1. chemistry

    Assuming all gases are at the same temperature and pressure, how many milliliters of hydrogen gas must react to give 41.0 mL of NH3? 3H2(g)+N2(g)→2NH3(g)

    asked by Maria on July 20, 2016
  2. Pre Ap Chemistry

    A sample of carbon dioxide gas occupies 566 mL at 0.825 atm and 15 ◦C. What will the pressure be at a volume of 834 mL and a temperature of 20◦C

    asked by Analyse on March 29, 2015
  3. physics

    carbon dioxide forms into solid (dry ice)at approximately -150 F. What temperature in degree celsuis does this correspond to?

    asked by papi on December 5, 2012
  4. physics

    How many calories of heat must be added to 455 g of steel to raise its temperature from 20 °C to 192 °C? (Note: csteel = 0.115 cal./g. °C.)

    asked by help please asap on May 20, 2013
  5. Mathematics Ms Sue help

    How many calories of heat must be added to 455 g of steel to raise its temperature from 20 °C to 192 °C? (Note: csteel = 0.115 cal./g. °C.)

    asked by adam on May 20, 2013
  6. Physic

    Calculate the average speed of an oxygen molecule (with a mass of 5.3e-26 kg) at room temperature (300 Kelvin)show your work

    asked by Luis on July 22, 2012
  7. Science

    If the trend in the graph continues through the summer, what would you expect the average high temperature in Louisville, Kentucky , to be in August? Please respond as soon as you can, Thanks!

    asked by Mani on September 17, 2015
  8. chemistry

    2.85 sample of an unknown chlorofluorocarbon is decomposed and produces 558 of chlorine gas at a pressure of 756 and a temperature of 298 .

    asked by des on July 22, 2012
  9. Physics

    Find the volume occupied by 3.14 moles of an ideal gas at standard conditions of pressure and temperature (P = 1.00 atm, T = 273 K).

    asked by Dave on December 8, 2015
  10. physics

    When 1.60 multiplied by 105 J of heat enters a cherry pie initially at 20.0°C, its entropy increases by 470 J/K. What is its final temperature?

    asked by Justin on July 28, 2013
  11. chem

    The pressure on a gas at −43◦C is doubled, but its volume is held constant. What will the final temperature be in degrees Celsius? Answer in units of ◦C

    asked by reis on May 30, 2014
  12. P.E.

    A very active person uses a large amount of energy and therefore has a high A. temperature** B. cholesterol level C. fat diet D. metabolism

    asked by Raven on October 9, 2015
  13. Earth Science

    which of the following locations in New York State is most likely to have the smallest range in temperature? 1. Long Island 2. the Catskills 3. Albany 4. the Adirondack Mountains

    asked by Danny on May 27, 2011
  14. chemistry

    What is the activation energy for a reaction whose rate is tripled by a temperature increase from 28 to 53 C? I understand that I have to use the arrhenius equation, but how do I set it up for a problem like this?

    asked by Jeena on March 15, 2010
  15. Physics

    The condensing pressure is 260psig and the metering device inlet temperature is 100 degrees for R-22 what is the total subcooling in the system?

    asked by Danny on February 8, 2013
  16. physics

    Is the equation 344+0.6x(t-20)? I'm not getting this at all? How long does it take for sound to arrive at the back of a big auditorium if the temperature is 33 oC and the stage is 29 m away? answer in seconds

    asked by Joe on January 20, 2011
  17. Physical sci

    A copper rod is 22 mm long at room temperature (20c). What length does it expand to when placed in a 757 degrees Celsius furnace?

    asked by Millie on March 31, 2015
  18. Physics

    What will be the equilibrium temperature when a 245 g block of copper at 285 oC is placed in a 145 g aluminum calorimeter cup containing 825 g of water at 12.0 oC?

    asked by Eric on September 20, 2010
  19. math

    Changing Elevations :Location Alamosa, Colorado Sleeping bag rating+35 and the out side temperature is 60° will sleeper be warm?

    asked by Anonymous on August 29, 2012
  20. Sci

    A 5kg voulume of water falls from a shelf 2 meters above the floor, If all the energy is converted to heat, what is the change in temperature?

    asked by Trice on July 3, 2011
  21. physics

    When 1.60 multiplied by 105 J of heat enters a cherry pie initially at 20.0°C, its entropy increases by 470 J/K. What is its final temperature?

    asked by Justin on July 28, 2013
  22. physics

    A fighter jet is flying at Mach 3.2 in air of temperature 2 degrees C. What is the planes speed? I really don't understand how to do this question. I'd appreciate your help!

    asked by emily on May 15, 2017
  23. Science - Physics

    Some helium at 20.0psi gauge pressure occupies 40.0ft^3. find its volume at 32.4 psi if the temperature remains constant.

    asked by Sharon on April 11, 2012
  24. Biology

    Which is the independent variable in this experiment? A) Enzyme concentration B) Length of glass tubing C) Temperature D) Time Thank you for your help and God bless

    asked by Some one who needs help! on May 14, 2019
  25. science

    A detailed description on the environment the eagle live in:this should include the temperature,vegetation,source of water and climate changes in the habitat.

    asked by kina on July 12, 2013
  26. physics

    What will be the equilibrium temperature when a 273 g block of copper at 298°C is placed in a 132 g aluminum calorimeter cup containing 815 g of water at 11.4°C?

    asked by cassie on June 19, 2012
  27. enviromental chemistry

    If 10 ppm of nitrogen dioxide is present 1000 L of air at a pressure of 1 atm and temperature of 27 °C, what is the amount of ammonia necessary to react?

    asked by joe on February 4, 2017
  28. Chemistry

    At constant temperature and pressure, what is the maximum volume, in liters, of HNO3(g) that can be made from 10.39 L of NO2(g) and 15.53 L of H2O(g)? I don't even know how to start it...

    asked by Nihar on June 18, 2012
  29. Chemistry

    Diluting and dissolving of potassium nitrate is very endothermic.Suggest what would be observed to the temperature if 2.0g of the salt is added to 2cm3 of water.

    asked by Richaj on September 15, 2014
  30. Physics

    A body's temperature is increased from 900K to 1900K. By what factor does the total power radiated per unit area increase?

    asked by Paul on September 23, 2014
  31. Biology

    Your thermocycler is broken, and can only reach a temperature of 72 degrees Celsius maximum. What effect will this have on your PRC? Will you still get DNA replicated? Explain

    asked by Anonymous on October 21, 2013
  32. science

    To study a rock sample,geologists observe the rocks mineral,composition,color, and temperature. true or false ?

    asked by Victoria on January 7, 2014
  33. Chemistry

    Suppose a can of aerosol contains a residual amount of gas at pressure of 755mm Hg and a temperature of 25C. What would the presure be if the can were to be heated to 1155c?

    asked by Amee on March 4, 2013
  34. physical geography

    i need to know how the elements of the planets,ie... solids, liquids,gasses and factoring in gravity and temperature combine to dictate their position from the sun?

    asked by danielle on January 24, 2010
  35. science

    1.In which temperature of water did the food coloring diffuse faster? 2.Using your knowledge of the motion of molecules, explain the results. I need help on a discussion.

    asked by ny on January 25, 2019
  36. Chemistry

    For a certain reaction, the activation energy is 52.1 kJ/mole. By what ratio will the rate constant change if the temperature is decreased from 175C to 75C?

    asked by Whitney on February 18, 2015
  37. Chemistry

    A sample of iron with a mass of 75.66g and an initial temperature of 15.38C gains 10480 Joules. What is the final temperture?

    asked by Lewis on April 6, 2011
  38. Physics

    Temperature of a diatomic gas is 300k. If the moment of inertia of its molecules is 8.28*10^-38 gm-cm^2. Calculate their root mean square angular velocity.

    asked by birju on May 10, 2013
  39. chemistry

    If a volume of nitric oxide gas at 25.0°C increases from 2.00 L to 3.00 L, what is the final Celsius temperature? Assume pressure remains constant

    asked by Anonymous on December 8, 2010
  40. Organic Chemistry

    When 2-methyl-2-butene is bubbled into dilute sulfuric acid at room temperature, it appears to dissolve. what new substance has been formed?

    asked by Melissa on March 30, 2010
  41. science

    If the absolute temperature ooh 6 inches cubed of a gas decreases by a factor of 2, what will be the new volume? How do set up this problem and solve it?

    asked by Graham on November 18, 2014
  42. chemistry

    What is the specific heat of an unknown substance if a 2.31 g sample releases 12.5 cal as its temperature changes from 24.9°C to 20.7°C? Please explain ans show steps.

    asked by Julia on April 16, 2013
  43. Chemistry

    In a coffee cup calorimeter, 50.00 mL of HNO3 (aq) and 50.00 mL of KOH(aq) were mixed. The temperature of the resultant solution increased 6.5 C. What is the Delta H of this reaction?

    asked by Jaime on April 8, 2012
  44. Chem 101

    Using the "Unit conversion method", derive an equation to calculate the heat required to raise the calorimeter to the maximum temperature.

    asked by John on October 26, 2011
  45. chemistry

    If the diffusivity is observed to double when the temperature is increased by 10 degrees C, what is the activation energy for diffusion? Express your answer in units of eV.

    asked by Anonychem on January 12, 2013
  46. body organs

    the bodys ongoing process of regulating the internal enviroment electrolyte balance blood chenistry temperature and so on is called

    asked by robbie on May 16, 2010
  47. chemistry

    (b) If the diffusivity is observed to double when the temperature is increased by 10 degrees C, what is the activation energy for diffusion? Express your answer in units of eV.

    asked by hr on January 13, 2013
  48. Science

    humans,other mammals,birds can maintain a constant body temperature. why is this a useful adaptation? how does this explain the spread of these animals around earth?

    asked by esha on October 17, 2012
  49. Chemistry

    Which direct measurement would provide evidence that the energy of a substance had changed? A. temperature B. heat C. mass D. volume I think the answer is a or b

    asked by Morgan on November 6, 2014
  50. chemistry

    A sample of neon gas at 1.20 atm compresses from 0.250 L to 0.125 L. If the temperature is held constant, what is the final pressure?

    asked by Anonymous on October 30, 2014
  51. physics

    If a burning log is a black object with a surface area of 0.35 m2 and a temperature of 800 ˚C, how much power does it emit as thermal radiation?

    asked by ann on April 12, 2011
  52. O chem

    When 2-methyl-2-butene is bubbled into dilute sulfuric acid at room temperature, it appears to dissolve. What new substance has been formed?

    asked by coral on January 6, 2010
  53. chemistry

    At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer

    asked by amber on October 17, 2010
  54. chemistry

    At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer

    asked by Amber on October 17, 2010
  55. chemistry

    Determine the final temperature of a 10 gram aluminum block originally at 25.0 degrees Celsius if you apply 435 J of energy to it.

    asked by Jenifer on December 7, 2015
  56. bioelectricity

    At a temperature of 10∘C, the concentrations of ions are: IonIntracellularExtracellular Na61485 K28010 Cl51485 The transmembrane potential is -30 mV. How many ion species (Na, K, or Cl) are NOT in equilibrium?

    asked by B on February 19, 2013
  57. Math (written answer)

    IDK HOW TO SOLVE THIS WRITTEN ANSWER PROBLEM, PLEASE HELP! write an inequality to represent a situation the temperature stayed above -15 degrees

    asked by Tana on May 2, 2017
  58. chemistry, physics

    In the specific heat measurement does the sample have to be 100 C, or would a lower initial temperature do just aa well? I wrote down it doesn't matter, but i don't know why.

    asked by miyabi on December 16, 2015
  59. Physics

    A body's temperature is increased from 900K to 1900K. By what factor does the total power radiated per unit area increase?

    asked by Paul on September 23, 2014
  60. MAth Help

    The function f(t)=22sin(piT/3 -5)+80 is used to represent the changes in temperature of a chemical compound used in a lab. What is the vertical shift? I got the answer of 6. Is this correct?

    asked by Anonymous on November 21, 2014
  61. physics

    one mole of an ideal gas expanded isothermally and reversibly at temperature of 300k from 10 to 1 atmospheric (atm). Calculate the work.

    asked by SIMARKUS on September 5, 2018
  62. Chemistry

    At 60 celsius the value of Kw is 9.5x10^-14. considering this waht is the calculated value for the pOH of a 2.00x10^-3 M HCL solution at this temperature? the answer is 10.32 i do the -log and i get 11.31 please advice

    asked by HELPP on October 26, 2011
  63. Chemistry

    A 6.3 g sample of solid NH4NO3 is dissolved in 50g of water, causing the temperature to drop from 24°C to 19°C. Calculate the ∆Hsolution in J/mol. -Thank you ☺

    asked by Gennelle on March 12, 2017
  64. physics

    Explain why it would not make sense to use a full-size glass thermometer to measure the temperature of a thimbleful of hot water?

    asked by joshen on June 19, 2013
  65. science

    What physical property is changed when a waitress pours coffee from a pot into four mugs? density color volume temperature

    asked by lydia on August 17, 2017
  66. biology

    How many Calories are found in a food sample if burned in a calorimeter is raises the temperature of 1000 grams of water 58 degrees?

    asked by Anonymous on April 27, 2010
  67. chemistry

    when 2.76 (0.0200 mol) of k2co3 was mixed with 30.0 ml of approximately 2 M HCL the temperature rose by 5.2 C how do i write a balanced equation for problems like this?

    asked by cindy on February 18, 2010
  68. physics

    A stone is thrown downward into a well with an initial speed of 5.00 m/s. The sound of splash is heard 1.50 s later. Find the depth of the well if the air temperature is 15.0 ˚C?

    asked by Elisa on August 6, 2008
  69. chemistry

    A gaseous mixture at a constant temperature contains O2, CO2 and He. List the three gases in order of increasing average molecular speed. THANKS.

    asked by Yoda on January 4, 2011
  70. chemistry

    at a certain temperature 800 mole of so3 is placed in a 4.00-l container. 2SO3(g)2SO2(g)+O2(g) at equilibrium, 0.120 mol of o2 is present. calculate kc

    asked by Anonymous on March 1, 2014
  71. Chem

    I need help setting this up, please. What is the specific heat of a substance if 1560 cal are required to raise the temperature of a 312–g sample by 15ºC

    asked by Kay on May 27, 2009
  72. Physics

    3000 Joules of energy in the form of heat are added to a copper block with a mass of 1 kg. What is the blocks temperature change?

    asked by Heidi on April 24, 2010
  73. 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?

    asked by gina on October 14, 2014
  74. Physical science

    a mass of 10g of sodium nitrate is dissolved in 10ml of water at 80 degrees celsius, at what temperature will it start to precipitate?

    asked by Abraham on January 6, 2015
  75. Chemistry

    The rate constant fo a particular reaction increases by a factor of 6.5 when the temperature is increased from 300.0K to 310.0K. Calculate the activation energy.

    asked by Anonymous on December 25, 2010
  76. chemistry

    A sample of neon gas at 1.20 atm compresses from 0.250 L to 0.125 L. If the temperature remains constant, what is the final pressure?

    asked by Mallory on November 14, 2011
  77. science

    What is the phase of neon at room temperature? This will give you all the information you ever wanted about Ne. Click on element #10 http://www.webelements.com/

    asked by T on January 30, 2007
  78. Clinical Procedures

    Which one of the following elements is necessary for a bacterial micoorganism to grow? A. Light B. Acid environment C. Body Temperature D. Carbon dioxide I chose C

    asked by Joan B. on July 29, 2011
  79. Chemistry

    Calculate the heat capacity of a calorimeter if th ecombustion of 4.665 g of benzoic acid led to an increase in temperature of 7.148 C.

    asked by jim on October 11, 2012
  80. science(please help)

    Which of the following has the greatest effect on the formation of rain or snow? A)cloud cover C)air pressure B)humidity D)temperature My answer is C) am i right, if not please tell me what you got.

    asked by May on October 30, 2012
  81. science

    Which of the following has the greatest effect on the formation of rain or snow? A)cloud cover C)air pressure B)humidity D)temperature My answer is C) am i right, if not please tell me what you got.

    asked by lidia on October 30, 2012
  82. chem 101

    Calculate the amount of heat required to raise the temperature of a 25 g sample of water from 9 ∘C to 30 ∘C. Express your answer using two significant figures.

    asked by soso on January 27, 2016
  83. Science

    List at least three atmospheric properties that might change as you traveled from the Earth's surface to space. Temperature, gases, air pollutants?

    asked by Anonymous on February 5, 2016
  84. Chemistry!!!

    Calculate the density of a certain gas if its pressure is 0.725 atm, its molar mass is 48.22 g/mol, and the temperature of the has is 24.0 degrees Celsius

    asked by Amanda on May 3, 2011
  85. physics

    a monatomic gas initially at 19 degree celsius is suddenly compressed to 1/10th its original volume .what is temperature after compression?

    asked by zainab on June 29, 2013
  86. Physics

    Carbon dioxide forms into a solid (dry ice) at approximately -157°F. What temperature in degrees Celsius does this correspond to?

    asked by Jesse on December 19, 2010
  87. Chemistry

    What mass of liquid water at room temperature (25◦C) can be raised to its boiling point with the addition of 43.0 kJ of energy? Answer in units of g.

    asked by Nicole on October 24, 2015
  88. physics

    1 A steel wire, 150 m long at 10¢XC, has a coefficient of linear expansion of 11 „e 10ƒ{6/C¢X. Give its change in length as the temperature changes from 10„aC to 45„aC. 5.8 cm

    asked by b on July 28, 2011
  89. astronomy

    What is theratio of the luminosity per aquare meter coming from a part of the Sun that is 5800 K versus a sunspot where the temperature is 5000 K?

    asked by Linda on March 5, 2012
  90. biology

    The regulation of temperature in the body is a good example of a... A-hormone-receptor complex B-prostaqglandin C-feedback mechanism D-exocrine gland

    asked by Taylor on April 18, 2010
  91. physics

    If a burning log is a black object with a surface area of 0.35 m2 and a temperature of 800 ¢ªC, how much power does it emit as thermal radiation?

    asked by olga on April 21, 2011
  92. physics

    When 1.60 multiplied by 105 J of heat enters a cherry pie initially at 20.0°C, its entropy increases by 470 J/K. What is its final temperature (C)?

    asked by Justin on July 28, 2013
  93. Bio

    16. Name some biological processes that are affected by temperature. Cellular Respiration Homeostasis Enzyme Activity Heart Rate Can anyone please suggest more?

    asked by Anonymous on November 11, 2007
  94. Chem

    Calculate the heat capacity of a calorimeter if th ecombustion of 4.665 g of benzoic acid led to an increase in temperature of 7.148 C

    asked by Dave on October 11, 2012
  95. Chemistry

    Could I please have an example of a everday experience of a chemical process for which a rate increases with temperature? I thought of ice melting but its a physical change...

    asked by Matt on February 19, 2008
  96. Chemistry

    Give the physical state of CO2 under the following conditions: pressure = 4000 mmHg, temperature = 18 degrees F. show work!

    asked by Sarah on September 6, 2011
  97. Environment.. again

    I'm stumped with another question too. Can petroleum fractions be separated at room temperature on the basis of their viscosities? I would guess that they could but i don't know how to explain it

    asked by Katy on March 24, 2008
  98. physics

    When 1.60 multiplied by 105 J of heat enters a cherry pie initially at 20.0°C, its entropy increases by 470 J/K. What is its final temperature (C)?

    asked by Justin on July 25, 2013
  99. ap chemistry

    To what temperature must a sample of helium gas be cooled from 123C to reduce its volume from 3.7 L to 0.27 L at constant pressure? Answer in units of K

    asked by cheri on February 9, 2013
  100. Chemistry

    I have to calculate the heat capacity of a coffee cup calorimeter, but I'm not sure how. I have NaCl and NaOH, they both start at the same temperature, and I have the mass of the solutions used. I'd appreciate the help!

    asked by Dan on February 8, 2016