of gas has the pressure of 1120 mmhg and volume of 2.00 L. if the pressure is changed to 0.155 atm calculate the new volume
November 29, 2011 by erica

chemestry
What volume will 300 ML of gas at 20 degrees C and a pressure of 335 mm Hg occupy if the temperature is reduced to -80 degrees C and the pressure increased to 760 mm Hg?
December 2, 2011 by laquanda

chemistry
the volume at s.t.p. occupied by a gas q originally occupying 153.7 cc at 287 k and 750mm pressure, vapour pressure of gas q at 287k is 12 mm of hg
June 28, 2012 by Mayank Goswami

Science
What is the final pressure of the gas relative to its initial pressure when there is an increase in Kelvin temperature of a cylinder of compressed gas by a factor of 2.7?
October 9, 2012 by Patrick

Physics
A quantity of monatomic ideal gas expands adiabatically from a volume of 2.0 liters to 6.0 liters. If the initial pressure is P0, what is the final pressure?
February 12, 2013 by Alex

chemistry
If methane at a pressure of 3.2 atm and at 21 °C is introduced into a container, the gas be heated to ______°C to increase the pressure to 12 atm. is it 352???
March 5, 2013 by kelvin

chemistry
The temperature of an ideal gas in a 5.00 L container originally at 1.01 bar pressure and 25 °C is lowered to 220 K. Calculate the new pressure of the gas.
April 28, 2013 by Kat

chemistry
What is the final pressure gas sample that is subjected to a temperature change from 22.0 C to 30.0 C and a volume change from 85.4 L to 37.0 L with an initial pressure 105 kPa?
April 30, 2013 by SK

chemistry
the vapor pressure of water at 45.0 °c is 71.93 mmhg. Calculate the vapor pressure of a solution of 1.50 m Al(NO3)3 at this temperature (assume 100% dissociation)
July 16, 2013 by michael

chem
Calculate the final pressure, in atmospheres, for each of the following with n and V constant. A gas with an initial pressure of 1.20 atm at 82∘C is cooled to -28∘C.
November 17, 2014 by bianca Barbosa

Science
The pressure guage on the steam condenser for a turbine indicates 26.2 in. Hg of vacuum. The barometer reading is 30.4 in. What the absolute pressure in the condenser in psia?
March 26, 2015 by Man Singh Chouhan

chemistry
The barometric pressure recorded by a weather balloon is 0.731 atmoshperes (atm). Express this barometric pressure in millimeters of mercury (mm Hg).
July 28, 2015 by Mindy

Science
Fill in the blanks...Air masses MOVE from areas of ______ pressure to areas of_________ pressure.
May 29, 2008 by Matt

Chemistry
The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of the gas, assuming constant temperature?
August 28, 2008 by Soojung

CHEM
Vapor pressure is the pressure exerted by a vapor when condensation: A. < B. = C. > evaporation over its liquid in a closed system.
February 1, 2009 by joey

chemistry
water has a vapour pressure of 23.76 torr at 25C.what is the vapour pressure of a solution of sucrose ,if its mole fraction is 0.25?
June 14, 2012 by sumie

chemistry
If you calculate the density of a gallon of CO2 gas at 27degrees celcius and 0.50 atomic pressure what the atomic pressure be?
March 31, 2010 by Angela

chem
a sample of gas is compressed from 3.25 l to 1.20 l at constant temperature. if the pressure of this gas in the 3.25 l volume is 100.00 kpa, what will the pressure be at 1.20 l ?
April 5, 2010 by hasan

Chemistry
A 120. mL sample of a gas is at a pressure of 1.50 atm. If the temperature remains constant, what will be its volume at 3.50 atm of pressure?
November 30, 2010 by Kiesha

Chemistry
A 120. mL sample of a gas is at a pressure of 1.50 atm. If the temperature remains constant, what will be its volume at 3.50 atm of pressure?
December 6, 2010 by Ivy

Chem
The air pressure in a tire is 1.20 atm at 77.0 C. Find the pressure of the same amount of gas in the same volume at -12.0 C
July 11, 2011 by Sarah

chem
A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?
December 5, 2011 by laura

chem
A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?
December 5, 2011 by laura

chemistry
A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?
December 6, 2011 by laura

chemistry
A quantity of gas has a volume of 121 L when confined under a pressure of 2.50 atm at a temperature of 20.0 C. At what pressure will its volume be 30.0 L at 25.0 C?
February 24, 2012 by garrett

chem
If the pressure of the original doubles does that mean the original will decrease by 1/2? Because pressure and volume are inversely proportion to each other?
March 22, 2012 by bkue

Physics
A welding tank has a gauge pressure of 2000psi at 40.0°F. What is the new gauge pressure if the temperature rises to 100°F?
April 11, 2012 by Madison

Chemistry help!!!!
A gas occupies 200ml volume at a pressure of 760 mm. what volume would it occupy at a pressure of 800mm.
April 12, 2012 by Fatihisko

Chemistry
If the pressure of 2.50ml gas were doubled from 0.500atm to 1.00atm what would be the gas volumn at the new pressure?
September 4, 2012 by Barbara

Science
You know that a gas in a sealed container has a pressure of 111kPa at 23 Celsius. What will the pressure be if the temperature rises to 475 Celsius?
October 18, 2012 by Anna

chemistry
A constant pressure tank is filled with air at 16.7 Atm at 24C it warms to 65C, what is the tank pressure
November 7, 2012 by Arde

chemistry
A gas is collected over water at 20 degrees Celsius at a pressure of 752 mm. What is the pressure of the pure gas?
November 29, 2012 by Jill

chemistry
the vapor pressure of pure water at 60 c is 157 mmHg. what is the vapor pressure of this solution at the same temperature, in mm Hg?
August 25, 2014 by angel

Science
True or False. Winds usually move from areas of low pressure to areas of high pressure.
May 11, 2015 by Idk.

chemistry
0.197g of magnesium is burned in air 2Mg + O2 ---> 2MgO However, some of the magnesium reacts with nitrogen in the air to form Magnesium nitride instead : 3Mg + N2 --->Mg3N2 So you have a mixture of MgO and Mg3N2 weighing 0.315g.Determine what percentage of the Mg formed...
May 4, 2016 by Chansa

physics
Challenger Deep in the Marianas Trench of the Pacific Ocean is the deepest known spot in the Earth's oceans, at 10.922 km below sea level. Taking density of seawater at atmospheric pressure (p0 = 101.3 kPa) to be 1024 kg/m3 and its bulk modulus to be B(p) = B0 + 6.67(p −...
April 16, 2011 by HELP!!!!

physics
In ammonia (NH3) molecule, the three hydrogen atoms form an equilateral triangle, the distance between the centers of the atoms being 16.28x10^-11 m, so that the center of the triangle is 9.40x10^-11 m from each hydrogen atom. The nitrogen atom is at the apex of the pyramis, ...
October 10, 2011 by Brianna

physic
Question Part Points Submissions Used A hypodermic syringe contains a medicine with the density of water (figure below). The barrel of the syringe has a cross-sectional area of 2.88 10-5 m2. In the absence of a force on the plunger, the pressure everywhere is 1.00 atm. A force...
March 3, 2015 by sam

Chemistry
Suppose that a mixture of ice and water is placed in a refrigerator that is held at the freezing point of water, exactly 0.0C. Calculate deltaS for the ice-water mixture, deltaS for the refrigerator, and deltaStotal when 5.00g of ice forms. Is this process spontaneous? Is the ...
March 20, 2015 by Jenny

chemistry ........................chemistry
Sodium Na+ Intense yellow Barium Ba++ Green Calcium Ca++ Brick red Copper Cu+ or Cu++ Blue-green Strontium Sr++ ? Lithium Li+ ? Sodium and potassium mixture Na+&K :yellow light Observations using the cobalt glass filter Sodium & potassium mixture Na+&K+:reddish color Potassium...
October 15, 2012 by Maria

finitemath
a store sells cashews for $5.00 per pound and peanuts for $1.50 per pound. the manager decides to mix 30 pounds of peanuts with some cashews and sell the mixture for $3.00 per pound. how many pounds of cashews should be mixed with the peanuts so that the mixture will produce ...
June 23, 2010 by sha

Chemistry
How many liters of excess reactant would be left when 3.00 liters of nitrogen monoxide is mixed with 2.00 liters of oxygen and allowed to react at 695 torr and 27 degrees Celsius to produce nitrogen dioxide
July 26, 2011 by Andy

Physics _ Please please help
The cross-sectional area of the U-tube shown below is uniform and is equal to one square centimeter (1.00cm^2). One end is open to the atmosphere. Atmosphere pressure may be taken as P1=1.01 * 10^5 Pa. The other end of the U-tube is connected to a pipe in which a constant gas ...
August 10, 2011 by Sonya

chemistry
Give the mass in grams of diphosphorus pentoxide that contains 2.0 x 10^(24) oxygen atoms.
October 4, 2011 by miriam

Statistics
Jim's systolic blood pressure is a random variable with a mean of 145 mmHg and a standard deviation of 20 mmHg. For Jim's age group, 140 is the cutoff for high blood pressure. If Jim's systolic blood pressure is taken at a randomly chosen moment, what is the probability that ...
September 17, 2014 by Loray

chemistry
At 650 degree C and a pressure of 690mm HG, the 0.927g sample has a volume of 194cm3. How do I calculate the volume at the same temp but at a pressure of 760mm Hg? Also, how do I calculate the volume at the same pressure but at a temp of 0 degree C? Thanks if it is a gas, you ...
February 26, 2007 by sarah

Chemistry
The following reaction was monitored as a function of time: AB--->A+B A plot of 1/[AB] versus time yields a straight line with slope 5.2×10−2 . If the initial concentration of is 0.240M , and the reaction mixture initially contains no products, what are the ...
July 18, 2010 by Ellen

Chemistry
Carbon monoxide and chlorine gas react to form phosgene: CO(g)+Cl2(g)⇌COCl2(g) Kp = 3.10 at 700 K If a reaction mixture initially contains 319torr of CO and 220torr of Cl2, what is the mole fraction of COCl2 when equilibrium is reached?
February 16, 2014 by Morgan

physics
A hypodermic syringe is attached to a needle that has an internal radius of 0.303 mm and a length of 3.02 cm. The needle is filled with a solution of viscosity 2.00 10-3 Pa · s; it is injected into a vein at a gauge pressure of 16.1 mm Hg. Ignore the extra pressure required ...
March 22, 2013 by ray

physics
Many of you may have noticed the phenomenon that basketballs get flat if the weather is cold. If a basketball was inflated to a gauge pressure of 60,000 Pa when the temperature outside was 20∘C, what is the gauge pressure inside the basketball in Pa when the ...
May 27, 2013 by stranger

Math
air pressure decreases during a storm. the difference between the normal air pressure n and the air pressure during the 1935 florida keys hurricane wasd greater than 121 millibars. write and solve the inequality to find the normal airpressure in the florida keys before the ...
March 9, 2015 by Angelina

Math
air pressure decreases during a storm. the difference between the normal air pressure n and the air pressure during the 1935 florida keys hurricane wasd greater than 121 millibars. write and solve the inequality to find the normal airpressure in the florida keys before the ...
March 9, 2015 by Angelina

math
air pressure decreases during a storm. the difference between the normal air pressure n and the air pressure during the 1935 florida keys hurricane wasd greater than 121 millibars. write and solve the inequality to find the normal airpressure in the florida keys before the ...
March 9, 2015 by Angelina

Physics
I want to calibrate a barometer using current pressure. I live in a town with altitude 540m (at the top of an escarpment) but the closest internet pressure readings are from a town which is 50m above sea level(at the bottom of the escarpment). Assuming the temperature varies ...
July 8, 2015 by Bob

physics
Ice at -10degrees celcius and steam at 130 degrees celcius are brought together at atmospheric pressure in a perfectly insulated container. After thermal equilibrium is reached,the liquid phase at 50 degrees celcius is present. Ignoring the container and the equilibrium vapor ...
April 18, 2012 by Elifolet

Chemistry
A sample of nitrogen gas at 298 K and 745 torr has a volume of 37.42 L. What volume will it occupy if the pressure is increased to 894 torr at constant temperature?
July 11, 2011 by Jacob

physics
Three moles of nitrogen gas, N2, at 26.8 ◦C are contained in a 35.8 L cylinder. Find the pressure the gas exerts on the cylinder walls. Answer in units of Pa
April 26, 2013 by Anonymous

chemistry
A sample of gas occupies 29 L under a pressure of 1.3 atm. What would the resulting volume be if the pressure were increased to 3.9 atm if the temprature did not change?
April 15, 2008 by riya

Chemistry
A 12.7 L sample of gas is under a pressure of 740 mm Hg at 20degrees C. What will be the volume of the gas if the pressure increases to 1.00 atm and the temperature drops to 0 degrees C
January 20, 2009 by Mary

chemistry
an organic sbstance has an enthalpy of vaporization of 29.0 kl/mol. the compound has a vapor pressure of524 mm HG at 25 C. at what tempurture is the vapor pressure equal to 115mm HG?
June 12, 2010 by nancy

chemistry
A rigid ball that contained 25.0 liters of air at 22°C and 6.25 atm pressure was placed in an oven at a temperature of What was the new pressure inside the ball
July 8, 2010 by Anonymous

chemistry
A sample of gas weighing 9.0 (g) at a pressure of 1 atm occupies a volume of 12.3 L. If the pressure is doubled,what is the resulting volume? (Assume constant temperature)
October 18, 2010 by Dakota

chemristy
A sample of gas occupies 18 L under a pressure of 1.3 atm. What would the resulting valume be if the pressure were increased to 3.9 atm if the temperature did not change?
November 22, 2010 by kevin bolton

conceptual chemistry
the density of air at 25dergees C and 1 atmosphere of pressure is about 1.18 g/L. What happens to the dnesity of air as the temperature is increased. When the pressure is incrased?
February 16, 2011 by Eileen

chemistry
a quantity of gas is collected over water at 15C. The manometer indicated a pressure of 24.0kPa. what would be the pressure of the dry gas?
February 24, 2012 by garrett

Physics
Some air at 275 kPa absolute pressure occupies 50.0m^3. Find its absolute pressure if its volume is doubled at constant temperature.
April 11, 2012 by Madison

phy
Some air at 275 kPa absolute pressure occupies 50.0m^3. Find its absolute pressure if its volume is doubled at constant temperature.
April 11, 2012 by Ricky

Chem II
A sample of gas in a 25.0-L containter exerts a pressure of 3.20 atm. Calculate the pressure exerted by the gas if the volume is changed to 45.0-L at constant temperature.
October 12, 2012 by Layney

Chemistry Lab
Hydrogen gas was collected over water in a eudiometer at 26 degrees celcius when the atmospheric pressure was 756 mm Hg. What was the pressure of the H2 gas?
October 15, 2012 by Heather

Chemistry
A pressurized can of whipped cream has an internal pressure of 1.080 atm at 25°C. If it is placed in a freezer at -8°C, what is the new value for its internal pressure (in atmospheres)?
November 1, 2012 by Brandon

Chemistry
Find molality of a solution containing non - volatile solute if its vapour pressure is 2% below the vapour pressure of pure water
February 1, 2013 by Jashan Gill

physics
If you dive to a depth of 10m below the surface of a lake, Part A what is the pressure due to the water alone? What is the absolute pressure at that depth?
April 10, 2014 by bety

chem
Baking powder consists of 4 ingredients – CaHPO4, NaAl(SO4)2, NaHCO3 and cornstarch. Using the guidelines below, determine the masses of each ingredient in a sample of baking powder using the following specifications:. (Tip: Parts i, ii v and vi below should be VERY easy...
February 24, 2015 by me

Chemistry
Toxic Carbon monoxide gas is produced when fossil fuels such as gasoline, burn wihtout sufficient oxygen gas. The CO ca eventually be converted to CO2 inthe atmsphere. Automobie cata;yctic converters are desgned to speed up this conversion: How many moles of oxygen gas would ...
March 31, 2011 by Keren

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