Sunday

February 1, 2015

February 1, 2015

Number of results: 43,799

**Chemistry**

Describe what happens to a co2 sample when the following changes are made: (a) The temperature is increased from -100°c to 0°c at constant pressure of 2 atm B) The pressure is reduced from 72 atm to 5.0 atm at a constant temperature of 30°c C) The pressure is first increased ...
*November 9, 2014 by Shemiza*

**chemistry**

a 0.25 mol sample af neon gas at 18 C and 0.700 atm is heated to 40 C. the new gas pressure is 1.11 atm. what is the change in volumn of the neon gas?
*February 4, 2013 by james*

**Chemistry**

A rigid cylinder contains a sample of gas at STP. What is the pressure of this gas after the sample is heated to 410 K? a. 1.0 atm b. 0.50 atm c. 0.67 atm d. 1.5 atm Explain how you get the answer.
*December 12, 2010 by danny123*

**Chemistry**

When a sample of potassium nitrate is heated, oxygen gas is produced. This gas, collected in a 750 milliliter flask, has a pressure of 2.8 atmosphere and the temperature is recorded to be 53.6°C. How many moles of oxygen gas are produced in this reaction? (R = 0.08205 L atm/K ...
*April 16, 2014 by Brina*

**physics**

ideal gas is kept under constant pressure of 1 atm. If initial temperature is 301K and the volume increases by 10% what is the final temperature of the gas? T2=? V1/V2= T1/T2 V1/V2= (301K)/T2 .10/1= (301K)/T2 Is the side with volume correct? The 10% part confuses me. Thanks ...
*December 3, 2007 by Tammy*

**physics**

An ideal gas is kept under constant pressure of 1 atm. If initial temperature is 301K and the volume increases by 10% what is the final temperature of the gas? T2=? V1/V2= T1/T2 V1/V2= (301K)/T2 .10/1= (301K)/T2 Is the side with volume correct? The 10% part confuses me. Thanks...
*December 3, 2007 by Tammy*

**physics**

An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion...
*April 21, 2011 by niki*

**physics**

An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion...
*April 21, 2011 by niki*

**physics**

An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion...
*April 22, 2011 by niki*

**chemistry**

At 16°C a sample of ammonia gas exerts a pressure of 11.7 atm. What is the pressure when the volume of the gas is reduced to one-fourth of the original value at the same temperature so the inital Temp=16 C initial Pressure. 11.7 final pressure-unknown temperature-same what next?
*October 17, 2010 by april*

**Chemistry**

A sample of gas collected over water at 42 C occupies a volume of one liter. The wet gas has a pressure of 0.986 atm. The gas is dried, and the dry gas occupies 1.04 L with a pressure of 1.00 atm at 90 C. Using this information, calculate the vapor pressure of water at 42 C. ...
*October 14, 2010 by Bree*

**College Chemistry**

Calculate temperature when 0.50L sample or gas at 1.0 atm and 25degrees C is compressed to 0.05L of gas at 5.0 atm.
*July 25, 2009 by Gayla*

**Chemistry**

A sample of helium gas initially at 37.0 degrees C, 785 torr and 2.00 L was heated to 58.0 degrees C while the volume expanded to 3.24 L. What is the final pressure in atm? a)1.79 b)3.21 c)0.681 d).517 e)none of the above please explain--I need to know how to do this--this is ...
*January 3, 2010 by Coug*

**Chemistry**

A sample of gas with a volume of 14.9 liters at 2.6 atmospheres pressure and a temperature of 25°C is allowed to expand to a volume of 29.3 liters at a temperature of 15°C. What is the final pressure (atm)atof the gas?
*March 25, 2013 by Linzy*

**chemistry**

The equilibrium constant (Kc) for the gas phase reaction 2 NH3 N2 + 3 H2 is 3.0 x 10-3 at some temperature. The reaction is started by placing a 0.040-mol sample of ammonia in an empty one-liter flask. When equilibrium is established how much N2 is present? 1. ) 0.019 mol 2...
*October 25, 2009 by James*

**Chemistry**

consider 2 sample of nitrogen gas. sample 1 contains 1.5 mol of N2 and has a volume of 36.7L at 25C and 1 atm. sample 2 has a volume of 16.5L at 25C and 1 atm. calculate the number of moles of N2 in sample 2 do i use the pv= nrt equation? and do i only use the information ...
*June 8, 2010 by Anonymous*

**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*

**physics**

We start with 5.00 moles of an ideal monatomic gas with an initial temperature of 123C. The gas expands and, in the process, absorbs an amount of heat equal to 1300J and does an amount of work equal to 2040J. What is the final temperature of the gas? Use R= 8.3145J/(mol*K) for...
*October 4, 2009 by Annie*

**Chemistry**

A gas occupying a volume of 664 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
*May 7, 2013 by Logan*

**Chemistry**

A gas occupying a volume of 664 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
*May 7, 2013 by Logan*

**Chemistry**

Consider the process where 1.3 moles of ice, initially at -30.0 C, is heated to 140.0 C at constant pressure of 1.00 atm. The molar heat capacities (Cp) for solid, liquid, and gaseous water (37.5 J K-1 mol-1, 75.3 J K-1 mol-1, 36.4 J K-1 mol-1, respectively) are assumed to be ...
*January 30, 2014 by Bryan Josten*

**Chemistry**

Consider the process where 1.3 moles of ice, initially at -30.0 C, is heated to 140.0 C at constant pressure of 1.00 atm. The molar heat capacities (Cp) for solid, liquid, and gaseous water (37.5 J K-1 mol-1, 75.3 J K-1 mol-1, 36.4 J K-1 mol-1, respectively) are assumed to be ...
*January 31, 2014 by Bryan Josten*

**chemistry-check answer**

I was wondering if someone can tell me if I did this right: The gas constant (R) has many different unit formulations. Convert the value of 8.314 (m3-Pa)/(K-mol) into units of (L-mmHg)/(K-mol). This is what I did: (8.314 m3-Pa/K-mol)*(1 atm/101325 Pa)*(760 mm Hg/1 atm)
*October 9, 2010 by Jazmin*

**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 gas is cooled at ...
*October 8, 2012 by hanna*

**Chemistry**

A sample of argon gas has a volume of 715 mL at a pressure of 1.34 atm and a temperature of 144 Celsius. What is the volume of the gas in milliliters when the pressure and temperature of the gas sample are changed to 622 mmHg and 321 K?
*May 15, 2010 by Kelly*

**chemistry**

A 24L sample of a gas at fixed mass and constant temperature exerts a pressure of 3.0 atm. What pressure will the gas exert if the volume is changed to 16L?
*March 16, 2010 by catherine*

**chemistry**

a sample of helium gas has a volume of 6.50L at a pressure of 845mm Hg and a temperature of 25 celcius.what is the pressure of the gas in atm when the volume and temperature of the gas sample are changed to the following: a. 1850 mL and 325K
*June 27, 2010 by Jetta*

**Physics **

Assume that 0.10 mol of argon gas is admitted to an evacuated 50 cm3 container at 20° C. The gas then undergoes isobaric heating to a temperature of 300° C. What is the final pressure of the gas? What is the final volume?
*August 4, 2012 by VW*

**physics **

2 moles of an ideal gas at 20k changes from a pressure of 15 atm to 3 atm at constant temperature. Calculate the work done by the gas.
*March 21, 2012 by frank fred*

**Gem=neral Chemistry 106**

A gas occupying a volume of 806 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
*February 28, 2011 by Reese*

**Physics**

A 35.41-g sample of Cu(s) at 96.73°C was added to a constant-pressure calorimeter containing 148.3 g of H2O(l) at 25.20°C. The final temperature of the system was 26.66°C. Assuming no heat loss to the surroundings, what is the calorimeter constant? C(Cu) = 24.435 J/mol.K; C(...
*September 25, 2012 by cry baby*

**Chemistry**

A sample of a gas at STP has its temperature raised to 510C and its pressure raised to 5 atm. If the initial volume of this gas is 100.0 ml, what will the final volume be?
*May 13, 2012 by Linda*

**Chemistry**

A sample of argon has a pressure of 1.021 atm at a temperature of 89.4 degC. Assuming that the volume is constant, at what temperature will the gas have a pressure of 1016.56 mmHg
*February 9, 2014 by Anonymous*

**Chemistry**

A sample of argon has a pressure of 1.021 atm at a temperature of 89.4 degC. Assuming that the volume is constant, at what temperature will the gas have a pressure of 1016.56 mmHg
*February 9, 2014 by Anonymous*

**AP Chemistry**

A 34.05 gram liquid sample of an unstable compound is deposited in a metal piston assembly that has a cylinder with a diameter of 20.0 cm. After the sample is added, the piston is placed in contact with the liquid and the piston vent is closed. This process removes all ...
*September 26, 2012 by Jack*

**chemistry**

3 moles of an ideal gas initially at a pressure of 1 atm and a temprature of 100°C are expanded to twice the initial volume and then heated to 200°C at the new volume.What is the final pressure in atm?
*May 2, 2014 by md shahnawaz*

**Chemistry**

Consider an ideal gas encloesd in a 1.00 L container at an internal pressure of 10.0 atm. Calculate the work, w, if the gas expands against a constant external pressure of 1.00 atm to a final volume of 20.0 L. w = ____ J now calculate the work done if this process is carried ...
*February 10, 2012 by Lauren*

**Chemistry**

A sample of gas occupies a volume of 63.1 mL. As it expands, it does 130.4 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas? I know that P= 1.03 ATM when converted. I think I'm supposed to use the equation w= -PdeltaV and ...
*January 31, 2013 by Anonymous*

**chemistry**

the pressure of 3moles of an ideal gas in a container is reduced from 1.0 atm to 0.50 atm against a constant pressure of 0.50 atm at a constant temperature of 273K..what is the change of heat (in J) for the process??Assume that internal energy change at constant tempreature is...
*December 7, 2012 by Emin*

**chemistry**

A sample of only solid ammonium chloride was heated in a 1 L container at 500 C. At equilibrium, the pressure of NH3 (g) was found to be 1.75 atm. what is the equilibrium constant, Kc, for the decomposition at this temperature? R= .08206 L atm/K Mol NH4CL (s) <---> NH3(g...
*November 13, 2010 by Audrey*

**chemistry**

17 liters of a gas is at an initial temperature of 67 degrees C and a pressure of 88.89 atm, what will be the pressure of the gas if the tempetature of the gas is raised to 94 degrees C and the volume of the gas is decreased to 12 liters? 177 atm 36.3 atm 108 atm 136 atm 219 atm
*December 5, 2011 by Anonymous*

**Thermochemistry**

Path A A sample of gas in a cylinder of volume 3.96 L at 327 K and 3.28 atm expands to 7.34 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 Path B has two steps. In the first step, the gas ...
*October 5, 2010 by Nick*

**chemistry**

a sample of oxygen gas has a volume of 7.64 L at a temperature of 19C and a pressure of 1.38 atm. Calculate the moles of O2 present in this gas sample
*May 8, 2013 by barbra*

**chemistry**

A 10.0-L stainless steel container was charged with 2.00 atm of hydrogen gas and 3.00 atm of oxygen gas. A spark ignited the mixture, producing water. What is the pressure in the tank at a constant temperature of 25°C?
*November 6, 2010 by Anonymous*

**chemistry 116**

You have a rigid sealed container held at a constant temperature. You add 3.3 atm of oxygen gas, 1.7 atm of nitrogen and 4.2 atm of methane to it. What is the partial pressure of the oxygen gas in the container
*January 24, 2015 by ALEX GOLD *

**chemistry**

sample of argon gas collected at a pressure of 1.11 atm and a temperature of 28.0 oC is found to occupy a volume of 20.3 liters. How many moles of Ar gas are in the sample?
*November 5, 2011 by jen*

**physical science**

If a quantity of gas in a piston cylinder has a volume of 0.9 m3 and is initially at room temperature (30°C) and is heated in an isobaric (constant-pressure) process, what will be the temperature of the gas in degrees Celsius when it has expanded to a volume of 1.2 m3?
*May 2, 2011 by Eric*

**chemistry 106**

Calculate the work done if a gas is compressed from 8.3 L to 3.3 L at constant temperature by a constant pressure of 3.0 atm, and give your answer in units of joules. (1 L · atm = 101.3 J)
*March 3, 2010 by Tanisha *

**Chemistry**

Suppose that 2.3 L of gas at 35°C and 1.0 atm is expanded to 4.5 L at 42°C. What will the final pressure of the gas be? (Ti in Kelvins=308.15; Tf(K)=315.15) Can someone please show me how to plug the values into the Combined Gas Law formula to calculate for Pf? Please don't ...
*March 23, 2013 by Pam*

**HELP **

Calculate the change in energy when 665.0 g of CH3OH(g) completely reacts at a constant temperature of 300 K and constant pressure of 0.95 atm. R = 8.314 J/mol*K and R = 0.08206 atm*L/mol*K So i used the formula change in energy = change in H - nRT 90.7-51.9-38.8 its wrong i ...
*January 27, 2011 by Chemistry*

**Chem**

Can someone check these homework answers please? 32. The barometric pressure measured outside an airplane at 9 km was 259 mmHg. Calculate the pressure in kPa. 34.5 kPa 36. A diving bell is a container open at the bottom. As the bell descends, the water level inside changes so ...
*November 11, 2008 by Anna*

**REETA**

A 2.10 mol sample of oxygen gas is confined to a 5.10 L vessel at a pressure of 7.99 atm. Find the average translational kinetic energy of an oxygen molecule under these conditions in (j/mol) When i was working this out i tried using pv=nrt to find the temperature which i got ...
*October 21, 2008 by CHEMISTRY*

**physics**

A 2.10 mol sample of oxygen gas is confined to a 5.10 L vessel at a pressure of 7.99 atm. Find the average translational kinetic energy of an oxygen molecule under these conditions in (j/mol) When i was working this out i tried using pv=nrt to find the temperature which i got ...
*October 21, 2008 by reeta*

**Gas Law problems ( Chemistry)**

the initial temperature of a 1l sample of gas is 20c. The pressure is decreased from 720mmhg to 36mmhg and the volume increases to 2.14l. What was the final temperature of the gas?
*March 17, 2013 by Allyson*

**Physics**

A rigid tank contains 1.80 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 27.9 atm to 4.80 atm. Assume the volume of the tank and the temperature of the gas remain constant during this ...
*November 5, 2010 by idwsh*

**physics**

A rigid tank contains 1.80 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 21.6 atm to 5.80 atm. Assume the volume of the tank and the temperature of the gas remain constant during this ...
*December 13, 2014 by Meagan*

**physics**

Find the work for an isothermal expansion of 3.08 mol of an ideal gas at temperature of 18oC from pi = 4.55 atm to pf = 3.32 atm.
*November 18, 2010 by serena*

**Physics**

A rigid tank contains 1.20 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 28.5 atm to 5.30 atm. Assume the volume of the tank and the temperature of the gas remain constant during this ...
*November 5, 2010 by Stacy*

**Chem**

A flexible container at an initial volume of 5.12 L contains 7.51 mol of gas. More gas is then added to the container until it reaches a final volume of 18.3 L. Assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the ...
*December 10, 2014 by wendy*

**chemistry**

A certain amount of chlorine gas was placed inside a cylinder with a movable piston at one end. The initial volume was 3.00 L and the initial pressure of chlorine was 1.15 atm . The piston was pushed down to change the volume to 1.00 L. Calculate the final pressure of the gas ...
*October 9, 2008 by Anonymous*

**Chemistry**

Assuming that temperature remains constant, calculate the final volume Pressure of a sample of 45 L of gas is increased and the gas goes from 100 kPa to 125 kPa;
*April 6, 2011 by Jill*

**Physics**

A 1.45 mol sample of an ideal gas (γ = 1.40) is carried through the Carnot cycle described in the figure below. At point A, the pressure is 28.5 atm and the temperature is 600 K. At point C, the pressure is 1.00 atm and the temperature is 400 K. How do I get the pressure ...
*June 6, 2011 by Alex*

** physical science**

imagine that you added helium gas to a partially inflated mylar ballon, and expanded as the gas was added. During this expansion process, do you think the pressure of the helium gas inside the ballon increased , decreased or remained fairly constant? Assume the temperature of ...
*October 16, 2007 by ashlee*

**Chemistry;HELP**

1. A sample of gas under a pressure of 622 kPa has a volume of 233 cm3. The pressure is increased to 988 kPa, while the temperature remains constant. What volume will the gas occupy at this pressure? 2. The pressure exerted by a gas is 2.0 atm while it has a volume of 350 cm3...
*August 21, 2013 by Unknown*

**CHEMISTRY!! D:**

1. A sample of gas under a pressure of 622 kPa has a volume of 233 cm3. The pressure is increased to 988 kPa, while the temperature remains constant. What volume will the gas occupy at this pressure? 2. The pressure exerted by a gas is 2.0 atm while it has a volume of 350 cm3...
*September 3, 2013 by Unknown*

**chemistry**

A sample of oxygen at room temperature occupies a volume of 500. L at 1.75 atm. What would be the volume of this gas at 2.50 atm at the same temperature?
*April 9, 2014 by Leeya*

**chemistry**

The pressure in a constant-volume gas thermometer is 0.700 atm at 100°C and 0.512 atm at 0°C. (a) What is the temperature when the pressure is 0.0500 atm? °C (b) What is the pressure at 405°C? atm
*April 29, 2013 by Anonymous*

**Chemistry 105**

A sample of gas has an initial volume of 33.0 L at a pressure of 1.1 atm. If the sample is compressed to a volume of 10.0 L, what will its pressure be? (Assume constant temperature.)
*October 23, 2011 by JULIE*

**Chemistry**

Given a sample of gas (2.49 g) with a volume of 752 mL at 335K and 1.98 atm, what is the gas, SO2 or NO2? PV=nRT (1.98atm)(0.752L)= X (0.08206L-atm/mol-K)(335K) X = 0.0541634989 mol= g/gfm 2.49/X= 0.0541634989 X = 45.97 NO2 has 46g, whereas SO2 is 64.1g. Therefore, would the ...
*December 23, 2009 by Anonymous*

**chemistry **

Determine the density of methane (CH4) in g/L at 24.7oC and 1.1 atm ideal gas eqn: P = (rho)RT, where: pressure: P = 1.1 atm specific gas constant: R, R = |R / M, where |R = 0.0821 L-atm / K-mol and, molecular weightCH4: M = 0.016 kg/mol R = 0.0821/0.016 = 5.13 and temp. T = ...
*October 16, 2010 by kellie*

**Chemistry**

Consider the cracking of gaseous ammonia at constant total pressure of 1 atm and constant temperature. Find the equilibrium gas composition at 400 degree C. Given: The Gibbs free energy for the cracking reaction 2NH3 = N2 + 3H2, DeltaGo ( delta G standard) =87,030-25.8TlnT –31...
*March 29, 2012 by John*

**chemistry help**

An amount of 414.27 g of zinc sulfide (ZnS, MM=97.44 g/mol) reacts with 99.58 g of oxygen gas (O2, MM=31.999 g/mol) at a constant temperature of 298.0 K and constant pressure of 1.00 atm. The reaction: 2 ZnS(s) + 3 O2(g) --> 2 ZnO(s) + 2 SO2(g) dH = -818.58 kJ a) How much ...
*October 21, 2012 by Tymee*

**chemistry help**

An amount of 414.27 g of zinc sulfide (ZnS, MM=97.44 g/mol) reacts with 99.58 g of oxygen gas (O2, MM=31.999 g/mol) at a constant temperature of 298.0 K and constant pressure of 1.00 atm. The reaction: 2 ZnS(s) + 3 O2(g) --> 2 ZnO(s) + 2 SO2(g) dH = -818.58 kJ a) How much ...
*October 21, 2012 by Tymee*

**physics**

Question Part Points Submissions Used 1 –/1 0/2 Total –/1 A rigid tank contains 1.40 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 21.6 atm to 5.90 atm. Assume the volume of the tank and ...
*November 23, 2011 by Sarah*

**Chemistry**

A sample of gas occupies a volume of 500.0mL at .906 atm and 97 C. What will the final temperature (in Celsius) be if it is brought to a volume of 1.05L and a pressure of 502 mm Hg?
*July 11, 2011 by Haley*

**physics**

1.7 mol of an ideal gas which starts at 1.6 atm and 50 o C does 2.0 kJ of work during an adiabatic expansion. What is the final volume of the gas?
*November 18, 2010 by serena*

**CHEMISTRY**

NEED HELP (Combined gas Law) A gas at a pressure of 1.50 atm has a volume of 200 mL. Calculate the new volume if the pressue changes to 1.20 atm. Assume constant temperature.
*March 19, 2013 by JOY*

**chemistry-recheck answer**

I was wondering if someone can tell me if I did this right: The gas constant (R) has many different unit formulations. Convert the value of 8.314 (m3-Pa)/(K-mol) into units of (L-mmHg)/(K-mol). This is what I did: (8.314 m3-Pa/K-mol)*(1 atm/101325 Pa)*(760 mm Hg/1 atm)*(1L/...
*October 9, 2010 by Jazmin*

**Chemistry**

A 5.0 L sample of gas at 1.0 atm and 25 degrees Celsius is compressed to 0.05 L and 5.0 atm. What is the temperature at this new set of conditions?
*March 27, 2012 by Deana*

**chemistry**

A container holds 1.00 mol O2, and the pressure in the container is 2.00 atm. A student adds 60.0 g of gas Y to the container. The total pressure (of O2 and gas Y) is 3.00 atm. What is the molar mass of gas Y? (V and T constant)
*March 21, 2011 by Kamila*

**Chem**

I don't believe I'm getting the correct answers for this problem. Could someone look over my work and verify whether it is correct or not? One mole of an ideal gas (Cv = 3/2R) at 300. K expands adiabatically against a constant external pressure of 2.00 atm from a volume of 1....
*March 6, 2007 by Chris*

**chem/plz/check work studying for a final**

what is the volume occupied by 16.0g ethane gas (C2H6) at 720 Torr and 18C? V=nRT/P conversion of mol: 16.0g C2H6 X 1mol C2H6/30.07g C2H6= .53mol C2H6 V= .53 mol(0.0821 L*atm/mol*K)(291)K / 720 Torr (1 atm/760Torr) V= 13.5 L
*December 16, 2010 by julia*

**chem/plz/check work studying for a final**

what is the volume occupied by 16.0g ethane gas (C2H6) at 720 Torr and 18C? V=nRT/P conversion of mol: 16.0g C2H6 X 1mol C2H6/30.07g C2H6= .53mol C2H6 V= .53 mol(0.0821 L*atm/mol*K)(291)K / 720 Torr (1 atm/760Torr) V= 13.5 L
*December 16, 2010 by julia*

**chemistry**

Question: how to solve for 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? Could someone give me the setup for this? I know I have to ...
*November 22, 2011 by sandy*

**Chemistry**

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

**science**

An 0.804 mol sample of hydrogen gas at a temperature of 16.0 oC is found to occupy a volume of 29.2 liters. The pressure of this gas sample is mm Hg.
*September 1, 2013 by Anonymous*

**science**

An 0.804 mol sample of hydrogen gas at a temperature of 16.0 oC is found to occupy a volume of 29.2 liters. The pressure of this gas sample is mm Hg.
*September 1, 2013 by Anonymous*

**chemistry**

An 0.727 mol sample of argon gas at a temperature of 22.0 °C is found to occupy a volume of 26.2 liters. The pressure of this gas sample is how many mm Hg?
*May 5, 2014 by Sarah*

**chem **

The volume of a 3.60L sample of gas at 27degrees Celsius is reduced at constant pressure of 3.00L. What is the final temperature?
*October 14, 2014 by gina*

**Physics**

A cylinder with a moveable piston holds 2.60 mol of argon at a constant temperature of 295 K. As the gas is compressed isothermally, its pressure increases from 101 kPa to 149 kPa. (a) Find the final volume of the gas. Answer in m3 (b) Find the work done by the gas. Answer in ...
*April 15, 2011 by steve*

**chemistry**

A sample of helium gas has a volume of 328 mL at 0.69 atm. What pressure is needed to reduce the volume at constant temperature to 32 mL?
*February 23, 2014 by john*

**Chemistry 101**

Are these correct? 1. A sample of gases contains three gases at the following pressures: 1.2 atm N2, 3.2 atm O2, and 0.56 atm Xe. What is the total pressure in the container? a. 5.0atm b. 1.4atm c. 2.2atm d. 1.0atm e. 1.7atm I am pretty sure it is A. Is that correct? 2. The ...
*November 24, 2009 by Madison*

**Physics hard... can't get it right**

A cylinder of compressed Oxygen is carried on a spacecraft headed for Mars. The compressed gas cylinder has a volume of 10,000 L and is filled to a pressure of 200 atm at 273 K. The maximum pressure the cylinder can hold is 1000 atm. The molar mass of Oxygen is 32 g/mol. ...
*May 6, 2010 by richard*

**chemistry**

A 9.96 mol sample of methane gas is maintained in a 0.836 L container at 296 K. What is the pressure in atm calculated using the van der Waals' equation for CH4 gas under these conditions? For CH4, a = 2.25 L2atm/mol2 and b = 4.28E-2 L/mol.
*January 29, 2012 by jim*

**General Chemistry I**

A sample of gas occupies a volume of 59.9 mL. As it expands, it does 126.2 J of work on its surroundings at a constant pressure of 798 torr. What is the final volume of the gas? a. 61.1 mL b. 1,250 mL c. 218 mL d. 1,490 mL e. None of the above I used the work function w = -P&#...
*December 3, 2012 by Emily*

**chemistry URGENT!**

Many analytical instruments require liquid nitrogen. While filling an instrument with liquid nitrogen, an analytical chemist slips and spills the contents of the dewer, 25L, onto the floor. Since the boiling point of liquid nitrogen at 1atm is 77.4 K, all the nitrogen boils ...
*October 24, 2010 by mia*

**physics**

a metal tank with a volume of 3.10 L will burst if the absolute pressure of the gas exceeds 100 atm. If 11 mol of an ideal gas is put into the tank at a temperature of 23.0 C, to what temperature can the gas be warmed before the tank ruptures? Neglect the thermal expansion of ...
*November 19, 2009 by sarah*

**Physics**

0.75 mol of argon gas is admitted to an evacuated 40 cm^{3} container at 40 C. The gas then undergoes an isochoric heating to a temperature of 500 C. Before I forgot to write the question...so the question is What is the final pressure of the gas? * physics - drwls, Friday, ...
*December 12, 2009 by Ana*

**Chemistry**

0.000014 mol of argon gas is placed in a 600 mL light bulb. What's the pressure of the gas in the bulb at 23C? PV=nRT (0.6L) X = (0.000014 mol) (0.08206 L-atm/mol-K)(296.15 K) X= 5.7 *10^-4 atm ?
*December 23, 2009 by Anonymous*

**Chemistry/Calorimetry**

You buy coffee (200.0 ml) served in a styrofoam cup. You are up late working in a chemistry lab, and want to drink the coffee right away, but at 95.0 degrees C, it is too hot to drink. You like the temperature of your coffee to be 79.0 ± 1.0 degrees C. You decide that the ...
*February 23, 2012 by Jen*

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