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October 1, 2014

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Number of results: 64,920

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

chemistry
You have a 1 L container of a gas O 2 at 20C and 1 atm. Subtracting the weight of the container, what is the mass of the gas?
April 6, 2012 by david

chemistry
You have a 1 L container of a gas O 2 at 20C and 1 atm. Subtracting the weight of the container, what is the mass of the gas?
April 9, 2012 by sam

chemistry
At 23C, Kp = 0.075 for the equilibrium: NH4HS (s) ↔ NH3 (g) + H2S (g) A sample of solid NH4HS is placed in a closed vessel and allowed to equilibrate. Calculate the equilibrium partial pressure (atm) of ammonia, assuming that some solid NH4HS remains.
September 14, 2012 by Nicole

Physics
An oxygen tank of volume V is stored in a medical laboratory. Initially, the tank is full of compressed oxygen at pressure p_{0} . Lab regulations require a refill when the pressure in the tank drops to p_{2} so as to avoid contaimination by impure gas. Suppose that the daily ...
September 23, 2013 by Anon.

chemistry
a process stream containing acetone vapour in nitrogen enters a cooler compressor at 65 degree celcius and 1 atm, with relative saturation of acetone equal to 50%. the gas is compressed and cooled to 20 degree celcius to recover 95% of acetone as a liquid. calculate the outlet...
March 17, 2011 by alicia

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 you help me?? Go down...
February 4, 2007 by VaNeSsA

science; AP Chem
Dinitrogen oxide (N2 O) gas was generated from the thermal decomposition of ammo- nium nitrate and collected over water. The wet gas occupied 124 mL at 21◦ C when the atmospheric pressure was 752 Torr. What vol- ume would the same amount of dry dinitrogen oxide have ...
September 14, 2012 by Anonymous

chem/some1 check my work plz.
nitrogen gas contained in a cylinder with a volume of 5.0x10^2 mL @ a temp of 30C and pressure of 710 torr. The gas is then compresse to a volume of 25mL and the temp. is reaised to 820C. what is the new pressure of the nitrogen gas?? Pf=p1*v1*t1/Tf*Vf P=(700torr)(5.02x10^2mL...
November 16, 2010 by julia

Chemistry
A sample of magnesium metal reacts with hydrochloric acid solution to produce magnsesium chloride solution and hydrogen gas. a)write a balanced chemical equation for this reaction and include phase designations. The phase designations would be s for solid, aq for aqueous, and ...
October 7, 2010 by Anonymous

Chemistry
A sample of magnesium metal reacts with hydrochloric acid solution to produce magnsesium chloride solution and hydrogen gas. a)write a balanced chemical equation for this reaction and include phase designations. The phase designations would be s for solid, aq for aqueous, and ...
October 7, 2010 by Anonymous

Chemistry
At a certain temperature and pressure, one liter of CO2 gas weighs 1.45 g. What is the mass of one liter of C4H10 gas at the same temperature and pressure?
October 16, 2012 by Bill

ap chem
: 1.0 L of an unknown gas was allowed to effuse through a small opening under constant pressure conditionssuppose you have two 1-liter flasks, one containing n2 at STP, the other containing CH4 at STP
February 15, 2012 by davy

chemistry
I am trying to find pressure. R=.0821 T=1273 K V=2 n=.0997 When I put .0997 in the PV=nRT equation I get 5.2 atm, and when I put in .09 I get 4.7 atm. Which answer should I put? Which is more accurate?
December 3, 2008 by Jordan

Chemistry
Convert a pressure of 23.8 in. Hg into kilopascal. Ok so I looked up kilopascal and it Said 1 Kpa = 1000 pa So I began to set it up like this 23.8 / 29.2 x1000 am I correct Chemistry - DrBob222, Thursday, October 13, 2011 at 1:48pm I don't think that will get it. I would go ...
October 13, 2011 by Monique

Chem
An aqueous solution containing 21.6 mg of Vasopressin in 100 mL solution produces Osmotic Pressure of 3.70 mmHg at 25C. Calculate the Molecular Mass of Vasopressin. Here's what I started working on, but then I got stuck. 21.6 mg = 0.0216 g v = 100 mL = 0.1 L = 3.70 mmHg = 0...
February 2, 2012 by Anonymous

chemistry
a wet gas collected over water has a volume of 900 mL at50 degrees Celsius and a pressure of 84.6 kPa. The partial pressure of water at this temperature is 12.3 kPa. What is the volume of the dry gas at 120 kPa?
April 6, 2014 by nina

Chemistry
3. A liquid hydrocarbon (Cx Hy) is found to be 16.37% H by mass. A 1.158-g vaporized sample of the hydrocarbon has a 358 mL volume at 71.0 C and 749 mmHg. what is the molecular formula for this hydrocarbon? 4. A 1.00 g Sample of C7H603 (s), us completely burned in a bomb ...
June 21, 2011 by Katrina

physics conversions
can you check my answers. 1. What is the corresponding barometric pressure values in mmHg if the barometric pressure is reported as: 29.7 inHg. = 754.38mmHg 31.8 inHg. = 807.72mmHg 26.4 inHg. = 670.56mmHg 22.1 inHg. = 561.34mmHg 34.8 inHg. = 883.92mmHg 2. What are the ...
January 28, 2008 by james

Chem
A sample of nitrogen (N2) gas has a volume of 250ml at 30 degrees C and a pressure of 745mmHg. What is the volume of the nitrogen at STP? I got 22 liters in significant figures is this right. thank you.
November 24, 2010 by Lindsay

chemistry
a sample of gas has a volume of 12liters at 0 degrees celcius and 380 torr. what will be its volume whent the pressure is changed to 760 torr at a constant temperature?
February 10, 2011 by melissa

help chem
A 0.236g sample of carbon dioxide, CO2, has a volume of 595mL and a pressure of 455mmHg . What is the temperature, in kelvins and degrees Celsius, of the gas? what is the degrees in celsius
July 18, 2013 by Anonymous

chem
Imagine that you have a 7.00L gas tank and a 4.50L 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 105atm , to what pressure should you fill the...
September 20, 2008 by hannah

Chem/math question - from Sam
For the following reaction at 600. K, the equilibrium constant, Kp, is 11.5. PCl5(g) = PCl3(g) + Cl2(g) Suppose that 2.510 g of PCl5 is placed in an evacuated 470. mL bulb, which is then heated to 600. K. (a) What would be the pressure of PCl5 if it did not dissociate? ___atm...
January 15, 2009 by Writeacher

Chem
At 850 C, the equilibrium constant Kp for the reaction: C(s)+CO2(g) >< 2CO(g) has a value of 10.7. If the total pressure in the system at equilibrium is 1.000 atm, what is the partial pressure of carbon monoxide.
April 22, 2009 by Noemi

physics
A piston-cylinder assembly with the piston resting on a set of stops, contains 0.5 Kg of He gas intially at 100kPa and 25C. The mass of the piston and the effect of the atmospheric pressure is such that a pressure of 500kPa is required to raise it. How much energy must be ...
September 29, 2008 by Nayi

AP Chemistry
A 2.50 L balloon is filled with helium gas at sea level, 1.00 atm and 32 degrees celsius. The balloon is released and it rises to an altitude of 30,000 ft. If the pressure at this altitude is 228 mm Hg and the temperature is -44 degrees celsius, what is the volume of the balloon?
November 1, 2012 by Katie

Maybe you know this one..
Heyy, I posted this before but it kinda got pushed down and ignored, and I was hoping maybe DrBob might have an idea since no one else did! okay I have this question about chemistry and its driving me nuts. It feels like I am so close but am just missing something. The ...
February 3, 2007 by Tracy

Chemistry
Using the van der Waals equation, determine the pressure of 436.0g of SO2(g) in a 7.30-L vessel at 725k.? For SO2(g), a=6.865L^2atm/mol^2 and b=0.05679L/mol. (R=0.0821Latm/(Kmol))
March 5, 2012 by Cynthia

chemistry
Using a diagram to represent a barometer, The first bubble has 4.0L of Ar @ 1.5 atm a stopcock in between. middle bubble 3.0L Xe @ 6.2atm. stopcockB next bubble 8.0L CO @ 4.4 atm. What is predicted pressure if stopcock A is opened
April 23, 2012 by tara

physical science
Increasing what variable would decrease the pressure of a contained gas?
February 13, 2008 by Austin

science
what pressure would be exerted by 35g of chlorine gas in a1.5 litre vessel at -37
April 25, 2013 by tabisa

CHEM HELP!!!
I don't get two questions out of my homework and I know the answers to them but just not how the answers were gotten. PLEASE HELP!! 1) A handbook gives the aqueous solubility of carbon monoxide at 0 C and 1 atm CO pressure to be 0.0354 mg CO per mL of solution. What would be ...
February 13, 2012 by Taylor

Chemistry
Vinyl chloride (H2C=CHCl), the starting material from which PVC polymer is made, has a Henry's-law constant of 0.091mol/(L.atm) at 25 C. What is the solubility of vinyl chloride in water (in mol/L) at 25C and a partial pressure of 0.90 atm? Thank you in advance
June 13, 2010 by Deborah

APChem
"The osmotic pressure of a saturated solution of strontium sulfate at 25C is 21 torr. What is the solubility product of this salt at 25C (Hint: calculate molarity from the colligative properties eqn of osmotic pressure and use it in the equilibrium expression" I converted torr...
March 17, 2010 by Kiki

Chemistry (Gas question)
The mean kinetic energy of the molecules in a sample of H20 gas is 12x10^-19 J, calculate the mean velocity of a molecule and the temperature of the gas. Please help need to know for exam tomorrow.
January 18, 2013 by Dt

chemistry
nitrogen and hydrogen react in the haber process to form ammonia. All substances are in the gas phase. If 0.385atm of nitrogen and 0.792 atm of hydrogen react, what is the partial pressure of ammonia(in mmHg) when this reaction goes 67 complete. The volume and temperature are ...
March 12, 2009 by michele

Chemistry
The van der Waals equation for real gases recognizes that (A) the molecular atrractions between paritcles of a gas decreases the pressure exerted by the gas (B) the non-zero volumes of gas particles effectively decrease the amount of "empty space" between them (C) gas ...
January 3, 2010 by Anonymous

CHEMISTRY
The atmosphere contains about 6.81013 moles of ozone. If this amount of ozone gas is compressed into a thin layer around the globe (the radius of Earth is 6370 km) at STP (Standard Temperature (0C) and Pressure (1.0 atm.)), how thick will the layer be in millimeter? One ...
March 5, 2010 by HELP!!!!!

Chemistry
how many grams of bromine will be present in a sample that molar mass of 70.0 g/mol and occupies a 2.00L container at 117 kPa and 35.1C
March 14, 2014 by Bernardo

Chemistry
A 0.160-g sample of unknown metal (X) reacts with hydrochloric acid to produce 66.5 mL of "wet" gas at 20 C and 754 mm Hg. What is the unknown metal (X)? (The vapor pressure of water at 20 C is 18 mm Hg. Help please?
April 23, 2014 by Ally

General Chemistry
A tank of oxygen is under a pressure of about 4.00 x 10^3 kPa. Express this pressure in millimeters of mercury.
June 20, 2012 by Kim

Chemistry II
17.5 mL of oxygen gas were collected at room temperature (22oC) and 100.2 kPa of atmospheric pressure. a) How many moles of oxygen gas were produced? b) What is the molar volume of the oxygen gas at the conditions in the laboratory?
September 14, 2009 by pasely

chemistry
A sample of gas has increased in temperature from 20 Celsius to 22 Celsius. Which of the following happens as the temperature of the gas goes up? A.The gas undergoes a phase change. B. The velocity of the gas particles decreases. C.The kinetic energy of the particles ...
July 29, 2011 by kendra

Chem Help!
I really need help with this question for my chem H.W. 1) On a summer day in Breckenridge, Colorado, the atmospheric pressure is 525 mm Hg. What is this air pressure in atmospheres? (round to the hundredths place) atm
April 10, 2008 by Lisa

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

chem 3A
please help me with these homework problems from chemistry because the teacher did not give enough information to some of these chemistry work problems. 1) 50.0 g of aluminum is reacted with excess sulfuric acid. The chemical equation for the reaction is: 2Al + 3H2SO4 --> ...
July 25, 2008 by shylo

finite math
8. Among 38-43 year old, 25% say they have written an editorial letter while under the influence of peer pressure. Suppose two 38-43 year old are selected at random. (a )what is the probability that at least one has not written under the influence of peer pressure. (b) what is...
June 17, 2014 by carol

finite math
Among 38-43 year old, 25% say they have written an editorial letter while under the influence of peer pressure. Suppose two 38-43 year old are selected at random. (a )what is the probability that at least one has not written under the influence of peer pressure. (b) what is ...
June 18, 2014 by carol

Physics
Suppose that there is a partial blockage of the aorta, which normally pumps about 5 L of blood per minute. If the diameter of the aorta were reduced by 30%, what increase in blood pressure gradient would be needed to obtain the normal flow rate? (Assume that Poiseuilles law ...
January 18, 2013 by Tim

Chemistry
A 1.50- gas sample at 735 and 25.0 contains 5.00 radon-220 by volume. Radon-220 is an alpha-emitter with a half-life of 55.6 . How many alpha particles are emitted by the gas sample in 4.00 minutes?
July 29, 2012 by Sigurd

Chemistry
A 1.50- gas sample at 722 and 25.0 contains 7.56 radon-220 by volume. Radon-220 is an alpha-emitter with a half-life of 55.6. How many alpha particles are emitted by the gas sample in 3.00 minutes?
September 21, 2012 by Diamond

Science - Physics
Some helium at 20.0psi gauge pressure occupies 40.0ft^3. find its volume at 32.4 psi if the temperature remains constant.
April 11, 2012 by Sharon

CHEMISTRY...........
1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140C, how many liters of each product would be present at the same temperature and pressure? My answer: (0.961 atm)(29.0 L) (413k) all divided by (413)(0.961 atm)=29.0 L CO2 29.0 L CO2 x 2LH2O/1LCO2=...
October 11, 2013 by Anonymous

Chemistry
According to your calculations a reaction should yield 5.67 g of oxygen O2. What do you expect the volume to be at 23 degrees C and 0.985 atm? I got the all the amounts 5.67 g 23 degrees C = 296 K .985 atm And use the ideal gas law Can you help me out by starting it again
October 23, 2007 by Lauren

Physics
Assuming that your lungs can function when under a pressure of 11 kPa, what is the deepest you could be under water and still breathe through a tube to the surface?
April 6, 2010 by Noodle

chemistry
A certain gas has a volume of 20 cu ft and a pressure of 10psia at -40 degrees F. What is the new pressure if the gas is compressed to 5 cu ft at -40 degrees C.. a. 0.025 psia b. 0.4 psia c. 10 psia d. 40 psia.
May 18, 2010 by Christine

chemistry
A sample of hydrogen gas was collected over water at 36C and 855 mmHg. The volume of the container was 6.50 L. Calculate the number of moles of H2 collected. (Vapor pressure of water is 44.6 torr at 36C)
August 15, 2009 by jeff

chemistry
1.If a container that is 1L has 1 mol of solid NACL , if you add more nacl will the concentration of solid increase? it should? because if you increase it to two mols it will become 2 mol/l right? so in a equillibrium system like nacl(s)--><---na+ + cl- if you increase ...
July 21, 2009 by kevin

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 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

Chem
A gas mixture in a 3.100 L container at 415C contains 1.30 g each of Ar, CO, and CH4. Find the partial pressure of Ar (in atmospheres). Find the total pressure of the gas mixture (in atmospheres). Find the mole fraction of CO. Do I use PV=nRT for partial pressure and if I do ...
November 1, 2012 by Anoynmous

Chemistry
If the temperature of a confined gas is doubled at constant pressure, what change is observed? A) The volume of the gas is decreased to 1/4 of its original value. B) The volume of the gas is increased to twice its original value. C) The density of the gas is doubled. D) The ...
March 29, 2010 by Allison

A.P Chemistry
A different rigid 5.00L cylinder contains 0.176mol of NO(g) at 298 k. A 0.176mol sample of 02(g) is added to the cylinder, where a reaction occurs to produce NO2(g) (d) write the balanced equation for the reaction. (e) calculate the total pressure, in atm, in the cylinder at ...
October 23, 2006 by Brianna

Another A.P Question
A different rigid 5.00L cylinder contains 0.176mol of NO(g) at 298 k. A 0.176mol sample of 02(g) is added to the cylinder, where a reaction occurs to produce NO2(g) (d) write the balanced equation for the reaction. (e) calculate the total pressure, in atm, in the cylinder at ...
October 24, 2006 by Brianna

thermo
four hundred cubic centimeters of a gas at 740mm Hg absolute and 18 degree celcius a process until the pressure until the pressure becomes 760mm Hg absolute and the temperature o degree celcius. what is the final volume of the gas
October 3, 2012 by 111111

physics
what pressure would you expect if the gas in the flask were heated to 150 degrees celsius?
January 19, 2012 by corrie

chemistry
state and explain how the concentration of nitrogen gas would be affected by an increase in pressure
March 13, 2012 by faith

chemistry
state and explain how the concentration of nitrogen gas would be affected by an increase in pressure
March 13, 2012 by faith

chemistry
At 25 C, the equilibrium partial pressures for the following reaction were found to be PA = 6.30 atm, PB = 7.20 atm, PC = 6.40 atm, and PD = 9.10 atm. 2A(g) + 2B(g)-->C(g) + 3D(g) What is the standard change in Gibbs free energy of this reaction at 25 C.
February 17, 2012 by Katie

Chemistry
A sample of hydrogen gas (H2) was found to effuse at a rate equal to 6.7 times that of an unknown gas. The molecular weight of the unknown gas is __________ g/mol. Express your answer to one (tenth) decimal place.
April 22, 2010 by Camarra

chemistry
If a scuba diver's lungs have a normal capacity of 4.9 L at sea level (1.0 atm), what would be the volume of her lungs if the pressure at a depth of 50 ft is 975 mmHg?
April 9, 2014 by Leeya

chemistry
A gas has a density of 5.56 g/L. a. What volume in milliliters would 4.17 g of this gas occupy? b. What would be the mass in kilograms of 1 m3 of this gas?
September 11, 2013 by elizabeth

chemistry
A gas has a density of 5.56 g/L. a. What volume in milliliters would 4.17 g of this gas occupy? b. What would be the mass in kilograms of 1 m3 of this gas?
September 11, 2013 by elizabeth

chemistry
A gas has a density of 5.56 g/L. a. What volume in milliliters would 4.17 g of this gas occupy? b. What would be the mass in kilograms of 1 m3 of this gas?
September 11, 2013 by elizabeth

chemistry
some oxygen occupies 500.0 ml when its temperature is 40.0 C . if you wished to decrease the volume by 100.0 ml, to what temperture celsius would you need to lower the gas? not sure how to set this up right..keep thinking i need to subtract 100.0 from 500.0 first,then set it ...
February 2, 2011 by Harley

Chemistry..Please Help
HENRY'S LAW I did the first one im not sure how to do the 2 and the 3rd question. 1. What is the Henry's law constant for CO2 at 20{C}? C=kP K=c/p = 3.70*10^-2/1.00atm= 0.037 2. What pressure is required to achieve a CO2 concentration of 6.0010−2 at 20{C}? Given: C (mol...
May 29, 2009 by Saira

chem - Urgent, please help
0.702g arsenic combines with 0.225g of oxygen to make an oxide of arsenic. When heated this produces a gas with a volume of 52cm3. How do i work out the molecular formula of the oxide when its in a gaseous state? The weight ratio will tell you, after dividing by atomic weights...
February 28, 2007 by laura

chemistry
A reaction produced 55.7 mL of nitrogen gas, which was collected over water at 23oC. The measured barometric pressure was 742 torr. If the vapor pressure of water at 23oC is 21 torr, what was the mole fraction of N2 in the collected gas?
November 7, 2011 by Sarah

Chemistry: Partial Pressure
A mixture of 0.166 moles of C is reacted with 0.117 moles of O2 in a sealed, 10 L vessel at 500 K, producing a mixture of CO and CO2. The total pressure is 0.640 atm. What is the partial pressure of CO? Please provide a step by step explanation with the answer so I can ...
October 18, 2012 by M

AP Chemistry
A mixture of aluminum and zinc metal is used in 2 experiments described below: A- A 1.7 gram sample of the mixture is reacted with excess hydrochloric acid and the resulting hydrogen gas is collected over water. The reaction takes place at 750 mm Hg atmospheric pressure and ...
April 3, 2011 by Kate

chemistry
At 300.K and 1.00 atm, assume that 25 mL of NO gas reacts with 22 mL of oxygen gas and excess water to produce nitric acid according to the following equation: O (g) H O(l) 2 HNO (g) 2 2NO(g) 3 + 2 + 2 ⎯⎯→ 3 . If all of the nitric acid produced by this ...
March 21, 2010 by bob

physic
A diesel engine works at a high compression ratio to compress air until it reaches a temperature high enough to ignite the diesel fuel. Suppose the compression ratio (ratio of volumes) of a specific diesel engine is 24 to 1. If air enters a cylinder at 1 atm and is compressed ...
April 17, 2011 by help me please Urgetnt

physics
A diesel engine works at a high compression ratio to compress air until it reaches a temperature high enough to ignite the diesel fuel. Suppose the compression ratio (ratio of volumes) of a specific diesel engine is 19 to 1. If air enters a cylinder at 1 atm and is compressed ...
January 1, 2012 by maria

physics
A diesel engine works at a high compression ratio to compress air until it reaches a temperature high enough to ignite the diesel fuel. Suppose the compression ratio (ratio of volumes) of a specific diesel engine is 19 to 1. If air enters a cylinder at 1 atm and is compressed ...
January 3, 2012 by maria

physics
A diesel engine works at a high compression ratio to compress air until it reaches a temperature high enough to ignite the diesel fuel. Suppose the compression ratio (ratio of volumes) of a specific diesel engine is 19 to 1. If air enters a cylinder at 1 atm and is compressed ...
January 4, 2012 by maria

physics
pressure cookers have been around for more than 30 years, although their use has stongly declined in recent years.how much force must the latches holding the lid onto pressure cooker be able to withstand if the circular lid is 25 cm in diameter and the gauge pressure inside is...
April 2, 2014 by Mohanad

PHYSICS!!!
A hypodermic syringe contains a medicine with the density of water (figure below). The barrel of the syringe has a cross-sectional area of 2.89 10-5 m2. In the absence of a force on the plunger, the pressure everywhere is 1.00 atm. A force of magnitude 2.13 N is exerted on the...
November 11, 2012 by k

Physical science
I need help on how to set up a formula for 27c and 750 mm hg,a sample of hydrogen occupies 5.00 l how much space will it occupy at stp
October 2, 2012 by Glenda

chem
The solubility of nitrogen in water is 8.21 E-4 mol/L at 0C when the nitrogen pressure above water is 0.790 atm. Calculate the solubility of nitrogen in water when the partial pressure of nitrogen above water is 9.55 atm at 0C?
May 8, 2013 by madd

Chemistry
A sample of oxygen gas is collected by displacing water from an inverted bottle as shown in the diagram below. The volume of O2(g) collected is 400.0ml at 25 degree Celsius. The atmospheric pressure is 680 torr and the vapor pressure of water at 25 degree Celsius is 23.8 torr...
February 3, 2011 by K

chemistry
Hello, a few questions: Thanks so much! 1. The heat capacities of titanium and water are 0.522 J g-1 K-1 and 4.184 J g-1 K-1, respectively. What is the final temperature of the titanium-water mixture if a 175.0-g sample of titanium, initially at 90.0oC, is added to 50.0 g of ...
March 1, 2014 by abby

Physics
A cylinder with a valve at the bottom is filled with an ideal gas. The valve is now opened and some of the gas escapes slowly. The valve is then closed, after which the piston is observed to be at a lower position. Assume that the system is in thermal equilibrium with the ...
November 21, 2010 by Thomas Samuel Adams

chemistry
what is the molar mass of the unknown gas that diffuses 0.250 times as fast as hydrogen gas under the same circumstances?
August 9, 2011 by Aamna Qamar

physical science
if the absolute pressure of gas is 550.280kPa , its gage pressure is ?
February 8, 2009 by kathy

qnt/351
Which of the following statements about the two sample sizes is NOT true? Assume thepopulation standard deviations are equal A. Sample A = 11; sample B = 13 B. Sample A = 12; sample B = 14 C. Sample A = 13; sample B = 13 D. Sample A = 10; sample B = 16
March 31, 2014 by arelis

Chemistry
what happen to the pressure of a gas inside a container if the temperature of the gas decreases?
April 13, 2010 by Lyly Nguyen

Chemistry
How many liters of ammonia gas can be formed from 11.3 L of hydrogen gas at 93.0 C and a pressure of 42.4 kPa?
March 22, 2013 by Venus

Science
you have 25 L cylinder of helium at a pressure of 135 atm and a temperature of 23 degrees celcius. the He is used to fill balloons toa volume of 1 L at .982 atm and 27 degrees celcius. how many balloons can be silled with He?
February 10, 2011 by Uru

calculus
At a temperature of 20C, the volume V (in liters) of 1.33 g of O2 is related to its pressure p (in atmospheres) by the formula V(p) = 1/p (a) What is the average rate of change of V with respect to p as p increases from p = 7 to p = 8? L/atm (b) What is the rate of change to ...
February 4, 2011 by Anonymous

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