1. chemistry

    Ni+4CO=NI(CO)4 this reaction separates nickel from other solid impurities.Starting with 86.4g NI,calculte the pressure of NI(CO)4 in a container of volume 4.00L

    asked by silly on November 28, 2010
  2. 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
  3. PHYSICAL SCIENCE

    What is happening with parameters(pressure, volume, and temperature)of an air bubble released by a frog at the bottom of a lake and explain why?

    asked by ASHLEY on October 5, 2010
  4. chem

    an average airbag contains 132 g of NaN3. How many liters of nitrogen would produce on a warm day at 85 degrees F and a pressure of 1atm?

    asked by tracy on April 26, 2011
  5. Chemistry 2

    How many cans ( each containing 14.0 oz of propane) would be required to convert 41.7 lbs of ice at -15.0 C to water at 100 C ( the boiling point at standard pressure)

    asked by Will on February 2, 2012
  6. Chemistry

    Consider the following equilibrium at 395K: NH4HS(s) NH3(g) + H2S(g) The partial pressure of each gas is 0.265 atm. Calculate Kc for the reaction

    asked by Cami on January 4, 2013
  7. Chemistry

    A 1.56L sample of Neon gas at STP is heated to 100C, what is the final pressure assuming the volume stays the same?

    asked by Terrie on April 25, 2011
  8. chemistry

    Ni+4CO=NI(CO)4 this reaction separates nickel from other solid impurities.Starting with 86.4g NI,calculte the pressure of NI(CO)4 in a container of volume 4.00L

    asked by silly on November 28, 2010
  9. physics

    Calculate the gauge pressure inside a soap bubble 0.0002m in radius using the surface tension for soapy water

    asked by Boyd on March 15, 2015
  10. BIOLOGY

    how would i find the osmotic pressure of something from "0.9% NaCl solution and MW is 58 grams" .. ? is there a formula or some sort i am missing? if so can you tell me what that is cause i have several problems like these that i don't know how to solve

    asked by Amber on April 8, 2014
  11. Science

    Meteorologist notice a low pressure Area developing over warm ocean water which type of storm is likely to form

    asked by Anonymous on February 15, 2018
  12. 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
  13. physics

    A 1200kg car has its tyres inlated to a gauge pressure of 180kpa.How large an area for each tyre is in contact with the ground

    asked by ceasar on December 1, 2011
  14. Physics

    The deepest point in the ocean is 11km below sea level, deeper than Mt. Everest is tall.What is the pressure in atmospheres at this depth?

    asked by NS on November 13, 2009
  15. Chemistry/Physics

    When 1mol of a gas burns at constant pressure, it produces 2430J of heat and does 5kJ of work. Calculate change in H, q, and in kJ?

    asked by Vanessa Ozuna on November 20, 2014
  16. Physics

    What is the difference in blood pressure (mm−Hg) between the top of the head and bottom of the feet of a 1.82m tall person standing vertically?

    asked by Anonymous on February 15, 2015
  17. history

    it was economist david ricardo who said that because of the pressure of population growth, wages would be just high enough to keep workers from starving; this was called the ________.

    asked by Victoria on May 6, 2014
  18. chemistry

    Calculate the percent deviation from ideal behavior for 0.85 mol of CO2 gas in a 1.20 L container at 45.0°C, which exerts a pressure of 19.2 atm.

    asked by Tamika on November 5, 2014
  19. physics

    Most sphygmomanometers use mercury. How tall would the manometer tube need to be if it were filled with water instead? It might need to measure a blood pressure as high as 300 mm Hg.

    asked by Jamie on November 9, 2010
  20. Physics

    If a tank is standing up i.e 1.200 dia x 1.100 high with 650 kg inside, How much water pressure to lift it Cheers

    asked by Spencer on July 28, 2011
  21. physical science

    Boyle’s law states that if you squeeze a fixed amount of a gas into a smaller volume, the pressure will increase. Explain why?

    asked by alex on March 4, 2013
  22. Physics

    The deepest point in the ocean is 11km below sea level, deeper than Mt. Everest is tall.What is the pressure in atmospheres at this depth?

    asked by SB on November 12, 2009
  23. chemistry

    3.58 gram sample of an unknown gas is found to occupy a volume of 2.37 L at a pressure of 808 mm Hg and a temperature of 60 oC. What is the molecular weight?

    asked by Anonymous on April 3, 2015
  24. Biology

    how would i find the osmotic pressure of something from "0.9% NaCl solution and MW is 58 grams" .. ? is there a formula or some sort i am missing? if so can you tell me what that is cause i have several problems like these that i don't know how to solve

    asked by Amber on April 8, 2014
  25. 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
  26. science

    A 1,200kg car has its tyres inflated to a gauge pressure of 180kPa.How large an area for each tyre is in contact with the ground?

    asked by haggai on November 30, 2011
  27. chemistry

    what pressure, in atmosphere, is exerted by 0.52 mol of water vapor at its boiling point of 100 degrees celcius in a 3L teakettle?

    asked by Terri on April 1, 2012
  28. 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
  29. 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
  30. Physics

    (a) How high a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 96.0 km/h? (b) If, in actuality, a 750 kg car with an initial speed of 96.0 km/h is observed to coast up a hill to a height 18.0 m above its

    asked by Devin on October 17, 2014
  31. Math

    Belmont Records produces DVD records. The fixed costs for producing a record are $160,000, and unit cost amount to 85 cents per record. The revenue is $5 per DVD. (a) How many DVDs must be sold in order to break even? (b) Find the profit or loss if 20,000

    asked by Matt on March 17, 2013
  32. chemistry

    A flask containing 200 mL of solution is labeled 0.300 M CuBr2. A sample containing 0.0500 moles of Br− is added to the solution. What is the molarity of the Br− ion solution? Assume no volume change. a) 0.850 M b) 0.667 M c) 1.10 M d) 1.00 M e) 0.400

    asked by bilawal on January 11, 2016
  33. Chemistry

    If one gram of sodium bicrbonate made it into your stomach from 1 teaspoon of baking soda, how many moles of acid could it neutralize? mols NaHCO3 = grams/molar mass. mols HCl=mols HCO3%-

    asked by Bob on February 20, 2007
  34. Chemistry

    How many moles of lithium carbonate are contained in 400 mL of a lithium carbonate solution with a concentration of 0.015 mol L-1? Give your answer as two sig. figures, followed by a space and the units

    asked by Kareena Kapoor on June 13, 2012
  35. Chimestry

    (The reaction of calcium hydride and water produces calcium hydroxide and hydrogen as products). How many moles of H_2(g) will be formed in the reaction between 0.90mol CaH_2(s) and 1.33mol H_2O(l)?

    asked by Inni on September 11, 2012
  36. chemistry/science

    2HCl + Mg = H2 + MgCl2 We are given 0.10 grams of Mg The concentration of Mg = 24g/mol Using avogadro's law (V=n/c; v-volume(L), n-number of moles(mol), c-concentration(g/L)) we have to predict the amount of HCl needed. help !

    asked by Lucia on September 24, 2008
  37. Chemistry

    10. When a 5.00 mL sample of vinegar is titrated, 44.5 mLof 0.100 M NaOH solution is required to reach the end point. What is the concentration of vinegar in moles per liter of solution (molarity, M)?

    asked by Anonymous on November 25, 2012
  38. Chemistry

    500ml of 0.250M Na2SO4 solution is added to an aqueous solution of 15.00 g of BaCl2 resulting in the formation of white precipitate of BaSO4. How many moles and how many grams of BaSO4 are formed?

    asked by Natasha on August 9, 2012
  39. Chemistry 2 Ap

    Can someone please help me ? What mass of glycerol must be dissolved in 200.0 g of water to give a solution with a freezing point of -1.50? im not sure how to even start this problem. I think i would find the moles in water first, then the grams in

    asked by jecce. on February 10, 2009
  40. Chemistry

    What is the formula of a substance that contains 0.0920 g of C and 0.0180 g of H? This is what I did... Find how many moles of each... .00766 mol C .01786 mol H Then I think I am supposed to divide each by the lowest number.. But I am not coming out with

    asked by Morgan on September 7, 2010
  41. Chemistry

    What how can I calculate the amount in moles and the mass in grams of KOH needed to convert 1.50 g of aluminum to KAl(OH)4. Balanced equation = 2 Al (s) + 2 KOH (aq) + 6 H2O (l)->2 KAl(OH)4 (aq) + 3 H2 (g) Please show steps ..

    asked by Cynthia on February 29, 2012
  42. chemistry

    .0815 moles NO are reacted with .0789moles O2 gas to form NO2 gas according to the following equation: 2NO +O2=2NO2 determine the molar amounts of NO, O2 and NO2 after complete reaction.

    asked by Missy on September 14, 2010
  43. Chemistry

    using the balanced reaction equation for the combustion of propane, determine the number ofmoles of oxygen that would react with.50 mol propane and the number of moles of carbon dioxide that would be produced?

    asked by Blake on January 9, 2011
  44. chemistry URGENT!

    each tablespoon of the liquid contains 95mg of aluminum hydroxide and 412mg of magnesium carbonate.how many moles of hydronium ion can be neutralized by one tablespoon of it?al(oh)3 =78g/mol ;mgCo3 =84.3 g/mol

    asked by thanksalot on March 7, 2011
  45. chemistry

    How many moles of magnesium chloride are formed when 55 mL of 0.70 M HCl is added to 42 mL of 1.204 g Mg(OH)2? Mg(OH)2(s) + 2HCl(aq) MgCl2(aq) + 2H2O(l) A. 0.019 mol B. 0.012 mol C. 0.021 mol D. 0.039 mol

    asked by Morgan on October 13, 2014
  46. Chemistry

    Given the amount of limiting regeant that you started with, how many moles of solid product did you expect to produce? Started with 1.12g of iron LR - iron Equation is 2Fe + CuSo4 -> Fe2So4 + Cu

    asked by Worm on April 20, 2016
  47. chemistry

    .0815 moles NO are reacted with .0789moles O2 gas to form NO2 gas according to the following equation: 2NO +O2=2NO2 determine the molar amounts of NO, O2 and NO2 after complete reaction.

    asked by Missy on September 14, 2010
  48. chemistry

    For each of the following unbalanced equations, indicate how many moles of the first product are produced if 0.625 mol of the second product forms. State clearly the mole ratio used for each conversion. CH3CH2OH(l) + O2 --> CH3CHO(aq) + CH3CHO(aq) + H2O(l)

    asked by Tanya on January 9, 2010
  49. Chemistry

    how many moles of O2 would be needed to produce 1120.5 kJ of heat from the reaction: 3Fe + 2O2 yields Fe3O4+ 1120.5 kJ I got 627771.33 which I thought seemed a bit too high. My proportion was 1120.5=2 O2/1120.5. Thanks again.

    asked by Tabetha on May 19, 2009
  50. Chemistry

    How many moles of solid Mg(OH)2 should you add to 200mL of 0.15M lactic acid solution to produce pH 4.0 buffer? -I don't know how to do this w/0 knowing pKa, but I don't think the point is to look up pKa. Is there some other way to solve this?

    asked by Me on October 14, 2014
  51. chemistry

    the molar mass of a newly synthesized jluorocarbon was measured in a gas microbalance, This device consists of a gkass bulb forming one end of a beam, the whole surrouned by a closed container. The beam is pivoted and the balance point is attained by

    asked by jack on October 6, 2010
  52. Psychology

    What would a Stress Reduction Specialist do to reduce the stress for the staff considering these following conditions: there are ten men and ten women of various ages and cultural backgrounds. The office is a medical office with doctors of various

    asked by anonymous on July 16, 2018
  53. Algebra

    The equation y=-1777x+27,153 can be used to predict the number of gun deaths in the US x years after 2000, that is x=0 corresponds to 2000, x=3 corresponds to 2003, x=6 corresponds to 2006. and so on. Predict the number of gun deaths in 2006 and 2007. Then

    asked by Eleana on February 19, 2010
  54. Chemistry

    Using the balanced equation of: HCl+NaOH-->H20+NaCl, how many moles of HCl could be neutralized with 13.2 mL of 3.00 M NaOH?

    asked by Alicia on February 26, 2013
  55. chemistry

    AgNO3+NaCL=NaNo3+AgCl heat change=-36 heat of percipitation of 2 moles of AgCl???

    asked by habiba on April 8, 2012
  56. chemistry

    if 25 moles of sodium phosphate are reacted with potassium hydroxide, how many grams of potassium phosphate will form?

    asked by carlene on May 6, 2011
  57. chemistry

    Determine the number of moles of N atoms in a sample of C7H5(NO2)3 that has the same number of O atoms as 12.6g C6H12O6

    asked by tomi on September 20, 2008
  58. Chemistry

    If i have 0.5 mole of hydrogen peroxide how many moles of oxygen would be produced assuming all of the hydrogen peroxide decomposes?

    asked by Kayla on May 1, 2016
  59. Chemistry

    Given the balanced equation: H2 + Cl2 2 HCl , how many moles of HCl will be produced if 18.4 g H2 reacts with 127 g Cl2?

    asked by Faith on March 18, 2016
  60. college chemistry

    for my lab i used 2.0mL of NaOH solution and it doesnt have a density in (g/mL)... is there still a way to calculate the moles to it? unless there is a density to NaOH

    asked by Anonymous on March 19, 2013
  61. Chemistry

    NaOH+H2SO4-> H2o+Na2SO4? How many moles of NaOH required to neutralize 1 mole H2SO4?

    asked by Lee on April 12, 2012
  62. Chemistry help

    NaOH+H2SO4-> H2o+Na2SO4? How many moles of NaOH required to neutralize 1 mole H2SO4?

    asked by Lee************** on April 14, 2012
  63. chemistry

    A stock solution is prepared by adding 26 mL of 1.1 M K3PO4 to enough water to make 30 mL. How many moles of K+ are in 21 mL of the stock solution?

    asked by Ashley on November 4, 2010
  64. chem

    How many moles of water are produced when 1.05 g of oxygen gas reacts with 1.22 g of hydrogen gas to produce water?

    asked by megan on March 9, 2008
  65. chemistry

    How many moles of iron(II)sulfide are produced when 4.38g of Fe reacts with 2.88g of S to produce iron(II)sulfide?

    asked by megan on March 7, 2008
  66. chemistry

    Calculate the number of moles in 75.0 g of oxygen gas. A. 2.34 mol O2 B. 4.69 mol O2 C. 750 mol O2 D. 12.5 × 1023 mol O2 B

    asked by Cathy on November 11, 2012
  67. Chemistry ?

    How many moles are contained in a 4.67-L sample of gas at 30°C and 199 kPa? A. 1.7 mol B. 11.8 mol C. 0.37 mol D. 3.7 mol I guessed D, but I'm not sure.

    asked by Kaylee on August 15, 2013
  68. Chemistry

    Calculate the number of moles in 22.6 g C3H7OH 22.6g C3H7OH x 1 moL C3H7OH /60.11g C3H7OH = 0.375 molC3H7OH Am I right

    asked by Monique on September 30, 2011
  69. organic chem

    moles are in 1.30 mL of acetic anhydride given that the density of acetic anhydride is 1.08 g/mL and the molecular weight is 102 g/mol?

    asked by Anonymous on September 18, 2015
  70. Chemistry

    A chemical reaction produces 3.75 L of chlorine gas at STP. How many moles of chlorine are produced by the reaction?

    asked by Karina on August 24, 2017
  71. Chemistry

    How many moles of water are in 1.0g of water? (Give number only in space below to the correct number of significant figures)

    asked by Ashley on March 4, 2012
  72. Chemistry help

    given 2.01x10^23power molecules of carbon dioxide, how many moles of co2 do you have? How many grams of carbon dioxide would this be? I need help!!

    asked by Anonymous on February 25, 2015
  73. Chemistry

    If 0.274 moles of a substance weighs 62.5g, what is the molar mass of the substance? 62.5/0.274 = 228.1 Am I on the right track?

    asked by Izzie on October 25, 2011
  74. Chem 1252

    Calculate the heat in Joules when 24.48 moles of H2O(l) are cooled from 55.0 degrees Celsius to 25.5 degrees Celsius.

    asked by Anonymous on September 12, 2012
  75. Chemistry

    Given the balanced equation: H2 + Cl2 → 2 HCl , how many moles of HCl will be produced if 18.4 g H2 reacts with 127 g Cl2?

    asked by Harlee on March 30, 2017
  76. Chem

    A 1.0 mL sample of seawater is determined to contain 9.0×10-14 moles of dissolved gold. How many atoms of gold are in that volume of seawater?

    asked by Maddie on October 10, 2017
  77. chemistry/math

    5.0 moles of solid sodium chloride (NaCl) are used to prepare a 5.0 M NaCl solution. What is the volume of the solution?

    asked by Morgan on October 13, 2014
  78. Chemistry

    Is there a chemistry teacher for jiskha? Or someone that knows what my teacher is talking about? :’( He wants me to: Calculate the number of moles of CO2 in 63.0g of CO2

    asked by Samantha on November 20, 2017
  79. chemistry

    A sample containing .187 g cl is dissolved in 50.0 mL water. How many moles of cl ion are in the solution? what is the molarity of the cl ion in the solution?

    asked by kristen on March 1, 2011
  80. Chemistry

    If i have 0.5 mole of hydrogen peroxide how many moles of oxygen would be produced assuming all of the hydrogen peroxide decomposes?

    asked by Kayla on April 30, 2016
  81. Chemistry

    on heating the hydrate CaSO4*2H2O, how many moles of water should be driven off per mole of hydrate? 1 mole?

    asked by c on November 8, 2009
  82. Physics

    A wheel is rolling ithout slipping at 487 meters per second to the right on a level surface. the diameter of the wheel is 100 centimeters. What is the angular speed of the wheel in revolutions per minute? Please walk me through your steps, don't just

    asked by Jen on June 11, 2012
  83. physics

    The driver of a car sets the cruise control and ties the steering wheel so that the car travels at a uniform speed of 14m/s in a circle with a diameter of 100m . Part A Through what angular distance does the car move in 4.00min ?

    asked by becca on November 5, 2013
  84. REALLY HARD CALCULUS PROBLEMMMM PLEASE HELP ME???

    A circular swimming pool has a diameter of 16 m, the sides are 3 m high, and the depth of the water is 2.5 m. How much work (in Joules) is required to pump all of the water over the side? (The acceleration due to gravity is 9.8 m/s 2 and the density of

    asked by Sarah with an 'H' on October 15, 2014
  85. math

    juile is making a nacklace out of red, green, and white beads. she strings the beads in order shown above and and continues the pattern. each bead is 1/4 inch in diameter. how many beads of each color will she need to make a necklace 24 inches long?

    asked by anonymous on November 29, 2007
  86. Physics

    Starting from rest, a 2500 kg helicopter accelerates straight up at a constant 1.7 m/s2. What is the helicopter's height at the moment its blades are providing an upward force of 29 kN? The helicopter can be modeled as a 2.6-m-diameter sphere. How do you

    asked by Brittany on August 24, 2016
  87. Chemistry

    Sally Scientist is trying to determine Avogadro's number using a procedure analogous to that in Experiment 4. She fills a watchglass with diameter 11.9 cm with water and is trying to create a monolayer of stearic acid on the top of the water. What is the

    asked by Mindy on February 7, 2010
  88. Chemistry

    I posted this question a bit ago and received some help..but need more.. thanks Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452

    asked by Julia on April 12, 2007
  89. Chemistry

    When 80.0 mL of HCl is added to 80.0 mL of NH3OH, the temperature increases 2.5 celsius. Assuming the final solution has the same specific heat capacity as liquid water, the heat produced in the reaction between two solutions is: I don't know how to find

    asked by Wendy on February 22, 2015
  90. chem

    Calculate the number of grams of magnesium nitride necessary to produce 2.02 L of ammonia gas at STP. I got 4.55g for the upper question which is correct but idk how to do the bottom one: How many moles of magnesium hydroxide can also be formed? Mg3N2(s) +

    asked by rebekah on December 9, 2010
  91. Chemistry

    Fe + 2HCl = FeCl2 + H2 A piece of metallic iron (10 moles) was dissolved in concentrated hydrochloric acid. The reaction formed hydrogen gas and iron chloride. How many grams of HCl were consumed? Don't forget the units.

    asked by Liz on June 27, 2010
  92. Chemistry with Qualitative Analysis

    Help please with Carbon analysis. An air bubble accidentallyy enter the CO2-collection graduated cylinder after the completion of the reaction. How does this error affect the reported moles of CO2(g) collected--too high, too low, or unaffected? Explain.

    asked by EJ Nunez on November 1, 2012
  93. chemistry

    Hello, I was confused on this chemistry problem and I was wondering if someone could please help me. 1) Consider the following chemical reaction: 2CH3OH(I) + 3O2 (g) → 2CO2(g) + 4H2O(I) Calculate the number of moles of CO2 produced when 11.25 mL of

    asked by molly on February 19, 2017
  94. Chemistry

    How many moles of nitrate ions are present in 24.0mL of a 2.93M solution of potassium nitrate? I'm thinking this is some form of unit conversion problem I know that M= molarity which is mol/L how ever I am confused on how to set this up and input

    asked by Matthew on June 5, 2017
  95. Chemistry

    Calculate the mass of sodium chloride (NaCl) produced when 5.50 moles of solid sodium reacts in excess chlorine gas. (Hint: Start by writing a balanced chemical equation) Please help me understand HOW to solve this problem.

    asked by Ryan on May 27, 2009
  96. Chemistry (Stoichiometry)

    Potassium superoxide (KO2)reacts in the following equation: 4KO2 + 2H2O +4CO2 =4KHCO3 + 3O2 If a person wearing an oxygen mask exhales 0.85 grams of CO2 every minute, how many moles of KO2 are comsumed every 10.0 minutes?

    asked by Alexus on February 7, 2013
  97. Chemistry

    When 80.0 mL of HCl is added to 80.0 mL of NH3OH, the temperature increases 2.5 celsius. Assuming the final solution has the same specific heat capacity as liquid water, the heat produced in the reaction between two solutions is: I don't get how to find

    asked by Wendy on February 22, 2015
  98. Chemistry

    A piece of metallic iron (10 moles) was dissolved in concentrated hydrochloric acid. The reaction formed hydrogen gas and iron chloride. How many grams of HCl were consumed? Don't forget the units. Fe+2HCl---->FeCl2+H2

    asked by Meladee on August 5, 2010
  99. AP Chem

    At a particular temperature, Kp = 0.25 for the following reaction. N2O4(g) 2 NO2(g) (a) A flask containing only N2O4 at an initial pressure of 5.3 atm is allowed to reach equilibrium. Calculate the equilibrium partial pressures of the gases. (b) A flask

    asked by Bill on January 8, 2012
  100. Math

    A basketball player has a 40% shooting average from the free-throw line. If she takes two free throws, estimate the probability that she will make both of them. Use the following list of digits which was taken from a table of random numbers. Let the digits

    asked by Anthony on May 24, 2010