1. Chimstery

    What mass of CO is required to react with 146 g of iron (|||) oxide?
  2. Careers

    What are registered nurses required to do? Everyone is saying it is intense labour work. Thanks :)
  3. Biology

    Why are simple sugars required for metabolism? What makes them so important?
  4. chemistry

    How many mL of 0.0500 M EDTA are required to react with 54.0 mL of 0.0190 M Ca2+?
  5. Chemistry

    What mass of KBr is required to prepare 8.oo L of .400 M solution?
  6. Chem!!!:/

    Calculate the ratio of NaF to HF required to creAte a buffer with pH=4.00.
  7. Chemistry Help!!

    How many joules of heat are required to melt 60.5g of ice at 0 degrees C?
  8. Chemistry

    What volume of O2 at 912mmHg and 33 degrees C is required to synthesize 11.0 mol of NO?
  9. science

    A 250 kg object is acceelerating at 2.8 m/s2. What force was required to achieve this?
  10. science

    how many joules are required to evaporate 1 gram of boiling water?
  11. chemisrty

    how many ml of a .1M HCl are required to react completely with 1 gm mixture of Na2CO3 ?
  12. Ap Chemistry

    HOw much energy is required to ionize a mole of Hydrogen atoms?
  13. chemistry

    What volume of 9.0Molarity of H2SO4 is required to react with 20.0g of NaOH?
  14. chemistry

    Calculate the current in ampheres required to produce 15.0g in 2 hrs.
  15. Chemistry

    What mass of protons would be required to just neutralize the charge of 1.5 g of electrons?
  16. sonogram physics

    How much time is required to image a structure at 5cm.?
  17. Chemistry

    What is the mass of glucose required to prepare 500ml of 1M solution
  18. physics

    What emf is required to cause 12 amperes to flow through a resistance of 7.2 ohms?
  19. Science

    The t1/2 for a first order rxn is 20 s.the time required for 99.9 percent decomposition is
  20. Chemistry

    how much limestone would be required to change the ph value from 4 to 4.5 in 20000 cubic of water?
  21. physics#30

    Why dosen't a transformer work with direct current? why is ac required?
  22. Chemistry

    How many moles of LiF would be required to produce a 12.0 M solution with a volume of 10.5 L?
  23. Chemistry

    how many moles of chlorine gas are required to react with 164 g of Br
  24. physics

    How much time is required for sound to travel 1.4 km through air if the temperature is 30.0 c
  25. chemistry

    How many grams of potassium iodide, KI, are required to make 2.0 L of a 0.1M solution?
  26. Chemistry

    How many photons with a wavelength of 450 nm is required to have mass of 1.25 micrograms?
  27. Chemistry

    How many grams of MgCl2 would be required to make 440 g of magnesium ?
  28. Chemistry

    How many g of CaCl2 are required to prepare 0.250 L of a 0.200 M solution?
  29. Math

    Required to Prove the following trig identity: (cos2x)^2 + (sin2x)^2 = 1
  30. science

    How much work is required to lift a 3.7-kg concrete block to a height of 2.7 m?
  31. chemistry

    how many ml of 0.15 NaOH solution are required to neutralize 35.00 ml of 0.22 moles of HCL
  32. Anal chem

    how much 0.1F HC2H3O2 is required to make 500 ml of solution with a Ph of 4.0?
  33. chemistry

    how much ml of concentrated hci required to make 0.5N hcl solution? /
  34. Chemistry

    What mass (g) of KHP is required to neutralize 10.00 mL of 0.1092 M NaOH?
  35. physics

    How many joules of energy are required to melt 80g of silver.
  36. physics

    What voltage is required to store 6.90 10-5 C of charge on the plates of a 7.00-µF capacitor?
  37. phys

    How many kcal of heat are required to vaporize 25.0 kg of water at 100C?
  38. Chemistry

    Help? How many moles of LiF would be required to produce a 2.5 M solution with a volume of 10.5 L?
  39. physics

    how many RPM are required to attain 1g with a radius of 840 feet
  40. Chemistry

    How many moles of electrons are required to produce 23.8 g Cu from a CuSO4 solution?
  41. english

    how can i fix this sentence? “A glove and ball is the required gear.”
  42. chemistry

    What mass of H2SO4 would be required to react with 0.59 mol of NaOH?
  43. chemistry

    how much energy in joules is required to melt 10.00 moles of ice
  44. Physics

    How much force is required to accelerate 7.0 g object at 11000 "g's" in a centrifuge?
  45. physics science

    if you wish to warm 95 kg of water by 20.0c for your bath how much heat is required
  46. Physics

    How much work is required to lift a 10 kg object above your head (approximately 1.3 m)?
  47. Physics

    How much energy is required to ionize hydrogen when it is in the state with n = 6? (answer in eV)
  48. Chemistry

    What weight of NaOH would be required to prepare 3000ml of a 2.5M solution?
  49. science

    How much work is required to lift a 3.3-kg concrete block to a height of 1.2 m?
  50. chemistry

    What mass of electrons would be required to just neutralize the charge of 1.4 of protons?
  51. physics

    How much work is required to lift a 5.2-kg concrete block to a height of 3.1 m?
  52. chemistry

    What volume in mL of a 1.06 M NaOH solution is required to neutralize 12 g of HCl?
  53. math

    The least number of pens required to make complete sets of 20, 24, 30, are?
  54. science

    how many grams of nacl are required to completely neutralize of 1 M of h2so4
  55. science

    How many moles of li2so4 is required to prepare 300ml of a 0.5 m solution
  56. Chemistry

    How many milliliters of 2.00 M HCl(aq) are required to react with 7.55 g of an ore containing 36.0% Zn(s) by mass?
  57. phy

    How much heat is required to raise the body temperature of a 60.0-kg woman from 37.0° C to 38.2° C?
  58. Life science

    Name any 3 mineral elements that are required for the formation of membremes.
  59. Chemistry

    What amount of heat is required to raise the temperature of 10.0 g of aluminum by 15.0 C
  60. Chemistry

    What amount of heat is required to raise the temperature of 10.0 g of aluminum by 15.0 C
  61. physics

    how many Btu of heat are required to melt 8.35 lb of ice at 32 degrees F
  62. Science

    How many ml of .150 M Na2CrO4 will be required to oxidise 40 ml of .05M Na2S2O3
  63. chemistry

    What mass of protons would be required to just neutralize the charge of 2.7 g of electrons?
  64. physics

    What is the minimum speed required to simulate artificial gravity?
  65. chemistry

    For neutralization of 10ml 10% sodium carbonate how many 1N H2SO4 is required?
  66. chemistry

    How many grams of SrCl2 is required to prepare 1 molar solution of it,
  67. confidentiality allied health

    a hospital is required to query the NPDB when
  68. Chemistry

    What mass of KOH is required to neutralize 200mL of 3.16 M HNO3?
  69. physics

    How many seconds is required to stop a vehicle travelling 55.9 km/h if it decelerates at 8.2 m/s/s?
  70. Chemistry

    How many mL of 0.1 N NaOH are required to react with 100 mEq of H2SO4?
  71. Calculus

    How many terms are required in the series (-6) + (-12) + (-24)... to add to a sum of -378? How do I do this?
  72. Math

    How would you solve 4m(-2mn^2)^3/4m^-6n4. In addition, what steeps are required
  73. Chemistry

    How many grams of NaCL are required to make 250ml of a 0.4M solution?
  74. Chem

    Assume low fat milk is 2.36 % buttermilk by volume. If you drink 3 L of milk, how many liters of butterfat have you drunk? =.0708 L Given that the density of the buttermilk is measured to be 0.79 g/mL and you have not drunk anymore milk, how many grams of
  75. algebra

    Assume a 125 pound person burns 150 calories after 15 minutes of jogging and 200 calories after 20 minutes of jogging. Part 1: Write an equation to represent this data. Use calories as the y-coordinate and minutes as the x-coordinate. Part 2: What is the
  76. physics

    A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is rotating at 7 rev/s. 55 revolutions later, its angular speed is 21 rev/s. (a) Calculate the angular acceleration. (b) Calculate
  77. chemistry

    A piece of magnesium weighing 48 grams is burned in air n 80 gram of magnesium oxide is formed. what mass of oxygen combined with the magnesium is in the reaction?
  78. chemistry

    A 3.00 Liter tank containing 225 grams of oxygen gas was heated to 100 degrees C. How much pressure must the tank be able to withstand to avoid explosion of the tank?
  79. Chemistry-Equation

    When iron rusts in air, iron(III) oxide is produced. How many moles of oxygen react with 2.4 mol of iron in the rusting reaction?
  80. body system

    7.)During the exchange of air in your lungs, your body seeks to keep oxygen and release ____________which will then exit your body A.)Microorganisms B.)Carbon Dioxide C.)Plasma D.)
  81. Chemistry

    1. Iron oxide and carbon monoxide react according to the following equation . Identify which reactant is limiting and which is excess if 43.5 grams of Fe2O3 reacts with 43.5 grams of CO Fe2O3 + 3CO2 --> 3CO2 + 2Fe 2. Calculate the percent yield of
  82. Chem hw!

    1. What pressure would be needed to compress 25.1 mL of hydrogen at 1.01 atm to 25% of its original volume? 2. If the pressure on a 1.04-L sample of gas is doubled at constant temperature, what will be the new volume of the gas? 3. A 1.04-L sample of gas
  83. Chem hw!

    1. What pressure would be needed to compress 25.1 mL of hydrogen at 1.01 atm to 25% of its original volume? 2. If the pressure on a 1.04-L sample of gas is doubled at constant temperature, what will be the new volume of the gas? 3. A 1.04-L sample of gas
  84. Chemistry

    Hello, I need help with calculations for lab. I prepared excess NaOH and HCL solutions (unknown conc., ~0.1M). Then I standardized my NaOH solution by titrating known amounts of KHP (Potassium hydrogen phthalate)with it in the presence of phenolphthalein
  85. econ

    1. A bank has $120 million in total assets, which are composed of reserves, loans, and securities. Its only liabilities are $120 million in transactions deposits. The banks exactly satisfies its reserve requirement, and its total reserves equal $6 million.
  86. science

    Of the following, which is NOT an adaptation made by reptiles to life on land? thick, dry, water-proof skin exchange oxygen and carbon dioxide in lungs only eggs with leathery shells open circulatory system I think its either C or B
  87. Chemistry

    Could you help me with these Directions: Either it's a carboyhdrate, lipid, protein, nucleic acid It's monomers contain NH2 amd COOH groups Controls cell reproduction and activities Ratio of hydrogen to oxygen is 2:1 Is held together with peptide bonds
  88. Chemistry

    are these items belowed classified as a heterogeneous mixture, a solution, a compound or and element? chalk clear spring water oxygen tomato soup pencil ice and soda sterling silver iron
  89. Science please help

    It is important that you maintain a healthy weight both for your overall health and so that your respiratory system can A. deliver oxygen more adequately B. pump blood more forcefully from the heart C. keep capillaries constricted D allow for smaller
  90. irsc

    Identify the pure substances in the list. If there is more than one, select all the apply. a) gold (Au) b) Air (mostly N2 and O2) c) white blood d) saline solution e) alcoholic drink f) ethanol (CH3CH2OH) g) elemental oxygen h) table salt (NaCl)
  91. Chemistry

    What is the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen? -I found this to be C3H3O and WebAssign says it's right. I need help with part b. If the molar mass of the above compound is 110 grams/mole, what is the
  92. Chem

    Please tell me if these are right. How many grams are needed to obtain 1.5 moles of magnesium oxide? I got 60grams is this right? Write a balanced equation for the reaction of the magnesium and the oxygen including their physical states. I got 2Mg=Mg2+O2?
  93. chemistry

    N2H4 reacts with oxygen to yield nitrogen gas and water . The reaction of 3.80g n2h4 evolves 73.7kj of heat. what's the enthalpy change per mole of hydrazine combusted.
  94. chemistry

    a current of .500 A is used for the electrolytic decomposition of water. how long (in hours) will it take to produce 1.0 L (Standard temperature and pressure) of hydrogen gas? what mass of oxygen gas will be produced at the same time?

    Calculate the energy in kJ/mol of light with a wavelength of 360 nm. 9.17 * 10^-43 J/mol Oxygen gas at 34.5 °C expands from 34.5 L to 45.7 L against a constant pressure of 750 mmHg. What is the work done in joules by the system? 1.13*10^3 J
  96. Chemistry

    In this balanced equation 4Al + 3O2 = 2Al2O3. When 0.54 mole aluminum is reacted in a closed container with 7.80 g oxygen, how many grams of aluminum oxide can form. Please show steps to work out. Thanks
  97. Chemistry

    Calculate the total pressure (in atm) of a mixture of 0.0300 mol of helium, He and 0.0200 mol of oxygen O2 in a 4.00 L flask at 20 degrees C. Assume the ideal gas behavior. Can someone help me start this out... Please
  98. anatomy

    If the pleural space lost its negative pressure which of the following would be true? A.Inspiation would be more difficult B.Expiration would be more difficult C.Sufactant wouldnt be needed D. Exchange of oxygen and carbon dioxide would improve I think it
  99. science

    Do houseplants affect the quality of air in a house? Describe an experiment that would answer this question. What gases do you want to measure? I answered yes since plants give off oxygen which animals need to survive. I need a little help with the
  100. Chemistry

    2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(g) In the equation, if 14 L of ethane (C2H6) and 14 L of oxygen (O2) combined and burned to completion, which gas will be leftover after the reaction, and what is the volume of that gas remaining?