1. Chemistry

    Suppose that 14.9 mL of 0.0512 M NaOH were required to titrate a sample of unknown acid. How many moles of NaOH were used?
  2. Physics

    How much heat is required to melt 50 grams of ice heat it to its boiling point and then turn it into vapor
  3. physics

    How much energy is required to melt 0.1 kg of water (hfusion = 80 cal/g, hvaporiztion = 540 cal/g) at 0oC.
  4. Chemistry

    How much heat energy, in kilojoules, is required to convert 63.0g of ice at −18.0 ∘C to water at 25.0 ∘C ?
  5. Chemistry

    Suppose that 16.41 mL of 0.0512 M NaOH were required to titrate a sample of unknown acid. How many moles of NaOH were used?
  6. Physics

    A 0.4-kg ball has a velocity of 20 m/s. a. What is the kinetic energy of the ball? b. How much work was required to lift the box to this position?
  7. physics

    A weightlifter is trying to carry a 10 kg weight held over his head across the room. How much energy will be required to do this work on the 10 kg weight?
  8. chemistry

    What mass of MgSO4 · 7H2O is required to prepare 300 mL of a 0.61 M MgSO4 solution? Answer in units of g
  9. chemistry

    How many grams of potassium nitrate are required to produce 5.00 g of potassium nitrite according to the equation below? 2KNO3(s) ---> 2KNO2(s) + O2(g)
  10. Chemistry

    The specific heat of graphite is 0.71 J/g oC. Calculate the energy required to raise the temperature of 1.0 mol of graphite by 1.0 oC.
  11. Chemistry

    if you are given the equation 2NO(g)+o2(g)->2NO2 and you are given the volume of NO is 150mL. how do you find what the volume of O2 is required (at the same pressure and temperature)?
  12. Chemistry

    How many moles of hydrochloric acid are required to react with 2.57 moles of calcium hydroxide in a neutralization reaction?
  13. Chemistry

    Calculate the heat required to convert 5gm of ice at 0oc into 5gm of steam at 100oc.
  14. hvac

    calculate the amount of heat required to change 5 pounds of ice at 32 degrees to water 32 degrees
  15. value

  16. chemistry

    The natural acidity of milk is 0.16% - 0.18% by mass. Predict how many mL of .1M NaOH will be required to neutralize a 50.0g sample of milk.
  17. Engineering

    A receiver requires 10 mW as input power. If all the system losses add up to 50 db, then how much power is required from all the source ?
  18. chemistry

    what volume of a 0.34M MgCI2, solution is required to make 250ml of a 0.10M solution by dilution?
  19. Geometry

    If m<AHM = 3x+5 and m<TMH = 7x-27, find m<AHM prntscr(dot)com/3n61w3 For figure required for problem.
  20. Chemistry

    1. Suppose that 10.2 mL of 0.0512 M NaOH were required to titrate a sample of unkown acid. How many moles of NaOH were used?
  21. Chemistry

    Suppose you titrated a sample of distilled water with EDTA, approximately what volume of EDTA would be required?
  22. physics

    how many kcals are required to cool one gallon/liter of water from 32degrees celcius to 7 degrees celcius?
  23. chemistry

    given relative permitivity of water, how much energy (kj/mol) is required to break the hydrogen bond in water? (Er=80.0)
  24. chemistry

    calculate the molarity of H2O2 if 25ml of H2O2 required 12 ml of 0.1M KMN04? The right answer 0.24M who helps
  25. Physics

    What is the magnitude of the average force required to stop an 1400kg car in 9.0s if the car is traveling at 85km/h ?
  26. Chemistry

    what mass of nitrogen gas is required to react completely with 2.79 of hydrogen gas to produce ammonia?
  27. Physics

    How much energy is required to move a 900 kg object from the Earth's surface to an altitude twice the Earth's radius?
  28. Physics

    How much energy is required to move a 900 kg object from the Earth's surface to an altitude twice the Earth's radius?
  29. Chemistry

    How much heat is required to warm 122g of water by 23.0°C? Specific heat is 4.184 J/g° C. Please show work:(((
  30. Probability and statistics

    The probability that at most 3 tosses of a balanced dice are required to get a prime number on top is equal to a. 7/8, b.1/4, c. 1/2, d.3/4.
  31. Chemistry

    How much heat is required to melt 75.5g of ice at -25 degrees Celcius, and convert it to steam at 105 Celcius
  32. finance

    the company has agreed that the required contribution will grow by 3.2 percent per year. When should the company harvest the forest?
  33. chemistry

    What volume of a 0.610 M NH4I solution is required to react with 525 mL of a 0.300 M Pb(NO3)2 solution?
  34. chemistry

    What volume of LR(Lactated Ringer's) solution would be required to make 1.0L of a solution that was .050M in chloride ion?
  35. GA perimeter

    What is the specific heat of a metal if 7.74 x 103 J of energy is required to warm a 75.0 g sample of the metal from 10 °C to 125 °C?
  36. chemistry........help!! =)

    How many grams of FeSo4 are required to prepare 0.50 L of a 0.010 M FeSO4 solution? I don't need the answer just shown how to do it! thanks
  37. Physics

    A 3000 lb car has an initial velocity of 10 mi/h. How much force is required to accelerate the car to a speed of 50 mi/h in 10 seconds?
  38. chem

    Calculate the amount of heat required to convert 17.5g of ice at -33.5∘C to steam at 100.0∘C.
  39. Chemistry

    How much energy (in kj) is required to ionize 2.78 moles of hydrogen atoms the right answer is: 3.65x10^3 kj wondering how they got this answer.
  40. physical science

    suppose you want to heat 40kg of water by 20 degrees celcius. how many joules of heat are required?
  41. criminal justice

    The term refers to the "procedures that are required by law" and reflects ideas about justice and fairness.
  42. Chemistry

    Suppose that you used 0.75g of iron. What is the minimum volume of 1.5 M_ CuSO4 solution required Using eqn. (3-1)? and eqn. (3-2)?
  43. physics

    How much energy will be required to move a balance system to move it 4 centimeter towards up and down side (linear motion).
  44. Chemistry

    What volume of 14.1M HBr is required to make 250mL of 1.25M HBr solution by dilution with water?
  45. Finance

    Describe the relationship between the coupon rate and the required rate that will result in a bond selling at a discount?
  46. Science

    10.0 g of KCl and 18.5 g of CaCl2 were dissolved in 500 mL of water. How many mL of 1.57 M AgNO3 solution would be required to precipitate all Cl- from the solution?
  47. Chemistry

    Calculate the amount of heat required to raise the temperature of a 33 g sample of water from 6 Celsius to 24 Celsius.
  48. chemistry

    How many Joules are required to heat 2 g of silver from 50 ◦ C to 70 ◦ C?
  49. Chemistry

    How many mL of a 6 M HCl solution are required to prepare 200 mL of a 0.2 M solution?
  50. home economics

    minerals required in very small amounts are known as _ _ _ _ _ minerals!
  51. science

    how many ml of 6M HCl solution are required to bring the pH of 10 ml of a 4M NaOH solution to 2.0
  52. chemistry

    what volume of 2.0 M NaCl is required to prepare 150 mL of 0.10 M NaCl?
  53. chemistry

    How many grams of NaCl are required to make up 2.00 L of a 4.00 M solution of NaCl
  54. Chemistry

    100.0 ml of 0.25 M HCL are required to titrate 65 ml of NaOH. What is the M of the NaOH?
  55. Chemistry

    What volume(ml) of 8.0 M solution is required to make 134.3 ml of 1.2 M solution
  56. chemistry

    how many ml of 6M HCl solution are required to bring the pH of 10 ml of a 4M NaOH solution to 2.0
  57. chemistry

    5. How many grams of KNO3 will be required to prepare 800 mL of 1.40 M KNO3?

  59. Chemistry

    What volume of 0.867 M solution is required to make 3.50 L of a solution with pH of 12.5?
  60. chemistry?

    what mass of Al(NO3)3 is required to remove 155g of Ba(NO3)2?
  61. chemistry

    what volume of water is required to make 0.20 M solution from 16 ml of 0.5 M solution?
  62. chemistry

    How many mL of a 4.7 M HNO3(aq) solution are required to make 500 mL of a solution with pH=2.10
  63. renwewable energy

    How much energy is required to accelerate a 8000 kg car from 14 km/h to 95 km/h?
  64. Chem

    how many grams of NH3 are required to completely react with 40.0 grams of NO.
  65. chemistry

    if 8.99g of scandium and 8.99g of oxgen react to give scandium oxide and a leftover 3.56g.what percentage of scandium oxide is the oxygen
  66. chemistry

    An oxygen gas with a volume of 50 mL at a pressure of 1.5 atm . This gas is compressed up to 35 mL volume at constant temperature . Determine the final gas pressure
  67. chemistry

    An oxygen gas with a volume of 50 mL at a pressure of 1.5 atm . This gas is compressed up to 35 mL volume at constant temperature . Determine the final gas pressure .
  68. Partial Pressure- Chemistry

    A gaseous mixture of O2 and N2 contains 31.8 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 445 mmHg?
  69. Physics

    A beam having a length of 20 metres is pivoted at its mid point. A 200 newton load is located at a point 5 metres from the right hand end of the beam. A 300 newton load is located at a point 8 metres from the right hand end. In order to be in equilibrium,
  70. Math

    A jug can hold 3 times as much juice as a mug if the jug can hold 2 L of juice how much juice in liters can the mug hold
  71. Chemistry

    The reform reaction between steam and gaseous methane () produces "synthesis gas," a mixture of carbon monoxide gas and dihydrogen gas. Synthesis gas is one of the most widely used industrial chemicals, and is the major industrial source of hydrogen.
  72. chem

    So I was given this question that I havetried to solve multiple times but I just can't get it. Here it is[it's a long one!] Nitroglycerin is a shock-sensative liquid that detonates by the reaction: 4 C3H5(NO3)3 -> 6 N2 + 10 H20 + 12CO2 + 02 Calculate
  73. Chemistry

    Chemical analysis of a gas shows that it contains one carbon atom for every one hydrogen atom. The densiry ofthis gas is 1.161 g/l at STP. What is the minimus oxygen volume needed at STP for the complete combustion of .500 mol of this gas?
  74. chem

    Which shows the greatest metallic character? -Na -K -Rb -Cs Also, What ions are very important for the proper functioning of biologic systems such as nerves and muscles? --oxygen ions --nitride ions --alkali metal ions --alkaline earth metal ions
  75. chemistry

    A 25g sample of a compound composed of Carbon, Hydrogen, and Oxygen was combusted. 55grams of Carbon Dioxide and 30 grams of water were collected. A) What is the empirical formula of the compound? B) If the compound has a molar mass of 120g what is the
  76. physics

    calculate minimum effort required to move load of 39 Newton in inclined plane whose length of slope is 39m ,height is 5m, distance from the base is 12m?
  77. physics

    A merry-go-round of mass 1640kg has a radius of 7.5m. How much work is required to accelerate it from rest to a rotation rate of 1 rev. per 8 seconds? (assume a solid cylinder) /

    DETERMINE THE TEMPERATURE REQUIRED FOR 0.0354MOL OF GAS TO FILL A BALLOON TO 2.5L UNDER 0.998K PA PRESSURE PV = nRT. Change kPa to atmospheres and use R = 0.08206 L*atm/mol*K.
  79. chemistry

    what volume of 0.1 moldm-3 HCL acid would be required to dissolve 2.3 grams of calcium carbonate equation CaCO3+2HCL----------=CaCl2+CO2+H20 (WATER)
  80. Chemestry

    Calculate the volume of a 0.225 M solution of potassium hydroxide,KOH,required to react with 0.215g of acctic acid,CH,COOH=KCH,COO+H2O.

    determine Fe3+ in a solution that may be in the 0.0001 to 0.0005 M range.outline a spectrophotometric method that would accurately give the required data. be specific about the solutions that you would use.
  82. Chemistry

    how many mL of .122 M MnO4- are required to react with an excess of C2O42- in order to produce 75.25mL of carbon dioxide gas measured at 30 degree C and 715 torr?
  83. nuclear engineering

    Determine the amount of energy required (in MeV) to dissociate the following elements into component parts (protons, neutrons and electrons) • Hydrogen • Deuterium • Tritium
  84. chemistry

    Using the volume 1.42mL of 95% ethyl alcohol that's required to dissolve 0.3g at 78 C, how do i find how much sulfanilamide that will remain in the mother liquor after the mixture is cooled to 0 C? (at 0 degrees=14mg/mL is the solubility) thanks
  85. Math

    Find the coordinates of the point at 180 degrees on a circle of radius 3.4 centered at the origin. Round your answers to three decimal places, if required. ( , 0 ) I got 0 as the y coordinate. Please help me solve for x
  86. chemistry

    The solubility product for Zn(OH)2 is 3.0x10^-16. The formation constant for the hydroxo complex,Zn(OH)4^2- , is 4.6x10^17. What is the minimum concentration of OH- required to dissolve 1.6×10−2 mol of Zn(OH)2 in a liter of solution?
  87. math for busness and finance

    what sinking fund payment would be required at the end of each six-month period, at 12% interest compounded semiannually, in order to amount to $40,000 within four years?
  88. Grammar

    Proofread the sentence and Insert punctuation as required. She reports the flare up is worse when she does not have her diabetes under control. Answer: I feel it doesn't need anything added to it. FINE as is! I hope! Thanks
  89. Chemistry

    What energy in kJ is required to break 4.24 mol of NH3 into atoms? As noted below, this information can be used to calculate ΔH for gas-phase reactions. I got 1376.18, which is wrong. All help is appreciated!
  90. physics, thermo

    calculate the heat required to produce 1.7 kg of wet steam at 2000 kpa from water at 160 degrees celsius and a dryness fraction of 81%, answer in kj.
  91. Thermochemistry

    What volume of benzene (C6H6, d= 0.88g/ml, molar mass= 78.11g/mol) is required to produce 1.5x10^3 kJ of heat according to the following reaction? I just can't figure out what equation to use to solve this. Help, please?
  92. College Physics

    How much energy is required to bring 10.0 grams of ice at -5.00 degrees to 105-degree steam? Assume the system is isolated so that no mass is lost to the surroundings
  93. Materials / Physics

    Find the force required to permanently deform (stretch such that it snaps back to >0.2% longer than original length) a .04 m diameter bar if YS = 1000 MPa.
  94. Analytical chemistry

    Calculate to four decimal places the mass of purely dry MgCO3(Magnesium Carbonate) required to make 1L of a 1000 ppm Mg stock solution.
  95. MacroEconomics

    Testing procedures required by the US Food and Drug Administration raise the cost and price of drugs. Should we eliminate such requirements in order to ease inflationary pressures?
  96. Social studies

    Is voting an important civic responsibility? A. It is part of the constitution B. Is required by law C. It determined the best known members of a community D. It ensures that government represents the people
  97. statistics

    Find the test statistic for the following proportion: A collection of 500 randomly selected teachers revealed that 61% felt that all students should be required to take algebra in high school.
  98. physic

    a motor of mass 800kg traveeling at 20m/s is brought to rest by brakes in 100m calculate the average braking force required if the object moves in three second
  99. Chem 1

    Suppose 1.624g of salt FeSO4 is placed in a 250mL flask to which 50mL of water and 10 mL of 3M H2SO4 are added. How many mL of .1062 M KMnO4 solution are required to reach the endpoint?
  100. physics

    How much work is required to push a crate at constant velocity with a force of 185 N across a floor a distance of 8 m? J How many calories of thermal energy are produced by the friction? cal