1. chemistry

    How many grams of hydrogen are collected in a reaction where 1.80L of hydrogen gas is collected over water at a temperature of 40degrees C and a total pressure of 738torr?

    asked by Jessica on April 28, 2012
  2. Chemistry

    The ion-product of pure water, Kw, is 2.51 * 10(-14) at the body temp of 37 degrees Celcius. What are the molar H2O and OH concentrations in the pure water temperature?

    asked by Leroy on November 19, 2014
  3. Chemistry

    Two 20.0g ice cubes at -10.0 C are placed into 275g of water at 25.0 C. Assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts.

    asked by Josh on July 9, 2011
  4. Chemistry

    How much energy must you use to raise the temperature of 100 grams of water from 60 degrees Celsius to 70 degrees Celsius? show you calculations. I am confused on how to use formulas.

    asked by Michael on September 23, 2014
  5. chemistry

    Two substance have the same mass and are both initially at 15.0 C. They both absorb 110 J energy. Which substance will have the higher temperature, the one with the higher or lower specific heat? Explain

    asked by miyabi on November 30, 2015
  6. physics

    the distance between the marks of 0 degree centigrade and 100 degree centigrade is 12cm and if the level of mercury thread is at 4.8 cm then what would be the temperature in celsius scale?

    asked by Hareem on December 9, 2011
  7. Chemistry 105

    An experiment shows that a 114 mL gas sample has a mass of 0.168 g at a pressure of 697mmHg and a temperature of 30 C. What is the molar mass of the gas? in g/mol

    asked by JULIE on October 23, 2011
  8. 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.

    asked by Layney on October 12, 2012
  9. Geometry WP

    While in Europe, Allison heard a weather forecast that said the temperature would be 22°C (this is about 74°F). Give a rule that could give Allison an easy way to convert from Celsius to Fahrenheit

    asked by Felicia on June 13, 2010
  10. Chemistry

    A flexible plastic container contains 0.833 g of helium gas in a volume of 18.3 L. If 0.203 g of helium is removed at constant pressure and temperature, what will be the new volume?

    asked by Anonymous on May 29, 2016
  11. kimball

    How many kilojoules of heat must be transferred to a 480-g aluminum pizza pan to raise its temperature from 22 degrees celsius to 234 degrees celsius?

    asked by juan on May 28, 2013
  12. Chemistry

    Assume the heat absorbed by the calorimeter was 200J. What is the calorimeter constant (Heat Capacity) if the temperature changed from 22C to 26C? I know the answer is 50 J/k. But I am not sure how to get this.

    asked by Lance on June 27, 2011
  13. chemistry

    a 23.8 g sample of unknown metal heated at 100 degrees c is placed in 50.0 mL of water at 24 degrees c resulting in 8.5 c temperature increase. What is the specific heat of the metal

    asked by Paula on March 12, 2013
  14. Physical Science

    A sample of gas has its number of molecules halved, its Kelvin temperature doubled, and its volume halved. What is the new pressure, relative to the original pressure?

    asked by jasmine on March 17, 2014
  15. General Chemistry

    What happens to the rate of evaporation of a liquid after… a. a decrease in temperature b. an increase in the surface area of a liquid exposed to air c. an increase in the intermolecular forces

    asked by Sophie on July 14, 2010
  16. Physics

    Work of 700 J is done by stirring an insulated beaker containing 110 g of water. (a) What is the change in the internal energy of the system? J (b) What is the change in the temperature of the water? °C

    asked by Tiffany on March 30, 2012
  17. Honors Chem B

    Suppose you want to heat a mug of H2O (250ml) from room temperature 25 degrees celcius to 100 degrees celcius. How much energy would you need from your microwave?

    asked by Deahna on September 1, 2011
  18. chemistry

    A sample of gas has a mass of 0.555g . Its volume is 114L at a temperature of 80degrees C and a pressure of 744mmHg .Find the molar mass of the gas

    asked by Jess on April 28, 2012
  19. Algebra

    Which of the following examples would show a negative trend? A.height and weight of students B.test scores and height of students C.outside temperature and heating bill D.none of these I think it is D....?

    asked by Cassie on February 26, 2013
  20. Chemistry

    Uranium hexafloride is a solid at room temperature, but it boils at 56C. Determine the density of uranium hexafloride at 60C and 745 Torr.

    asked by Victoria on July 6, 2010
  21. chemistry

    An experiment shows that a 111ml gas sample has a mass of 0.161g at a pressure of 725mmHG and a temperature of 36degrees C.What is the molar mass of the gas?

    asked by Jess on April 28, 2012
  22. chemistry

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

    asked by Dakota on October 18, 2010
  23. AP Chem

    The vapor pressure of diethyl ether C2H5OC2H5 is greater than the vapor pressure of ethyl alcohol, C2H5OH at any temperature. Which best accounts for this difference?

    asked by Anonymous on January 23, 2013
  24. Chemistry

    if 16.5 liters of gas X is at 398 torr and -90.5 degrees celsius, what would be the volume of this same gas if the pressure is changed to 3.1 atmospheres and the temperature is changed to 399K

    asked by Kevin on December 4, 2015
  25. Physics

    Drug has heat of melting 25 K jule/mole. Solubility of drug in water is 0.00082 M at 25 C and 0.00144M at 35 C. Find mole fractions x1 and x2 at each temperature.

    asked by kinjal on December 17, 2010
  26. chemistry

    Pure water has a density of 1.00 g/ml at 297 . Calculate the molar concentration of pure water at this temperature. Would i just convert grams to moles, and ml to liters?

    asked by K on March 28, 2013
  27. Physics

    Where do I find the answer of: What affects the length of a bridge, ie. cross sectional area, construction material, change in temperature or the length of the bridge?

    asked by Rebecca on June 27, 2010
  28. chemistry

    The rate constant of a first-order reaction is 4.25 x 10^-4 s^-1 at 350 Celsius. If the activation energy is 103 kJ/mol, calculate the temperature at which its rate constant is 8.75 x 10^-4 s^-1.

    asked by santoki on March 25, 2014
  29. Chemistry

    When 4.76 g of a solid mixture composed of NH4Cl and CaCl2 was dissolved in 100.0 mL of water, the temperature of the water rose by 4.73°C. How many grams of each substance was in the mixture?

    asked by Anonymous on December 9, 2018
  30. chemisty

    A 3.2 liter sample of gas is at 40.0oC and 1.0 atmosphere of pressure. If the temperature decreases to 20oC and the pressure decreases to 0.60 atmospheres, what is the new volume in liters?

    asked by sheshe on March 4, 2011
  31. chemistry

    A 50g chunk of metal (c=0.0506 j/g°C) is heated to 60°C. it is then dropped into a calorimeter(c=1.40 j/g°C,m=5.0 g)that contains 100.0g of an unknown liquid. the temperature of the liquid raises from 15°C to 20°C.What is the c of the calorimeter?

    asked by liz on September 23, 2014
  32. 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?

    asked by jen on November 5, 2011
  33. Science

    How many grams of oxygen are collected in a reaction where 230. mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?

    asked by JJ on February 16, 2012
  34. chemistry

    liquids such as ethanol have a greater vapour pressure than water for any given temperature. comment on the strength of the intermolecular forces in ethanol compared to water.

    asked by Emma on May 27, 2007
  35. CHEMISTRY.

    Lowering of vapor pressure is directly proportional to: a) Temperature b) Mole fraction of Solute c) Mole fraction of Solvent d) Amount of solution

    asked by Riana on December 15, 2013
  36. chemistry

    even every air can be changed in to liquid at certain pressure and temperature, why our earth tend to change water at gaseous state to liquid state and by what conditions?

    asked by karthika on February 18, 2010
  37. The polythecnic Ibadan

    The volume of a fixed mass of a gas in a cylinder at constant temperature is 300cm,when the pressure is 900mmHg.calculate the new volume when the pressure is 600mmHg.

    asked by Akanho jamiu Adeoye on August 20, 2015
  38. Pre-Algebra

    Which of the following examples would show a negative trend? height and weight of students test scores and height of students outside temperature and heating bill none of these

    asked by TasteTheRainbow on February 28, 2013
  39. physics

    The brass bar and the aluminum bar in the drawing are each attached to an immovable wall. At 29.0 °C the air gap between the rods is 1.93 x 10-3 m. At what temperature will the gap be closed?

    asked by ashley on June 14, 2015
  40. chemistry

    An experiment shows that a 250mL gas sample has a mass of 0.433g at a pressure of 740 mmHg and a temperature of 29 C. What is the molar mass of the gas?

    asked by Anonymous on October 13, 2008
  41. CHEMISTRY.

    Lowering of vapor pressure is directly proportional to: a) Temperature b) Mole fraction of Solute c) Mole fraction of Solvent d) Amount of solution

    asked by Riana on December 15, 2013
  42. physics

    A copper block is removed from a 310 C oven and dropped into 1.10 kg of water at 20.2 C. The water quickly reaches 25.4 C and then remains at that temperature.what is the mass of the block?

    asked by Anonymous on August 9, 2012
  43. chemistry

    The melting temperatures of the two isomers of molecular formula C2H6O are-139 °c and-115 °c. Knowing that one of the isomers is an alcohol and the other a ether, indicate the melting temperature corresponding to each of them

    asked by william on July 13, 2018
  44. science

    The specific heat of solid gold is 0.13J/gC.How much heat is needed to raise the temperature of 25.0g of gold from 23C to its melting point at 1063C

    asked by Toni on July 15, 2011
  45. chemistry

    If the volume is 226 L at 1.7 atm, find the volume at 2.8 atm. Assume the temperature and amount of gas remain constant. Answer in units of L.

    asked by teresa on May 6, 2015
  46. chemistry

    Equilibrium constant K for some reaction at temperature 300K was found to be 100 .Calculate equilibrium for same reaction at 400K if R= 8.23 change in enthalpy is 5000J

    asked by shashank on August 18, 2014
  47. physics

    A flight attendant wants to change the temperature of the air in the cabin from 18.0° C to 23.3° C without changing the number of moles of air per m3. What fractional change in pressure would be required?

    asked by loraina on April 12, 2010
  48. physics

    A light bulb, after it has reached its operation temperature, is connected across a potential difference of 120V while 0.5A of current passses through it. What is the resistance of the light bulb?

    asked by joh on September 28, 2009
  49. Chem1020

    Please help me!!! A sample of gas has a mass of 0.570 g . Its volume is 109 mL at a temperature of 95 ∘C and a pressure of 754 mmHg .Find the molar mass of the gas.

    asked by Liselle on November 19, 2016
  50. physical science

    An oxygen gas tank has a volume of 8 L and a pressure of 1500 N/m2. If the temperature decreases from 2500 K to 2000 K and its volume increases to 24 L, what is its final pressure?

    asked by Samantha on December 26, 2011
  51. Chemistry

    It requires 120 J of heat to raise the temperature of 70.0 g of rhodium from 280.0 K to 287.8 K. What is the molar heat capacity of rhodium?

    asked by Kales on October 23, 2014
  52. chemistry

    Calculate the final temperature if 50 kg of iron is heated from 15.0°C with 5000 kJ of heat. The molar heat capacity of iron is 25.08 J mol–1 K–1.

    asked by Lisa on January 24, 2015
  53. chem

    400.0g of a metal absorbs 10000.J of heat energy and its temperature rises from 20.0*C to 103.0*C. What is he specific heat of the metal

    asked by san b on September 14, 2010
  54. science

    The density of a 1.0 M solution of NaCl is 1.04 g/mL and its specific heat, c, is 3.06 J/C*g. How much heat is absorbed by 3.14 mL of this solution if the temperature rises from 18.6C to 29.7C? q=m*C*delta T (1.04g)(3.06)(11.1K)=35.32 is that right?

    asked by megan on October 22, 2009
  55. algebra

    Solve the indicated variable: 1. Volume of a cone: solve for h: V=¨ir^2h/3 2. Temperature formula: solve for C: F=9/5C+32 pleaseeeee help me solve these! plzzz! i have nooo idea how to do these. THANKS! =)))

    asked by kitty kat on September 20, 2009
  56. Physics

    A 5.00x10^2-g block of metal absorbs 5016 J of heat when its temperature canges from 20.0 C to 30.0 C. Calculate the specific heat of the metal ..?

    asked by Alayna on March 29, 2011
  57. Chemistry

    A gas at a temperature of 95 degrees C occupies a volume of 159 mL. Assuming constant pressure, determine the volume at 15 degrees C.

    asked by Tina on August 2, 2011
  58. physics

    A storage tank at stp contains 18.5kg of nitrogen. What is the volume of the tank and what would the pressure be if you added another 15kg of nitrogen at the same temperature?

    asked by Mark on April 19, 2011
  59. chemistry

    How much heat energy is needed to change the temperature of 25.00 mL of water from 5.0°C to 75.0°C? The molar heat capacity of water for this process Cp = 75.38 J/(mol °C), d = 1.00 g/mL.

    asked by Anonymous on May 6, 2014
  60. Integrated Physics and Chemistry

    If the kinetic energy of a sample increases, the ____ will also increase. A)potential energy B)temperature C)chemical energy D)nuclear energy

    asked by Ashley!! on April 21, 2011
  61. Chemistry

    methanol and aluminum are reacted. how many moles of methanol must burn to raise the temperature of 100g of aluminum by 80 degrees Celsius?

    asked by Ashlee on January 13, 2011
  62. Chem Apps

    The solubility of sugar (surcose) in water is 4.0 g/mL at room temperature, what is the maximum amount of sugar that will dissolve in 850 mL of water?

    asked by Katie on January 21, 2010
  63. chemistry

    A sample containing 4.8 g of O2 gas has a volume of 15.0L. Pressure and temperature remain constant. What is the volume after 4.00g of He is added to the 4.8g of O2 gas in the container

    asked by Boo Boo on November 16, 2012
  64. chemistry

    You mix 50.0 ml of 2.0 M HCl and 50.0 ml of 2.0M NaOH. The temperature of the resulting solution increases from 22.5 degrees celcius to 32.3 degrees celcius. What is the q of the calorimeter

    asked by Anonymous on October 12, 2014
  65. chemistry!

    An ideal gas has a volume of 3.0 L. If the number of moles of gas and the temperature are doubled, while the pressure remains constant, what is the new volume?

    asked by jenny on May 4, 2010
  66. chemistry

    a 100g sample of wate at 90oC is added to a 500g sample of water at 10oC. what is the final temperature of the water

    asked by julius on August 15, 2011
  67. Science, Chemistry

    2) Find the temperature at which air posses a density equal to that of hydrogen at 0°C. Density of air at STP is 14.4. Ans: 3658.2 °C.

    asked by Rajat on January 19, 2015
  68. chemistry

    A sample containing 4.8g of O2 gas has a volume of 15.0L. Pressure and temperature remain constant. What is the new volume if 0.500 mole of O2 gas is added?

    asked by Boo Boo on November 16, 2012
  69. chemistry

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

    asked by Kat on April 28, 2013
  70. physics

    If 3.68 m^3 of a gas initially at STP is placed under a pressure of 3.61 atm, the temperature of the gas rises to 34.2 degrees C. What is the volume? Need step by step help.

    asked by Anonymous on May 2, 2010
  71. chemistry

    a gas has a volume of 2 liters at 323 K and 3 atms. what will the new volume be if the temperature is lowered to 273 K and the pressure is lowered to 1 atm?

    asked by Anonymous on April 18, 2010
  72. Chemistry

    To increase the solubility of a gas at constant temperature from 1.20 g/L at 1.4atm to 2.3 g/L the pressure would have to be increased to ______ A. 0.37 atm B. 0.7 atm C. 1.37 atm D. 2.7 atm

    asked by Kathie on May 4, 2010
  73. chemistry

    The following reation has the following standard thermodynamic parameters: delta H= -33.6 kJ/mol delta S= -59.8 J/(mol*K). C(g) + D(g) --> E(g) Calculate the temperature at which the reaction becomes nonspontaneous.

    asked by Brunette on October 5, 2012
  74. chemistry

    the pressure on 200 milliliters of a gas at constant temperature is changed from 50.65 kPa to 101.3 kPa. what is the new volume of the gas?

    asked by john on December 18, 2010
  75. Chemistry

    At a particular temperature, K = 2.0 10-6 mol/L for the following reaction. 2 CO2(g) 2 CO(g) + O2(g) If 1.8 mol CO2 is initially placed into a 5.9-L vessel, calculate the equilibrium concentrations of all species.

    asked by Elizabeth on February 20, 2012
  76. chemistry

    The volume of a gas is 5.80 L, measured at 1.00 atm. What is the pressure of the gas in mmHg if the volume is changed to 9.65 L? (The temperature remains constant.)

    asked by rasheedat on November 15, 2010
  77. Chemistry

    What is the ratio of the speed of methane gas to the speed of sulfur dioxide gas if both gases ate at the same pressure and temperature?

    asked by Sarah on February 18, 2010
  78. chemistry

    The total pressure in a 11.3 L automobile tire is 44 psi at 11°C. By how much does the pressure in the tire rise if it warms to a temperature of 29°C and the volume remains at 11.3 L?

    asked by HELP on February 10, 2011
  79. chemistry

    An unknown substance has a mass of 17.3 . When the substance absorbs 1.557×102 of heat, the temperature of the substance is raised from 25.0 to 45.0 . What is the most likely identity of the substance?

    asked by Kyle on September 20, 2010
  80. Geography

    What happens to temperature and precipitation as one moves inland and away from water bodies? I know that land heats and cools faster than water bodies.

    asked by Sara on February 17, 2011
  81. Science

    Suppose that 9 grams of a certain substance lost 17.5 calories of heat when the temperature decreased from 70 degrees Celsius to 62 degrees Celsius. What is the Cp

    asked by Wyatt on October 23, 2013
  82. physics

    Calculate the amount of heat required to raise the temperature of 1kg of water from 30 degrees celsius to 60 degrees Celsius

    asked by g on February 16, 2016
  83. Science---Hurry Please Help!

    If Earth were located where Mars is in space, the temperature of Earth would A) be significantly higher. B) be significantly lower. C) be about the same. D) fluctuate greatly. B maybe?

    asked by Ameenata on March 30, 2017
  84. chemistry

    calculate the number of moles of carbon dioxide in a volume of 50.0 mL of carbon dioxide, assuming a pressure of 1.00 atm and a temperature of 23.0C

    asked by annie on July 27, 2010
  85. phy

    An ordinary glass is filled to the brim with 350.0 mL of water at 100°C. If the temperature decreased to 19°C, how much water could be added to the glass?

    asked by ami on November 24, 2010
  86. chemistry

    Under the same condition temperature and pressure hydrogen diffuses 8 times as fast as gas y calculate the rmm of gas y the rmm of h=2

    asked by Anonymous on March 18, 2017
  87. Math

    write an inequality representing the temperature t of the ocean water during the formation of the hurricane if the ocean water is above 80 degrees farenheit

    asked by Angelina on March 9, 2015
  88. physics

    Others say that the balloon was 23 metres high and 14 metres wide. Calculate the temperature of the air in the balloon (in degrees Celsius) for this situation as well

    asked by Nick on March 26, 2014
  89. physics

    What amount of heat is required to increase the temperature of 75.0 grams of gold from 150°C to 250°C? The specific heat of gold is 0.13 J/g°C.

    asked by Anonymous on March 19, 2012
  90. 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.

    asked by frank fred on March 21, 2012
  91. Chemistry

    There is a balloon filled with methane,CH4. If the mass of the methane is 68.34g, what is the volume of the balloon at 0.805 atm and a temperature of -10*C?

    asked by Mindy on November 11, 2011
  92. Algebra Math

    The function given by f (x) = 9/5 x + 32 converts x degrees Celsius to an equivalent temperature in degrees Fahrenheit. (a) Is f a one-to-one function? Why or why not? (b) Find f -1(x) and interpret what it calculates

    asked by Tamie on April 23, 2013
  93. physics

    A hole is drilled through a copper plate whose temperature is 17.2 °C. When the plate is heated to 191 °C, by what fraction (r-ro)/ro will the radius of the hole change?

    asked by Micah on February 14, 2017
  94. chemistry

    what quantity of heat is rewuired to raise the temperature of 15g of iron from 0 degrees celsius to 100 degrees celsius?

    asked by lola on October 10, 2011
  95. Chemistry

    During a reaction, you see that the heat (q) given off is 4.6 cal calories. Knowing that you used a mass of 100 g and that the temperature change was 7.85°C, what is the specific heat of this reaction?

    asked by Tori on October 10, 2011
  96. chemistry

    What is the specific heat of a metal if 24.8 g absorbs 65.7 cal of energy and the temperature rises from 20.2 degrees celsius to 24.5 degrees celsius?

    asked by jenn on September 4, 2012
  97. Chemistry 2

    An aqueous solution has a vapor pressure of 81.1 at 50 . The vapor pressure of pure water at this temperature is 92.6. What is the concentration of in mass percent?

    asked by Jesse on January 27, 2011
  98. Chemistry

    During a reaction, you see that the heat (q) given off is 4.6 cal calories. Knowing that you used a mass of 100 g and that the temperature change was 7.85°C, what is the specific heat of this reaction?

    asked by Tori on October 10, 2011
  99. Physics

    How many calories will it take to raise the temperature of a 41 g gold chain from 20°C to 100°C? The answer is 102 calories. I've tried everything and can't come up with that answer. Does someone have any idea what was used for a formula? Thanks

    asked by John on July 6, 2016
  100. Chemistry honors

    A 500 g piece of iron changes 7°C when heat is added. How much heat energy produced this change in temperature? C of iron is 0.450 J/g°C

    asked by Anonymous on December 9, 2018