Thursday

April 24, 2014

April 24, 2014

Number of results: 22,002

**Physics**

If we examine a ball in free fall, we find that the momentum of the ball is not constant. This is not a violation of the law of conservation of momentum because A) the force of gravity acts on the ball. B) the ball experiences an external force. C) the system is not closed. D...
*Tuesday, November 29, 2011 at 10:46pm by Crystal*

**Gas laws and pressure **

An automobile tire has a pressure of 325 kPa when the temperature is 10 degrees Celsius. If the temperature of the tire rises to 50 degrees Celsius and its volume is constant, what is the new pressure?
*Wednesday, October 3, 2012 at 8:53pm by Britani *

**calculus**

a 20 ft ladder is leaning against a wall. The bottom is being pulled out at a constant rate of 2.5 ft/sec. Will the top of the ladder clide sown thr wall at a constant rate? What will the rate be? In relation to time? It is not constant. Use pythagorus: x^2 + y^2 = l^2, where ...
*Thursday, October 12, 2006 at 6:45pm by Suzy*

**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?
*Tuesday, March 16, 2010 at 10:24pm by catherine*

**Chemistry 105**

A sample of nitrogen gas in a 1.86-L container exerts a pressure of 1.32 atm at 20 C. What is the pressure if the volume of the container is maintained constant and the temperature is raised to 354 C?
*Sunday, October 23, 2011 at 5:30pm by JULIE*

**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
*Sunday, February 9, 2014 at 8:04pm 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
*Sunday, February 9, 2014 at 8:04pm by Anonymous*

**AP Chem**

For the following equilibrium system, which of the following changes will form more CaCO3? CO2(g) + Ca(OH)2(s) <--> CaCO3(s) + H2O(l) deltaH(rxn) = -113 kJ My choices are: a) Decrease temperature at a constant pressure (no phase change) B) Increase volume at a constant ...
*Tuesday, February 26, 2013 at 1:31pm by Lisa*

**Physics**

Show that when the total external force acting on N particles is zero, the total external torque is independent of the choice of reference point O.
*Monday, March 10, 2014 at 9:17am by Ho*

**chemistry**

A piston has an external pressure of 9.00 atm. How much work has been done if the cylinder goes from a volume of 0.130 liters to 0.500 liters? can someone explain to me how am i supposed to do this please? Thanks :D
*Friday, November 25, 2011 at 12:03am by Yuli*

**Chemsitry II**

The partial pressure of CH4(g) is 0.185 atm and that of O2(g) is 0.300 atm in a mixture of the two gases. a) What is the mole fraction of each gas in the mixture? b) If the mixture occupies a volume of 11.5 L at 65 degress C, calculate the total number of moles of gas in the ...
*Thursday, May 10, 2007 at 7:13pm by Jayd*

**chemistry**

A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and occupies a volume of 5.70 L. (a) Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.75 atm while the temperature is held constant. (b) Use Charles's law to calculate ...
*Tuesday, April 27, 2010 at 6:02pm by Chase*

**chemistry**

A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and occupies a volume of 5.70 L. (a) Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.75 atm while the temperature is held constant. (b) Use Charles's law to calculate ...
*Friday, April 30, 2010 at 9:34am by chase*

**chemistry**

A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and occupies a volume of 5.70 L. (a) Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.75 atm while the temperature is held constant. (b) Use Charles's law to calculate ...
*Friday, April 30, 2010 at 9:35am by chase*

**Chemistry**

When solid CO2 (dry ice) is allowed to come to equilibrium in a closed constant volume container at room temperature (300K), 1. the pressure rises until it reaches 1 atm 2. the pressure rises until a liquid-gas equilibrium is reached. 3. the pressure does not change. 4. the ...
*Monday, January 31, 2011 at 12:58am by Douglas*

**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.
*Wednesday, April 22, 2009 at 2:01pm by Noemi*

**science**

This graph represents the relationship of the pressure and volume of a given mass of a gas at constant temperature. When the pressure equals 8 millimeters of mercury (mmHg), what is the volume, in milliliters (mL)?
*Wednesday, February 8, 2012 at 10:21pm by Anonymous*

**calculus**

Boyle's law states that if the temperature of a gas remains constant, then PV = c. Where P is the pressure, V is the volume, and c is a constant. Given a quantity of gas at constant temperature, if V is decreasing at a rate of 13 in.^3/s, at what rate is P increasing when P = ...
*Sunday, May 2, 2010 at 11:38pm by Hussain*

**vapor and osmotic pressure**

A solution of the sugar mannitol ( molar mass 182.2 g/mol ) is prepared by adding 54.66 g of mannitol to 1.000 kg of water. The vapor pressure of pure liquid water is 17.54 torr at 20o C. Mannitol is nonvolatile and does not ionize in aqueous solution. a.) Assuming that ...
*Thursday, October 12, 2006 at 3:03am by Amy*

**Chemistry help!**

A sample of gas at a temperature of 37.0°C has a pressure of 725 torr and occupies a volume of 3.44 L. a. Use Boyle’s law to calculate the new pressure if the temperature is held constant and the volume is increased to 6.54 L. torr b. Use Gay-Lussac’s law to calculate the new ...
*Wednesday, February 26, 2014 at 6:46pm by Chelsey*

**chemistry**

The instruction booklet for your pressure cooker indicates that its highest setting is 13.5psi . You know that standard atmospheric pressure is 14.7psi , so the booklet must mean 13.5psi above atmospheric pressure. At what temperature will your food cook in this pressure ...
*Sunday, January 25, 2009 at 11:49am by blah*

**Chemistry**

One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq) ? FeCl2(aq) + H2(g); (Delta)H°= –87.9 kJ How much heat is liberated at constant pressure if 0.215 g of iron reacts with 40.4 mL of 0.579 M HCl? How much heat ...
*Sunday, March 24, 2013 at 3:36pm by Raul*

**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?
*Tuesday, October 16, 2012 at 12:03am 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?
*Tuesday, October 16, 2012 at 12:12am by Shardae.*

**physics**

A craet is pulled right with a force of 82.0 N to the left with a force of 115N upward with a force of 565N and dow ward with a force of 236N Find the net external force in the x direction find the net external force in the y directin find the magnitude and direction of the ...
*Sunday, December 14, 2008 at 5:08pm by Physics*

**Chemistry**

Benzene has a heat of vaporization of 30.72 kj/mol and a normal boiling point of 80.1 degrees celsius. At what temperature does benzene boil when the external pressure is 480 torr? Can someone show me an equation and how to solve this?
*Tuesday, July 19, 2011 at 2:38pm by Anonymous*

**General Chemistry **

A piston has an external pressure of 7.00 atm. How much work has been done in joules if the cylinder goes from a volume of 0.130 liters to 0.650 liters. Express your answer with the appropriate units.
*Thursday, March 20, 2014 at 12:17pm by Jamie*

**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?
*Thursday, May 23, 2013 at 9:46am by ray*

**science**

explain the order of the planets due to the external environments by becoming solids, liquids, or gases. In the case of planet ordering, external environmental factors of gravity and temperature combine to dictate position from the Sun.why?
*Sunday, January 24, 2010 at 11:11am by danielle*

**chemistry**

11.31) solve for the new pressure when each of the following temperature changes occurs, with n and V constant: a. a gas sample has a pressure of 1200 torr at 155 celcius. what is the final pressure of the gas after the temperature has droped to 0 celcius? 1200 x12 celcius/0 ...
*Sunday, June 27, 2010 at 12:21am by Jetta*

**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?
*Tuesday, October 26, 2010 at 2:08pm by Kay*

**physics**

A rigid circular loop has a radius of 0.20 m and is in the xy-plane. A clockwise current I is carried by the loop, as shown. The magnitude of the magnetic moment of the loop is 0.75 A · m2. A uniform external magnetic field, B = 0.20 T in the positive x-direction, is present. ...
*Saturday, June 25, 2011 at 3:12am by Vlady*

**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
*Sunday, November 20, 2011 at 1:33pm by sandy*

**physics**

What is the total force on the bottom of a swimming pool 22.0 m by 8.9 m whose uniform depth is 1.6 m? What is the absolute pressure on the bottom of a swimming pool? What will be the pressure against the side of the pool near the bottom?
*Tuesday, November 16, 2010 at 9:46pm by Cory*

**Physics**

4) A 10 cm cylinder chamber has a 5cm diameter piston attached to one end. The piston is connected to an ideal spring with a spring constant of 10N/cm. Initially the spring is not compressed but is latched in place so that it cannot move. The cylinder is filled with a gas to a...
*Thursday, December 20, 2012 at 12:04am by P Vijay Kumar*

**Chemistry**

balloon is filled with 1.35 atm dimethyl ether gas and 5.25 atm of oxygen gas at 27 C degrees. They react: C2H6O (g) + 3O2 (g) --> 2CO2 (g) + 3H2O(g) The system is allowed to cool back down to 27 degrees Celsius following the reaction. assuming external pressure is still ...
*Wednesday, November 14, 2012 at 2:17pm by Anonymous*

**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 temperature ...
*Thursday, May 30, 2013 at 12:39am by Mathslover*

**Physics**

According to Boyle's law, the volume V of a gas at a constant temperature varies inversely with the pressure P. When the volume of a certain gas is 125 cubic meters, the pressure is 20 psi (pounds per square inch). If the volume of gas is increased to 400 cubic meters, the ...
*Friday, May 25, 2012 at 3:11am by Pat*

**Physics**

The velocity of a 629-kg auto is changed from 10.0 m/s to 44.0 m/s in 70.0 s by an external, constant force. (a) What is the resulting change in momentum of the car? (b) What is the magnitude of the force?
*Tuesday, December 2, 2008 at 6:22pm by Anonymous*

**Chemistry**

"Under constant conditions of P(pressure) and T(temperature) (and R [gas constant]), write an equation showing d(density) written as a function of M(molecular mass)." I don't understand this, really! Please help! Thanks in advance!
*Sunday, January 13, 2008 at 9:13pm by TAG*

**physics**

Nate is 165 cm tall, 40 cm wide, and weighs 710 N. He needs to walk ten blocks (1000 m) against a 50 km/h head-wind. Nate pushes on the ground with the minimum force that allows him to move slowly forward at a constant speed, and against the drag from the wind. How much energy...
*Wednesday, January 6, 2010 at 5:54pm by hilary*

**Physics**

A crate is pulled to the right with a force of 85.5 N, to the left with a force of 120.8 N, upward with a force of 652.1 N, and downward with a force of 249.5 N. What is the net external force in the x direction? Answer in units of N. What is the net external force in the y ...
*Monday, January 10, 2011 at 6:46pm by dmj697*

**Physics**

Any ideal gas temperature may be written as T = Ti*r where Ti=temp at ice point and r = lim(P/Pi) at constant V. Show that the fractional error in T is dT/T = dr/r + 3.73 drs/rs where r s = lim(Ps/Pi) at constant V. Ps is pressure at steam and Pi is pressure at ice point. Also...
*Wednesday, February 3, 2010 at 1:14am by Jane*

**Physics**

You fill your tires with air on a cold morning (-5degreesC) to 220-kPa gauge pressure, then drive into a 32degreesC desert. (a) Assuming the volume of air in the tires remains constant, what's the new gauge pressure? (b) what would be the gauge pressure if the volume of air ...
*Tuesday, January 24, 2012 at 10:18pm by Haylee*

**Chemistry**

A sample of air occupies 3.8 L when the pressure is 1.2 atm. (a) What volume does it occupy at 7.3 atm? (b) What pressure is required in order to compress it to 0.050 L? (The temperature is kept constant.) I already know the answers to each question, but do not understand how ...
*Monday, March 14, 2011 at 4:54pm by Alex*

**Science**

PRessure is measured in Pascals (Pa). What combination of units is the same as a Pascal? and When you exert a force on a fluid in a closed container, does the pressure increase, decrease or remain constant? I think it will increase, but I'm not totally sure.
*Monday, May 30, 2011 at 8:00pm by Erika*

**economics**

Provide a real-world example of a product (a good or service) that has either an external cost or external benefit associated with it and propose a government policy to adjust for the over- or underproduction of this product.
*Tuesday, November 18, 2008 at 8:34pm by laila*

**Chemistry**

The reaction for my lab is Mg(s)+2HCl(aq)--> MgCl2(aq)+H2(g) I need to find the pressure of the hydrogen gas. Initial Pressure = 0.98692 atm Total Pressure = 1.64816 atm I don't know if I calculated the pressure of hydrogen gas correctly. I used the formula Total Pressure=...
*Sunday, July 15, 2012 at 12:07am by Zach*

**Physics**

I don't see how I have enough information to answer this question If a car is traveling westward with a constant velocity of 20 m/s what is the net external velocity
*Monday, February 2, 2009 at 5:57pm by Physics*

**Physics**

Consider a glass with full of water of mass density ρ=1,000 kg/m3 and height h=20 cm. There's a circular hole in the bottom of the glass of radius r. The maximum pressure that pushes the water back into the hole is roughly (on the order of) p=σ/r, where σ=0.072 ...
*Monday, May 6, 2013 at 12:19am by Mathslover Please help*

**Physics Help**

Consider a glass with full of water of mass density ρ=1,000 kg/m3 and height h=20 cm. There's a circular hole in the bottom of the glass of radius r. The maximum pressure that pushes the water back into the hole is roughly (on the order of) p=σ/r, where σ=0.072 ...
*Wednesday, May 8, 2013 at 1:36am by Mathslover Please help*

**chemistry**

Benzene has a heat of vaporization of 30.72kJ/mol and a normal boiling point of 80.1 C. At what temperature does benzene boil when the external pressure is 490 ? I think I have the equation setup, but I can't figure out how to solve for T2..please help
*Sunday, July 10, 2011 at 9:31pm by hannah*

**Chemistry 3A**

the pressure of hydrogen gas in a constant volume cylinder is 4.25atm at 0 degrees celsius. what will the pressure be if the temp. is raised to 80 degress celsius? Also do we have to first convert celsius to kelvin?
*Tuesday, December 4, 2012 at 11:56am by Gurjot *

**more CHEM proofreading**

for this question A sample of air has a volume of 140.0 mL at 67 degrees celcius. At what temperature would its volume 50.0 mL at constant pressure I did 140.0 ml... 67+273=340 T2... 50.0 140.0=50.0 340=T2 340*50.0/140.0=121.4 This question i don't get because of the ...
*Sunday, April 27, 2008 at 8:06pm by jerson*

**Chemistry**

How would applying an external pressure on the following equilibrium affects the distribution of iodide between the polar (aqueous) and non polar (varsol) phases? I2+I^- --> I3^- All are aqueous solutions
*Wednesday, March 12, 2014 at 1:33am by Valamir*

**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)
*Wednesday, March 3, 2010 at 6:33pm by Tanisha *

**compressor operations**

We are operating a centrifugal compressor. The gas composition does not change during this excursion. While holding suction pressure and flowrate constant, the inlet temperature rises. What would you expect to happen to the discharge pressure, and why
*Wednesday, January 29, 2014 at 11:12pm by Tony*

**Physical Chemistry**

At 25.0 degree celcius, the equilibrium 2 NOBr (gas) --> 2 NO (gas) + BR2 (gas) is rapidly established. When 1.10 g of NOBr is placed in a 1.0 L vessel at 25.0 degree celcius, the equilibrium pressure is 0.355 bar. Calculate the equilibrium constant K. (Partial pressure P...
*Friday, October 20, 2006 at 6:24pm by Angela*

**physics**

The electric potential difference between two points A and B is 42v.What is the work done by an external agent in carring a charge of 0.00005c from A to B at constant speed? (a)0.002.1j(b)0.0008.4j(c)0.00021j(d)0.0084j
*Wednesday, August 28, 2013 at 2:33am by bless*

**Chemistry**

At a temperature of 30.°C, a gas inside a 1.50 L metal canister has a pressure of 760 torr. If the temperature is increased to 55°C (at constant volume), what is the new pressure of the gas?
*Tuesday, February 21, 2012 at 3:46pm by Kyle2*

**chem**

At 119 degrees C, the pressure of a sample of nitrogen is 1.94 atm. What will the pressure be at 282 degrees C, assuming constant volume? Answer in units of atm
*Thursday, April 19, 2012 at 12:01am by luke*

**chemistry**

The volume of a gas is 250 mL at 340.0 kPa pressure. With the temperature remaining constant, what will the volume be when the pressure is reduced to 50.0 kPa? Don't forget the units.
*Monday, June 11, 2012 at 5:08pm by dimo*

**chemistry**

t 103 ◦ C, the pressure of a sample of nitrogen is 1 . 89 atm. What will the pressure be at 275 ◦ C, assuming constant volume? Answer in units of atm
*Thursday, April 4, 2013 at 8:44pm by Kyle*

**Chemistry**

At 103◦C, the pressure of a sample of nitrogen is 1.89 atm. What will the pressure be at 275◦C, assuming constant volume? Answer in units of atm
*Thursday, April 4, 2013 at 8:49pm by Kyle*

**pressure**

an ideal gas in a sealed container has an initial volume of 2.70L. at constant pressure, it is cooled to 25.00 C where its final volume is 1.75L. what was the initial temperature?
*Wednesday, September 18, 2013 at 6:13pm by Anonymous*

**college**

One mole of oxygen gas is at a pressure of 5.10 atm and a temperature of 32.0°C. (a) If the gas is heated at constant volume until the pressure triples, what is the final temperature?
*Wednesday, February 24, 2010 at 1:28am by Anonymous*

**Chemistry**

A sample of methane gas at room temperature has a pressure of 1.50 atm and a volumne of 10.5 L. If the temperature is kept constant, what will be the new volume if the pressure is increased to 2.00 atm?
*Sunday, June 3, 2012 at 9:36pm by Mary*

**science**

The gas in a cylinder with a piston has a volume of 2.4 m3 and a pressure of 120 kpa/ keeping the tempture constant the pressure is changed to 240 kpa. what is the new volume?
*Thursday, October 3, 2013 at 7:33pm by Trisha G.*

**PHYSICS!**

Two blocks are connected by a massless cord and are being pulled to the right by an external force F. They are accelerating at 2 m/s2. If needed, use g = 10 m/s2. With a coefficient of kinetic friction of 0.3, the external force acting on the 8 kg block is most nearly A.55 N B...
*Friday, May 25, 2012 at 5:38pm by Katie*

**Chemistry**

At 125 degrees Celsius, the pressure of a sample of He gas is 345 mmHg. At what temperature degrees Celsius will the pressure become 690 mm Hg, if the volume remains constant?
*Sunday, July 28, 2013 at 4:27pm by Hanna*

**Physics..**

A container of gas is at a pressure of 1.3x10^5 Pa and a volume of 6.0m^3. How much work is done by the gas if it expands at constant pressure to twice its initial volume? Please help me I really dont know what to do,,,
*Wednesday, December 11, 2013 at 12:00pm by cheesecake:)*

**Chemistry**

At a temperature of 57oC, a gas inside a 5.30 L metal canister has a pressure of 4000 torr. If the temperature is decreased to 13oC (at constant volume), what is the new pressure of the gas?
*Wednesday, February 26, 2014 at 3:03pm by Chelsey*

**chemistry**

The volume of a gas is 250 mL at 340.0 kPa pressure. What will the volume be when the pressure is reduced to 50.0 kPa, assuming the temperature remains constant?
*Tuesday, July 29, 2008 at 2:11pm by natasha*

**chemistry**

The volume of a gas is 250 mL at 340.0 kPa pressure. What will the volume be when the pressure is reduced to 50.0 kPa, assuming the temperature remains constant?
*Monday, August 4, 2008 at 11:21am by kayla*

**CHEMISTRY**

The volume of a gas is 250 mL at 340.0 kPa pressure. What will the volume be when the pressure is reduced to 50.0 kPa, assuming the temperature remains constant?
*Tuesday, August 12, 2008 at 4:54pm by natasha*

**chemistry**

At a pressure of 405 kPa, the volume of a gas is 6.00 cm3. Assuming the temperature remains constant, at what pressure will the new volume be 4.00 cm3?
*Thursday, February 24, 2011 at 2:12am by sara*

**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.)
*Sunday, October 23, 2011 at 5:24pm by JULIE*

**Chemistry**

The volume of a gas is 250 mL at 340.0 kPa pressure. What will the volume be when the pressure is reduced to 50.0 kPa, assuming the temperature remains constant?
*Sunday, May 6, 2012 at 10:48pm by George*

**chemistry**

the volume of a gas is 250 mL at 350 kPa pressure. what will the volume be when the pressure is reduced to 50 kPa, assuming the temperature remains constant?
*Wednesday, May 30, 2012 at 12:41pm by jose*

**science**

3. Liquefied air (assuming it is only O2 and N2) is kept in a container where pressure and temperature can be controlled. a. What is the maximum temperature at which the mixture exists as a liquid? If this temperature is kept constant, what is the minimum pressure to keep the ...
*Tuesday, March 11, 2014 at 2:13pm by haha*

**Physical Chemistry HELP!!!!!**

A solution of the sugar mannitol ( molar mass 182.2 g/mol ) is prepared by adding 54.66 g of mannitol to 1.000 kg of water. The vapor pressure of pure liquid water is 17.54 torr at 20o C. Mannitol is nonvolatile and does not ionize in aqueous solution. a.) Assuming that ...
*Saturday, October 14, 2006 at 5:29am by Lan*

**Physics**

A crate is pulled right with a force of 82.0N to the left wtih a force of 115N upward with a force of 565N and downward with a force of 236N Fine the net external force in the X direction Find the net external force in the y direction find the the magnitude and direction of ...
*Sunday, December 14, 2008 at 4:16pm by Physics*

**chemistry**

A gas sample occupying a volume of 88.7 mL at a pressure of O.917 atm is allowed to expand at constant temperature until its pressure reaches 0.335 atm. what is its final volume?
*Friday, June 18, 2010 at 1:44pm by Amanda*

**jordan high**

A sample of a gas at 0.63 atm occupies a volume of 324 mL. If the temperature remains constant, what will be the new pressure if the volume increases to 124 mL? new pressure=_____atm
*Sunday, April 10, 2011 at 12:00am by Anonymous*

**chemistry**

A 300 mL sample of hydrogen gas is at a pressure of 0.500 kPa. If the pressure increases to 0.750 kPa, what will be the final volume of the sample? Assume that the temperature stays constant
*Monday, February 13, 2012 at 9:08pm by Kristyn*

**chemistry**

A 300 mL sample of hydrogen gas is at a pressure of 0.500 kPa. If the pressure increases to 0.750 kPa, what will be the final volume of the sample? Assume that the temperature stays constant
*Monday, February 13, 2012 at 9:09pm by Kristyn*

**Chemistry**

At T = 25 degrees Celsius, the reaction No2 <-> 2NO +O2 has an equilibrium constant K=5.0*10^-13. Suppose the container is filled with NO2 at an initial pressure of 0.25 atm. Calculate the partial pressure of NO at equilibrium
*Thursday, November 29, 2012 at 5:09am by Paul*

**Chemistry**

At T = 25 degrees Celsius, the reaction No2 <-> 2NO +O2 has an equilibrium constant K=5.0*10^-13. Suppose the container is filled with NO2 at an initial pressure of 0.25 atm. Calculate the partial pressure of NO at equilibrium
*Thursday, November 29, 2012 at 5:09am by Paul*

**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?
*Tuesday, May 7, 2013 at 8:11pm 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?
*Tuesday, May 7, 2013 at 9:27pm by Logan*

**Chemistry**

When 0.40 g of impure zinc reacted with an excess of hydrochloric acid, 127 mL of hydrogen was collected over water at 10 degress C The external pressure was 737.7 Torr. a) What volume would the dry hydrogen occupy at 1.00 atm and 298 K ? b) What amount (in moles) of H2 was ...
*Thursday, December 13, 2012 at 1:56am by Sandy*

**chem**

A sample of gas has an initial volume of 32.6L at a pressure of 1.2atm.If the sample is compressed to a volume of 13.4L , what will its pressure be? (Assume constant temperature.)
*Monday, October 7, 2013 at 4:11pm by kristine*

**chemistry**

a gas has a volume of 95 mL at a pressure of 930 torr. What volume will the gas occupy at standard temperature if pressure is held constant?
*Sunday, January 26, 2014 at 3:48pm by Mikhail*

**Chem**

The relationship between volume and pressure (at constant temperature) is directly proportional. my answer- True The relationship between pressure and temperature (at constant volume) is inversely proportional. my answer- True The relationship between volume and temperature (...
*Sunday, October 17, 2010 at 9:44pm by chris*

**Chemistry**

A quantity of gas under a pressure of 302 kPa has a volume of 600. cm3. The pressure is increased to 545 kPa, while the temperature is kept constant. What is the new volume?
*Thursday, March 31, 2011 at 9:44pm by Aubrey*

**Chemistry**

A quantity of gas under a pressure of 302 kPa has a volume of 600. cm3. The pressure is increased to 545 kPa, while the temperature is kept constant. What is the new volume?
*Thursday, March 31, 2011 at 9:45pm by Aubrey*

**Chemistry **

At a temperature of 57oC, a gas inside a 5.30 L metal canister has a pressure of 4000 torr. If the temperature is decreased to 13oC (at constant volume), what is the new pressure of the gas? I know you use the formula (P1/T1) = (P2/T2)
*Wednesday, February 26, 2014 at 4:35pm by Chelsey*

**math**

The radius of a sphere immersed in an infinite ocean of incompressible fluid with density according to the equation, R(t) = A + a cos(nt), where R(t) is a function of time, t, and A, constants, with ‘a’ being positive. The fluid moves radially under no external forces and ...
*Wednesday, October 12, 2011 at 7:56am by paul gokool*

**Chemistry**

A balloon originally had a volume of 6.63 L at 86 °C and a pressure of 684 torr. The balloon must be cooled to __________°C to reduce its volume to 6.03 L (at constant pressure). Express answer to the tenth decimal place
*Thursday, April 22, 2010 at 9:40am by Camarra*

**science**

A fixed quantity of gas at 22°C exhibits a pressure of 739 torr and occupies a volume of 5.46 (a) Calculate the volume the gas will occupy if the pressure is increased to 1.74 atm while the temperature is held constant.
*Friday, December 14, 2012 at 5:31pm by Samantha*

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