1. chemistry

    a 2 l gas bulb contains 4.07*10^23 N2 molecules. If the pressure is 3.05bar, what is the rms speed of the N2 molecules? What is the temperature?

    asked by brandie on January 23, 2011
  2. Pre Chem

    A gas occupies a volume of exactly 500 mL at STP. What volume would it occupy at exactly 70°C and 400 mm of pressure?

    asked by Anonymous on April 21, 2014
  3. physics class

    Suppose that you balance a 5 kg ball on the tip of your finger that has an area of 1 cm2. What is the pressure on your finger?

    asked by Anonymous on April 16, 2015
  4. physics

    3. A 2.0-kg brick has the dimensions 7.5 cm „e 15 cm „e 30.0 cm. What is the pressure (in SI units) the brick exerts when standing on its largest face?

    asked by Anonymous on March 7, 2011
  5. Chemistry

    hydrogen gas collected by water displacement. what is the pressure with the H2 collected if temp 24degree C

    asked by Anonymous on April 17, 2019
  6. Chemistry

    A sample of 20.0 g of chlorine gas at 15 degrees Celsius occupies a volume of 5.0 L. What is the pressure of the gas?

    asked by Lauren on May 7, 2016
  7. technical drawings

    a circle of diameter 80mm and a line BC. The ratio of the circle to the line BC is 7:5. what is the true length of the line from the center of the circle.2. what is the actual diamter of the cirlce. thanks

    asked by hendrix on May 5, 2016
  8. chemistry

    A 10.0 ml diluted chloride sample required 44.89 ml of 0.01982 M AgNO3 to reach the Fajans end point. how many moles of Cl- ions were present in the sample? What was the concentration of chloride in the diluted solution?

    asked by lin on October 8, 2012
  9. physics

    Three moles of an ideal gas are compressed from 5.5*10^-2 to 2.5*10^-2 m^3. During the compression, 6.1*10^3J of work is done on the gas, and heat is removed to keep the temperature of the gas constant at all times. Find the temperature of the gas. Can

    asked by Stella on March 2, 2008
  10. Chemistry

    N2(g) + 3H2(g)  2NH3(g) at STP How many litres of ammonia gas is produced using 5 litres of H2? 5L H2 x (2L NH3 / 3L H2) = 3.33L NH3 How many moles of N2 are needed? 5L H2 x (1L N2 / 3L H2) x (1 mol N2 / 22.41L N2@STP) = 0.0744 mole N2

    asked by Shine bright shine far on March 5, 2019
  11. chemistry

    i have to do a "chemistry of cooking" project for my chem class. for the project i need to convert pounds, grams, and ounces into moles, but i do not know how. for example, i need to convert 453.5g of beef into mols. how do i do that? do i need to know the

    asked by joyce on February 18, 2010
  12. PHYSICS

    Three moles of an ideal gas are compressed from 5.5*10^-2 to 2.5*10^-2 m^3. During the compression, 6.1*10^3J of work is done on the gas, and heat is removed to keep the temperature of the gas constant at all times. Find the temperature of the gas. Can

    asked by sTELLA on March 2, 2008
  13. chemistry

    Consider an acid, HA, with pKa =3.33 0.025 moles of hydroxide ion are added to 17.4mL of a 0.519 M solution of the acid. What is the resulting pH? I know pKa=-log([Ka]) pH=-log([H+]) I don't know how to link this information. Thanks

    asked by Sarah on February 28, 2008
  14. Chemistry

    if antiseptic hydrogen peroxide is 3% H2O2 by mass, approximately how many moles of H2O2 are present in each gram of antiseptic solution? you can assume the solution has the same density as water. show your calculations.

    asked by Ivy on December 2, 2011
  15. ap chemistry

    Carbon monoxide reacts with oxygen to form carbon dioxide by the following reaction: 2CO(g) + O2(g) ! 2CO2(g) H for this reaction is −135.28 kcal. If 811.7 kcal is released, how many moles of CO must have reacted?

    asked by cheri on October 31, 2012
  16. Chem II - Equilibrium

    6.75 g of SO2Cl2 was placed in a 2.00L flask. At 648 K 0.0345 moles of SO2 was present. Kc for the reaction SO2Cl2 SO2 + Cl2 is _____ 3.83 x 10 -2 4.71 x 10 -3 1.12 x 10 -2 6.12 x 10 -4 Ok, on this one, I think I am missing something. Don't I need Kc if I

    asked by Ken on June 17, 2008
  17. Chem 32

    1)Number of moles in 2.2 grams of niacin? 2) which compound would not have a hydrogen bonding as a intermolecular attractive Force 1)H-O-CH3 2)CH3-CH2-CH2-O-CH3 3)NH3 4)H2O 5)CH3-NH2?

    asked by Shornora on February 7, 2018
  18. Chem

    A sample of co2 gas at 90.7 degree celsius has a volume of 300. ml at 810 mmHg. How many moles of co2 are present R=.08206 L atm/mol K 1 atm=760 mmHg

    asked by hanah on December 3, 2012
  19. Chemistry

    Calculate the mass of NaCl required to cause dissolution of 0.010 moles of AgCl in 100 mL of solution. Consider that the addition of NaCl does not cause increased volume in the solution KSP (AgCl) = 1.0 x 10 ^ -10 KF (AgCl2) = 3.0 x 10 ^ 5

    asked by Monica on April 15, 2016
  20. chemistry

    If a solution is diluted, say by adding 100ml of solvent, does the number of moles of solute change? Does the concentration increase, decrease, or stay the same? i think it depends on what the solvent is, for example if its water then the concentration

    asked by david on April 10, 2008
  21. Math

    Suppose that 600 meters of fencing are used to enclose a corral in the shape of a rectangle on three sides, and then a semicircle on the fourth side (The diameter of the semicircle is equal to the width of the rectangle). Find the dimensions of the corral

    asked by Alex on March 28, 2012
  22. math

    Moffett’s Candy Factory makes candy in the shape of cylinders. The net of a cylindrical piece of candy is shown below. two circle with diameter of 4cm each and a rectangle with a lenght of 1.5 cm wha is the total surface area of this piece of candy?

    asked by leo on January 19, 2014
  23. Physic

    Air moving at 13.0 m/s in a steady wind encounters a windmill of diameter 2.30 m and having an efficiency of 29.0%. The energy generated by the windmill is used to pump water from a well 31.0 m deep into a tank 2.30 m above the ground. At what rate in

    asked by Thanh on November 18, 2012
  24. Circles

    Imagine a stone henge from 3500 years ago. The outer circle consists of 30 stones, each standing 4m tall, 2m wide, and 1m thick. If the circle containing this regular polygon was 33m in diameter, approximately how far apart are the outer stones??

    asked by Robynn on October 16, 2007
  25. science

    . A parachutist jumps from a plane at 8000 ft altitude with a 24-ft diameter chute. Total weight of the jumper and the chute is 185 lbs. Determine the time to fall from 8000 ft to 5000 ft using the average fall velocity between the two elevations.

    asked by hassanian on February 12, 2011
  26. physics

    4. A rat named Littleguy runs in a treadmill (a wire wheel) with a diameter d =8.00 inches. In 5.00 minutes, Littleguy makes the treadmill rotate 2.80 x 10² times. If the rat were running along the ground, how far would he have run? What was his average

    asked by Arthur on September 7, 2012
  27. Physic

    Air moving at 13.0 m/s in a steady wind encounters a windmill of diameter 2.30 m and having an efficiency of 29.0%. The energy generated by the windmill is used to pump water from a well 31.0 m deep into a tank 2.30 m above the ground. At what rate in

    asked by Thanh on November 18, 2012
  28. physics

    The magnetic field shown in the figure decreases from 1.0 T to 0.4 T in 1.2 s. A 6.0 cm diameter loop with a resistance of 0.010 W is perpendicular to the field. a. Find the average emf induced in the coil during this time. b. What is the size and

    asked by kait on September 17, 2011
  29. PHYSiCS --

    Volts = 180 Diameter of Beam = 11 Radius of Beam = D/2 = 0.055 (cm) 1/R (m) = 18.18 Current in Coil (I) = 1.02 My calculations for B is not coming out correctly nor is my calculation for e/m How do I go about doing this. I mean I think Im inputting it

    asked by Reema on November 14, 2010
  30. physics

    A gold wire 5.90m long and of diameter 0.890 mm carries a current of 1.21A. A)Find the resistance of this wire. B)Find the potential difference between its ends. Can someone please help me I don't know how to answer these questions? R=p(L/A)

    asked by help on April 12, 2009
  31. Chemistry

    The shown chromatogram was recorded on a column of 30 m length and 0.32 mm internal diameter with a carrier gas flow rate of 2 mL/min. Determine the dead time of this column. I keep getting a dead time that is really really small but I know it should be

    asked by Derrek on February 4, 2011
  32. MATH

    A CIRCULAR COFFEE TABLE HAS A DIAMETER IF 5FT. WHAT WILL THE COST BE TO BE REFINISHED IF THE COMPANY CHARGES $3.00 PER SQUARE FOOT? A+=+pi%2Ar%5E2 r+=+2.5 A+=+pi%2A2.5%5E2 A+=+pi%2A6.25 A+=+19.635 ft2 If cost = C C+=+3%2A19.635 C = $58.90 answer

    asked by TANGIE on December 2, 2010
  33. PhYsIcS - RoTaTiOnAl MoTiOn

    A tire (0.8 m diameter) starts at rest and has an angular acceleration of 5 rad/s^2. If it moves for 10 seconds and then stops abruptly causing a blob of mud at the top of the tire to fly off, how far along the ground will the blob travel until it hits the

    asked by Robert on December 7, 2008
  34. physics

    A 126 kg student sits on a chair which is solely supported by a solid 0.4 meter-long steel rod 0.81 cm in diameter. To the nearest micron (millionth of a meter), what is the change in length of the rod produced by the student's weight?

    asked by clache on August 22, 2016
  35. p6

    A 5.40 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.510 T pointing up. During the course of 0.130 s, the field is changed to one of 0.300 T pointing down. What is the average induced emf in the

    asked by dude on October 9, 2010
  36. Physics

    A capacitor is made from two 1.2 cm diameter coins separated by a 0.18 mm thick piece of paper (K = 3.7). A 6 V battery is connected to the capacitor. How much charge is on each coin? My solution: C= K * Permitivity * A/d = q/v I solved for q and got 1.2 X

    asked by BLESSED on February 6, 2008
  37. English

    29. Whig Committee of New York, 199 Whig National Convention of 1852, 132-33 Whig National Convention of 1856, 168 Whig Party, 9, 10, 22, 26, 55, 71, 88-90, 132, 167 agenda of, 43-44 demise of, 130, (NNN) NNNNllllinois election and, 149 of New York,

    asked by BARNETTA on August 17, 2015
  38. CHEMISTRY

    HF + H2O H3O+ + F- By dissolving 0.03 mol HF in 1 L water , seen that [HF] at the equilibrium is 0.027 M , then : 1) If we divide 0.03 mol/ 1 L it would be 0.03 M , why that difference ? 2) How many moles HF in 1 L water is required to reach the

    asked by MAD on July 16, 2014
  39. chemistry

    If a total of 13.5 mol of NaHCO3 and 4.5 mol of C6H8O7 react, how many moles of CO2 and Na3C6H5O7 will be produced? 3NaHCO3(aq) + C6H8O7(aq) ƒ{ƒ®3CO2(g) + 3H2O(s) +Na3C6H5O7(aq)

    asked by natasha on July 29, 2008
  40. Chemistry

    If each balloon is filled with carbon dioxide at 20 deg. C and 1 atmosphere, calculate the mass and the number of moles of carbon dioxide in each balloon at maximum inflation.

    asked by Gary on January 26, 2014
  41. Chem

    A buffer contains 1.0mol CH3CO2H and 1.0mol CH3CO2^- diluted with water to 1.0L. How many moles of NaOH are required to increase the pH of the buffer to 5.10? (pKa oof Ch3CO2H=4.74)

    asked by Sean on March 25, 2010
  42. chemistry

    What mass in grams of an aqueous hydrochloric acid solution that is 37.0% by mass hydrogen chloride is needed to supply 2.000 moles of hydrogen chloride?

    asked by Li on October 4, 2011
  43. Chemistry

    The reaction 2NO + Cl2 2NOCl has Kc= 210 what is the equilibrium concentration of NO in moles per liter given the following Cl2= .46 NOCl= .43M at equilibrium. So far all ive gotten is 210= [.43]^2/[.46][NO]^2 where do I go from here please

    asked by Lauren on March 12, 2008
  44. Chemistry

    If a total of 13.5 mol of NaHCO3 and 4.5 mol of C6H8O7 react, how many moles of CO2 and Na3C6H5O7 will be produced? 3NaHCO3(aq) + C6H8O7(aq) > 3CO2(g) + 3H2O(s) + Na3C6H5O7(aq)

    asked by Liz on May 6, 2012
  45. chem

    mass of element = 311.1269 amu what is mass of 1.36 moles of these atoms in g Hint: (1 mol = 6.022 x 1023 atoms) and (1 amu = 1.6606 x 10-24 g) HELP!

    asked by Mike on October 15, 2007
  46. Chemistery

    consider the reaction N2O5 + h2o -> 2HNO3 how many moles of N2O5 must be dissolved into one more of H2O to obtain an aqueous solution of HNO3 in which the mole fraction of HNO3 is 0.5

    asked by PInk ROSEE on December 11, 2015
  47. Chem

    4C3H5N3O9 -> 6N2 + 12 CO2 + 10H20 + O2 a) how many grams of water would be produced if 75 g of nitroglycerin decompose? b) The creation of 3.89 moles of CO2 would require how many grams of nitroglycerin?

    asked by MAX on October 9, 2010
  48. AP Chemistry

    A mixture of 20.0 grams of CaO and BaO is placed in a 12.5 L vessel at 200oC with excess CO2 . The mixture is allowed to react to completion forming CaCO¬3 and BaCO3 .The pressure in the container after reaction is 220 torr. The solid carbonates are

    asked by Jim on January 2, 2015
  49. science

    a metallic cube of mass M and dencity D is kept on a table .find the pressure on table.

    asked by ranjan on May 5, 2012
  50. chemistry

    A 6.58g sample of compound was placed in a 12.6 L container. At 25.0*C, the pressure was found to be 0.75 atm. what is this compound?

    asked by Help on April 7, 2011
  51. Chemistry

    The volume of a gas is 76cm3 at 27c and 800mm mercury pressure.what is the volume at s.t.p

    asked by Okonkwo on August 1, 2014
  52. CHEMISTRY HELP ASAP

    A 1.26 g sample of He gas has a pressure of 0.123 atm and a volume of 32.6 L. What is the temperature of the sample, in °C?

    asked by Linda on December 19, 2012
  53. Chemistry

    If the volume of a gas @ STP is 300.0 ml, what is its volume at 25.0 C, assuming constant pressure?

    asked by Sam on February 21, 2019
  54. Chemistry

    A container of gas at 53 psi is compressed to one third its original volume. What is the new pressure of the gas?

    asked by Mark on January 26, 2017
  55. physics

    If tank of 10m height is filled half what will be pressure at bottom of tank

    asked by sourabh on October 22, 2014
  56. Chemistry

    What is the molar mass of a gas (96.0 g) in a 25.0 L container at 27.0 °C? The pressure inside the container is 3.04E5 Pa.

    asked by Amanda on November 15, 2014
  57. biochemistry

    the freezing point of blood serum is about -0.56 deg C. What is the osmotic pressure at 37 deg C?

    asked by Caselyn on June 21, 2013
  58. PHYSICS

    A LIVING ROOM HAS DIMENSIONS 3.5M X4.2M X4.2M .WHAT IS THE PRESSURE EXERTED BY THE AIR ON THE FLOOR IN THE ROOM

    asked by NANCY on March 2, 2019
  59. Chemistry

    10.7L of a gas at 1.75 atm are expanded to 20.0L at a mass constant temperature.what the new gas pressure?

    asked by Margaret on October 8, 2013
  60. chemistry

    A solution containing 26.05 mg of an unknown protein per 23.5 mL solution was found to have an osmotic pressure of 3.75 torr at 44 C.

    asked by M on January 25, 2010
  61. Chemistry

    10.7L of a gas at 1.75 atm are expanded to 20.0L at a mass constant temperature.what the new gas pressure?

    asked by Margaret on October 8, 2013
  62. SCIENCE

    HOW DO I CALCULATE THE PRESSURE EXERTED BY AN OIL EXPELLER ON THE OILSEED TO BRING OUT THE OIL

    asked by BIBI on May 31, 2012
  63. Chemistry

    10.7L of a gas at 1.75 atm are expanded to 20.0L at a mass constant temperature.what the new gas pressure?

    asked by Margaret on October 8, 2013
  64. physics

    what will the volume of a gas at 309K if its volume at 215K is 3.42 L? Assume the pressure is constant

    asked by frank on April 30, 2013
  65. Chemistry

    A gas initially at 20 degrees C it must be changed to (blank) degrees C to triple the pressure.

    asked by Robin on July 3, 2008
  66. Physical Science

    Using the kinetic theory, explain why the pressure of a gas increases when its temperature increases.

    asked by Wally on February 13, 2008
  67. physics

    if the force applied perpendicularly on a given surface is applied on a small area then pressure is?

    asked by ricajane on February 29, 2012
  68. physics

    A gas expands at constant pressure from 6.25 L at 13.1°C until the volume is 7.25 L. What is the final temperature (in K) of the gas?

    asked by maria on January 1, 2012
  69. college chem

    a 16 gram sample of oxygen has a volume of 11.2L at standard pressure . what is the temp of the oxygen ?

    asked by tom on September 1, 2017
  70. chemistry

    what is the partial pressure of hydrogen in a flask containing 2g hydrogen and 32g sulphur dioxide

    asked by Anonymous on November 20, 2014
  71. Chemistry

    In a reversible reaction PCl5 ↔ PCl3 + Cl2, the value of K is 2.5. What will the partial pressure of Cl2 be?

    asked by Sidharth on October 22, 2016
  72. 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

    asked by Tasha on December 5, 2011
  73. chemistry

    a gas occupies 400cm3 at 250k and 1.5 × 10^-5 wm^-2 pressure. what is the volume of the gas at stp?

    asked by ola on February 2, 2019
  74. Physics

    A swimming pool 16.0 m by 9.1 m and uniform depth is 2.0 m. What will be the pressure against the side of the pool near the bottom?

    asked by robin on November 1, 2010
  75. chemistry

    If the pressure, volume, and temperature of a gas are known, which can most likely be found by using the ideal gas law?

    asked by mo on May 18, 2017
  76. Chemistry

    A gaseous mixture consists of 6.95 g of N2, 4.75 g of O2, and 2.75 g of He. What volume does this mixture occupy at 23°C and 1.35 atm pressure?

    asked by Matt on November 18, 2012
  77. physics

    A gas of volume 2m^3 at 27C is heated to 327C at constant pressure. What is its new volume?

    asked by SMK on December 13, 2011
  78. Chemistry

    What is the molar mass of a gas (96.0 g) in a 25.0 L container at 27.0 °C? The pressure inside the container is 3.04E5 Pa.

    asked by Amanda on November 8, 2014
  79. Physics

    Calculate the water pressure at the bottom of the 100-m-high water tower

    asked by Rachel on November 10, 2013
  80. physic

    what would be the height of a water barometer if atmospheric pressure is 1.0*10^5 Pa and the density of water is 1.0*10^3 kg/m^3? (Hint. Use p= 10 hd)

    asked by ephraim on July 4, 2010
  81. physics

    can anyone show me how to do this? A container of gas is at a pressure of 3.7 * 10^5 Pa. how much work is done by the gas if its volume expands by 1.6 m^3? thanks

    asked by y912f on February 15, 2009
  82. chemistry

    20 g of CO2 is placed in 0.75l Bottle and sealed. what is the pressure in the bottle if the temp is 25C?

    asked by Jazzmin on December 1, 2011
  83. physics

    if the temperature is increased, how do we determine volume and pressure since T is proportional to V and P but V and P are indirectly proportional to each other.

    asked by phys on April 22, 2010
  84. Physics

    What is the weight of an object that has a base which is 3 square cm and which exerts a pressure of 21 kg per square meter?

    asked by Anonymous on May 25, 2017
  85. Chemistry

    what is the water vapor pressure of water at 29 degrees celsius? i can't find the information anywhere.

    asked by Heather on March 2, 2010
  86. Physics

    Help! Calculate the water pressure at the bottom of the 110--high water tower

    asked by Ericca on April 10, 2013
  87. math

    does it take more pressure to push water up a vertical pipe than the same pipe on a 45 degree incline

    asked by mike on August 2, 2012
  88. 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?

    asked by Venus on March 22, 2013
  89. Physics

    Calculate the water pressure at the bottom of the 110--high water tower

    asked by Ericca on April 9, 2013
  90. physics

    A gas of volume 2m^3 at 27C is heated to 327C at constant pressure. What is its new volume?

    asked by SMK on December 12, 2011
  91. Chemistry

    If the pressure on a 1.04 L sample of gas is doubled at the constant temperature, what will be the new volume of the gas?

    asked by Britt on October 27, 2010
  92. Chemistry

    At a pressure of 103kPa and a temperature of 22 degrees C, 52.9 g of a certain gas has a volume of 31.5 L. what is the identity of this gas?

    asked by Addy on April 27, 2014
  93. Chemistry

    A balloon holds 27.8 kg of helium. What is the volume of the balloon if the pressure is 0.97 atm and the temperature is 24 °C

    asked by Yakima valley communtiy college on May 27, 2015
  94. chemistry

    If 4.05 g of methane gas (CH4) is introduced into an evacuated 1.40 L container at 53°C, what is the pressure in the container?

    asked by kristen on April 20, 2010
  95. chemistry

    If 4.05 g of methane gas (CH4) is introduced into an evacuated 1.40 L container at 53°C, what is the pressure in the container?

    asked by kristen on April 20, 2010
  96. Physical Science

    If liquid pressure were the same at all depths, would there be a buoyant force on an object submerged in the liquid?

    asked by Sheila on October 23, 2012
  97. Physics

    How much pressure is exerted by a 5000 pound moving vehicle vehicle (hehicle is 6' x 12')?

    asked by Barry on November 6, 2010
  98. Chemistry

    what happen to the pressure of a gas inside a container if the temperature of the gas decreases?

    asked by Lyly Nguyen on April 13, 2010
  99. Chem

    A gas at pressure 912 mm of hg has volume of 450 cm3 what will be volume at 0.4 atm

    asked by Anonymous on October 18, 2016
  100. Chemistry 105

    A sample of N20 gas has a density of 2.65 g/L at 298 K. What must be the pressure of the gas (in mmHg )?

    asked by JULIE on October 23, 2011