1. math modeling

    Determine the annual interest rate r required for an investment with continuous compound interest to yield an effective rate of 9.94%.

    asked by math on October 25, 2011
  2. physics

    A 36-N force, parallel to the incline, is required to push a certain crate at a velocity of 9.1 up a frictionless incline that is 45° above the horizontal. The mass of the crate is:

    asked by mohammed on November 6, 2014
  3. chemistry

    How many enthalpy changes (ÄH’s) would be required to calculate the total enthalpy change when ice at 0.0oC is turned to steam at 100.0oC?

    asked by Anonymous on February 20, 2014
  4. chemistry(please check formula)

    how much energy i kj is required to change the temp of 1.00 kg of fe from 25.0 degrees celsius to 1515 degrees celsius? so it would be q= (.449)(1.00)(1490)-correct?

    asked by danielle on April 4, 2010
  5. Chemistry

    A 0.110-L sample of an unknown HNO3 solution required 52.1 mL of 0.150 M Ba(OH)2 for complete neutralization. What was the concentration of the HNO3 solution?

    asked by Lori on November 9, 2013
  6. Physics

    Calculate the final centigrade temperature required to change 20 litres of gas at 120°C and 1 atmosphere to 25 litres at 2 atmosphere.

    asked by Busola on February 11, 2017
  7. physics

    How many mL of orange juice would be required to get the recommended daily allowance of 60 mg of vitamin C? (Concentration of vitamin C is .011 moles/L in 5.0 mL of juice).

    asked by Seth on May 4, 2011
  8. chemistry

    what volume of .1 M solution of NaOH is required to precipitate all of the nickel 2+ ions from 250 mL of a .273 M solution of nickel (II) nitrate?

    asked by Anonymous on March 12, 2016
  9. Math

    concrete is to be mixed using cement and sand into the ratio 2:5. how much sand will be required to mix with 96 pounds of cement? use proportion to solve

    asked by Hailey on May 16, 2016
  10. Chemistry

    What volume of 0.1000 M oxalic acid (a diprotic acid) would be required to completely neutralize 100.00 mL of 0.1000 M NaOH?

    asked by Anonymous on October 5, 2014
  11. math

    A circula garden whose radius is 14 m is fenced by posts which are 6 m far apart from each other.Find the number of posts which will be required to fence the circular garden.

    asked by kelvin on June 1, 2018
  12. Chemistry

    What mass of oxalic acid dihydrate , H2C2O4•2H2O, is required to prepare 220.0 ml of a 1.28 M solution of oxalic acid ?

    asked by Cynthia on February 22, 2012
  13. social studies

    Does anyone know a place where I can find out what the required # years of education was in 1985 in USA? And the average wage rates in USA in 1985? Thanks so much.

    asked by e.l on May 29, 2009
  14. Chemistry

    What volume of 0.1000 M oxalic acid (a diprotic acid) would be required to completely neutralize 100.00 mL of 0.1000 M NaOH?

    asked by Anonymous on October 5, 2014
  15. chemistry

    how many joules are required to heat a frozen can of juice (360 grams) from -5 degrees Celsius to 110 degrees celsius

    asked by jackie on November 5, 2012
  16. physics

    A 22-N force, parallel to the incline, is required to push a certain crate at a velocity of 6.1 up a frictionless incline that is 55° above the horizontal. The mass of the crate is:

    asked by Ahmad on November 5, 2014
  17. Chemistry

    1. What volume of nitric acid solution with mass fraction of 16% is required to make make 250ml solution with 0.2mole/l?

    asked by Daniel on September 15, 2015
  18. physics-7

    A spaceship travels 1220 km with a constant uniform acceleration. How much time is required for the acceleration if the spaceship increases its speed from 11.1 km/s to 11.7 km/s ?

    asked by NoNo100 on September 16, 2009
  19. Science

    How much time is required for reflected sunlight to travel from the Moon to Earth if the distance between Earth and the Moon is 3.85 x 10 to the 5th exponent?

    asked by Margaret on October 8, 2012
  20. Chemistry

    Assuming the mass of 5% Acetic Acid is 1.0g/mL, what volume of acetic acid is required to neutralize 25.0mL of 0.10M NaOH?

    asked by EDK on November 12, 2009
  21. chemistry

    A 25.0-mL sample of H2SO4 is neutralized with NaOH. What is the concentration of the H2SO4 if 35.0 mL of 0.150 M NaOH are required to completely neutralize the acid?

    asked by tiya on March 2, 2014
  22. Chemistry

    How much heat in kJ is required to melt 54 grams of ice at 0 degrees C into water at 0 degrees C if delta Hvap for water = 6.01 kJ/mol?

    asked by Hannah on December 14, 2010
  23. math

    A square tile is having side of length 15cm.how many such tiles would be required to cover the square floor of abathroom of side 3m.

    asked by perimeter on February 24, 2017
  24. chemistry

    A 0.115-L sample of an unknown HNO3 solution required 31.1 mL of 0.100 M Ba(OH)2 for complete neutralization. What was the concentration of the HNO3 solution?

    asked by Anonymous on July 7, 2012
  25. Chemistry

    If 14.23 mL of 0.203 M NaOH is required to neutralize .269 g of a monoprotic unknown acid, what is the molecular weight of the unknown acid?

    asked by Tiffany on October 9, 2014
  26. chemistry

    Calculate the volume of the specified titrant required to neutralize 35 ml of .4 M NaOH. Titrant: 0.75 M H2SO4 [2NaOH + H2SO4 „» 2H2O + Na2SO4]

    asked by luv2swim on July 24, 2011
  27. Chemistry

    Given the reaction: Fe2SiO4 (s) + 2 H2CO3 (aq) ---> 2 FeCO3 (s) + H4SiO4 (aq) how many grams of Fe2SiO4 (s) are required to completely react with 55.0 mL of .500 M H2CO3 (aq) ?

    asked by Erin on March 8, 2017
  28. Chemistry.

    the titration of 25cm^3 of a zinc solutn required 23 82cm^3 of 0.0105molar EDTA solutn. Calculate the conc of zinc in g/dm^3.

    asked by Ade oba naim on June 9, 2013
  29. finance and accounting

    Identify several ways in which you currently use accounting information in your life as a student. Also identify several situations in which, while you are still a student, you might be required to supply financial?

    asked by Munazza on November 8, 2015
  30. trig

    a 725 pound trailer is sitting on a ramp inclined at 36 degrees. how much force is required to keep the trailer from rolling down the ramp??

    asked by Anonymous on April 16, 2014
  31. Biology

    1. Contraction of the diaphragm causes: A. a person to exhale. B. the size of the chest cavity to increase. C. air to flow from the lungs to the outside. D. compression of the lungs. is it B 2. The function of the large intestine is to: A. supply enzymes

    asked by Amy on August 10, 2013
  32. CHEMISTRY

    I've been trying to do this problem but I would get confused and stuck.. Consider a sample of a hydrocarbon at 0.959 atm and 298 K. Upon combustion the entire sample in oxygen, you collect a mixture of gaseous carbon dioxide and water vapor at 1.51 atm and

    asked by J on November 7, 2008
  33. Physics

    A 64.7 kg astronaut is on a space walk away from the shuttle when her tether line breaks. She is able to throw her 14.1 kg oxygen tank away from the shuttle with a speed of 7.45m/s to propel herself back to the shuttle. Assuming that she starts from rest

    asked by Ted on February 26, 2013
  34. Chemistry

    Virtually all the nitric acid manufactured commercially is obtained by the ammonia oxidization process. This involves this first step: Ammonia gas combines with oxygen to form nitrogen monoxide and water vapour. a) Write a balanced equation for the

    asked by Kayla on January 20, 2015
  35. Biology please help

    1. Contraction of the diaphragm causes: A. a person to exhale. B. the size of the chest cavity to increase. C. air to flow from the lungs to the outside. D. compression of the lungs. is it B 2. The function of the large intestine is to: A. supply enzymes

    asked by Amy on August 10, 2013
  36. chemistry

    what makes a good buffer? is it that it has a strong base and a strong acid? and why is blood a good buffer? is that because the oxygen it carries acts as a strong base?

    asked by joyce on March 31, 2010
  37. Chemistry 1201

    An unknown compound contains only carbon, hydrogen, and oxygen (C?H?O?). Combustion of 6.50 of this compound produced 9.53 g of carbon dioxide and 3.90 g of water. 1) How many moles of Carbon? 2) How many moles of Hydrogen?

    asked by Dylan on March 28, 2012
  38. HONORS CHEMISTRY

    A synthesis of nitrogen dioxide from nitrogen and oxygen. There are 5.000 mol of N2 and 8.000 mol of O2 mixed in a 5.000-L flask. What is the equilibrium constant for the synthesis?

    asked by helpless on March 17, 2010
  39. U.S. History

    1. What actions did progressives take to deal with the issue of child labor? A: Progressives established a National Child Labor Comittee in 1904 to work to abolish child labor. 2. How did Roosevelt's policies help protect the health of consumers and the

    asked by Victoria on October 20, 2015
  40. Chemistry

    Hello, I had a lab about calorimetry and one of the questions was if the reaction of acetone with hypochlorite is an oxidation/reduction or acid/base. Would the answer be: oxidation/reduction because the oxygen from the hydroxide from the Sodium hydroxide

    asked by Robert on May 16, 2012
  41. Chemistry - Stoichiometry/gases

    When 2.38 g of methane burns in oxygen, 119 kJ of heat is produced. What is the enthalpy of combustion (in kJ) per mole of methane under these conditions? Your answer will be in kJ/mol. the Molar Mass of methane is 16.04, so I did 2.38g/16.04=0.14838 mol

    asked by Jamie on July 23, 2017
  42. conversions check my answers

    I need these checked, thanks! 1. a) 8.95cm to meters= 0.0985m b) 1298.4g to kilograms = 1.3kg c) 129cm to millimeters = 1290mm d) 2452 mL to liters = 2.452L 2) A cyclist rides at an average speeed of 24mi/h. If she wants to bike 15km, how long (in hours)

    asked by Student00 on January 25, 2007
  43. MATH

    a molecule of sodium carbonate contains 2 atoms of sodium to every 3 atoms of oxygen. could a compound containing 12 atoms of sodiumand 15 atoms of o2 be na carbonate explai

    asked by AMY on March 4, 2014
  44. chemistry

    calculate the heat energy required to raise the temperature of a 500 gram iron pipe from 25 degrees celcius to 100 degrees celcius

    asked by zigggy on January 6, 2010
  45. physics

    A microwave runs off a 110. V circuit and draws 7.00 A of current. How much water would be required to run the microwave for 10.0 minutes if it is powered by a 10.0­m high water wheel?

    asked by john jhon on April 25, 2016
  46. AP Chemistry

    What volume of 0.149 M K3PO4 is required to react with 41 mL of 0.793 M MgCl2 according to the equation 2 K3PO4 + 3 MgCl2 → Mg3(PO4)2 + 6 KCl Answer in units of m

    asked by Yolanda on October 7, 2011
  47. Physics

    A 25.0kg pickle is accelerated from rest through a distance of 6.0m in 4.0s across a level floor. If the friction force between the pickle and the floor is 3.8N, how much work is required to move the object?

    asked by Sandara on January 1, 2014
  48. organic chemistry

    How many milliliters of boiling water are required to dissolve 25 g of phthalic acid? If the solution were cooled to 14 degree Cellucius, how many grams of phthalic acid would recrystallize out?

    asked by felici on September 2, 2012
  49. Physics 11

    Show that the minimum force required to pull a wheel if Radius R and mass M over a step of height h, given R> h when the force is applied at the top of the wheel is F = Mg sqrt(h/2R-h) Thank you so much

    asked by Raylene on November 7, 2013
  50. Chemistry

    If 920 mL of 0.0402 M aqueous LiOH reacts stoichiometrically according to the balanced equation, what mass (g) of gaseous CO2 is required? 2 LiOH(aq) + CO2(g) → Li2CO3(aq)

    asked by DJ on September 28, 2010
  51. Math

    A weight of 150 lbs is placed on a smooth plane inclined at an angle of 24° with the horizontal. What is the required force needed to prevent the weight from sliding down the plane?

    asked by Alexa on July 30, 2015
  52. chemistry

    How many joules of heat are required to completely covert 85.0 grams of water at 40.0° C to steam at 100°C? For water: c = 4.179 J/g °C Hfusion = 6.01 kJ/mol Hvap = 40.7 kJ/mol

    asked by har on April 20, 2016
  53. chemistry

    A heater caused the temperature of a 550 g Aluminum block to change from 22 degrees C to 145 degrees C. How many calories were required to heat the metal block?

    asked by cam on April 11, 2011
  54. chemistry

    A 12.6 mL sample of vinegar, containing acetic acid, was titrated using 0.542 M NaOH solution. The titration required 24.1 mL of the base. what is the molar concentration of acid in the vinegar?'

    asked by walter on June 14, 2015
  55. Chemistry

    Assuming the sample is pure sodium sulfate, how many mL of 5% BaCl2.2H20 solution would be required to precipitate the sulfate. Density of barium shloride solution of 1.00 g/mL.

    asked by Mika on October 8, 2011
  56. finance

    dividend pays $2 risk free rate 4% expected return 14% price of shares 1 year from now $22 beta is 1.25 what is the market required rate of return?

    asked by Tiffany on May 31, 2008
  57. maths

    A cylindrical vessel without a lid is made from a sheet of metal . Find the area of the metal required if the length of the vessel is 35cm and its diameter is 28cm ????

    asked by tuhituhi on November 21, 2012
  58. chem

    if a 240mg of an acid H2A required 50.0ml of 0.10M NaOH for complete neutralization, what is yhe equivalent weight of the acid? what is its molecular weight?

    asked by rose on January 28, 2013
  59. physics

    The speed of a transverse wave on a string is 470 m/s, and the wavelength is 0.1 m. The amplitude of the wave is 1.6 mm. How much time is required for a particle of the string to move through a total distance of 1.0 km?

    asked by carter montgomery on January 28, 2013
  60. physics

    A force of 36.1 N is required to start a 4.0 -kg box moving across a horizontal concrete floor. If the 36.1 N force continues, the box accelerates at 0.71 m/s^2. What is the coefficient of kinetic friction?

    asked by Kim on October 1, 2010
  61. physics

    A force of 30.0 N is required to start a 3.8 kg box moving across a horizontal concrete floor If the 30.0 N force continues, the box accelerates at 0.50 m/s2. What is the coefficient of kinetic friction?

    asked by miya on November 10, 2009
  62. stats

    How many green elements are required to make this a legitimate probability distribution if there are a total of 50 elements in this sample? x red blue orange brown green P(x) 0.18 0.20 0.32 0.28

    asked by Anonymous on October 7, 2012
  63. chemistry

    Chromium metal can be plated onto an object from an acidic solution of dichromate ions. What average current is required to plate 17.8 g of chromium metal in a time of 2.20 h?

    asked by Rishikesh on April 19, 2008
  64. Chemistry

    In a titration experiment, 15.0 mL of 0.10 M Ba(OH)2 is required to titrate a 10.0 mL of an unknown solution of HNO3. Calculate the concentration of the HNO3 solution using the data. 2HNO3 + Ba(OH)2 ® Ba(NO3)2 + 2H2O

    asked by Kevin on April 18, 2018
  65. physics

    How many grams of KOH are required to neutralized 300ml of 5.0 N HN03 solution? final answer nyan 84 grams kailangan nalang namen ng solution

    asked by jhon earl on April 10, 2012
  66. physics

    calculate the amount of work it takes to increase a cars speed from 10mph to 30 mph and from 50mph to 60mph. Is more work required for 10mph to 30mph?

    asked by sam on August 6, 2014
  67. chemistry

    How many kilojoules of heat is required to completely covert 60.0 grams of water at 32.0° C to steam at 100°C? For water: s = 4.179 J/g °C Hfusion = 6.01 kJ/mol Hvap = 40.7 kJ/mol

    asked by Kate on November 29, 2010
  68. Chemistry

    8.5g of sample of iron required just 75cm3 of 3.00M HCl to dissolve it and give a neutral solution.Calculate the percentage purity of the sample of iron.

    asked by Kazembeous on November 16, 2014
  69. trigo

    A plane in calm weather flies east at 20 K.P.H. A 45 K.P.H wind blows from the north. Find the direction and speed required to keep the plane in it's original course and speed.

    asked by carl on November 21, 2015
  70. calculus

    A conical tank has a diameter of 9ft and is 12 ft deep. If the tank is filled with water of density 62.4 ft/cubic ft, how much work is required to pump the water over the top?

    asked by Anonymous on February 15, 2012
  71. physics(please help! please)

    *please help ily*. a fishing pole, 2m long, is pivoted at 50cm from one end. the other end has a line with a 4 kg fish on it. what is the effort force required to land the fish?

    asked by please help on April 21, 2014
  72. statistics

    the times required to assemble a product part are normally distributed with a mean of 54.4 minutes & a standard deviation of 5.2 minutes. What fraction of the assemble workers require more than one hour?

    asked by lia on November 15, 2011
  73. physics

    A spherical steel ball bearing has a diameter of 2.540 cm at 23°C. (a) What is the diameter when its temperature is raised to 106°C? (b) What temperature change is required to increase its volume by 0.8%?

    asked by Kim on November 30, 2009
  74. Chemistry

    Water is exposed to infrared radiation of wavelength 3.0×10^−4 cm. Assume that all the radiation is absorbed and converted to heat. How many photons will be required to raise the temperature of 1.7 g of water by 2.2 K?

    asked by Kyle on November 9, 2009
  75. Math

    A 73​-ton monolith is transported on a causeway that is 2500 feet long and has a slope of about 2.2°. How much force parallel to the incline would be required to hold the monolith on this​ causeway?

    asked by Lucy on November 3, 2016
  76. Accouting

    How much investment per dollar of expected annual operating savings can a company afford if the investment has an expected life of 8 years and its required rate of return is 14%?

    asked by Andrew on May 5, 2012
  77. difficult chemistry

    Calculate the molarity of thiosulfate solution if 0.400mg of Kl03 required 100ml of the thiosulfate solution provided that excess kl and hcl were added. Who helps me

    asked by Fai on January 12, 2013
  78. physic

    Hi! help me please, Thank you. A spherical steel ball bearing has a diameter of 2.540 cm at 23°C. (a) What is the diameter when its temperature is raised to 94°C? cm (b) What temperature change is required to increase its volume by 0.9%? I only need help

    asked by Chan on December 1, 2009
  79. chemistry

    A volume of 100mL of a 0.800 M HNO3 solution is titrated with 0.640 M KOH. Calculate the volume of KOH required to reach the equivalence point.

    asked by LL on August 6, 2012
  80. math

    a cylindrical vessel without lid is made from a sheet of metal find the area of metal required if the length of the vessel is 35cm and its diameter is 28cm.

    asked by akash tiwari on March 13, 2016
  81. Medical Manager

    I have to write a paper on compare and contrast the differences between a medical biller in a physician's office and a medical biller in a hospital? Discuss the responsibilities required in each Please help me thank you

    asked by Susan on July 24, 2011
  82. chemistry

    Calculate the volume of 0.1 molar hydrochloric acide solution required for titration of 20 ml of 0.5 molar sdium carbonat solution till complete reaction

    asked by Anonymous on December 21, 2010
  83. Chemistry-TITRATION

    A titration of 15.0 cm3 of household ammonia, NH3, required 38.57 cm3 of 0.78M HCl. Calculate the molarity of the ammonia. please show work and detail.

    asked by Paige on January 15, 2009
  84. chemistry

    How many kilojoules of heat is required to completely covert 60.0 grams of water at 32.0° C to steam at 100°C? For water: s = 4.179 J/g °C Hfusion = 6.01 kJ/mol Hvap = 40.7 kJ/mol

    asked by Kate on November 29, 2010
  85. Chemistry

    A volume of 100mL of a 0.330M HNO3 solution is titrated with 0.370M KOH. Calculate the volume of KOH required to reach the equivalence point.

    asked by Ines on October 23, 2014
  86. Chemistry

    What mass of lithium (in g) is required to react completely with 57.5mL of N2 gas at STP? Lithium reacts with nitrogen gas according to the following reaction: 6Li(s)+N2(g)→2Li3N(s)

    asked by Carter on March 19, 2014
  87. math

    a group of hockey officials consists of 6 referees and 5 linesmen. the probability that the youngest referee and linesman would be selected if one referee and two linesman are required is a) 1/15 b)1/30 c) 1/60 d)1/120

    asked by dave on July 29, 2010
  88. applied physics

    the work required to lift eleven 94.0lb bags of cement from the ground to the back of a truck is 4340ft lb. what is the distance from the ground to the bed of the truck?

    asked by donna on April 22, 2013
  89. physics

    the speed of a wave in a 4 m rope is 3.2 m/s. what is the frequency of the vibration required to produce a standing wave pattern with 1 antinode? 2 antinodes? 4 antinodes? please help!!! i don't understand how to do this

    asked by Isabelle on January 5, 2015
  90. Chemistry

    The student used the KHP in a subsequent titration experiment where he titrated 25.00 +/- 0.03 ml of the acid against an unknown solution of NaOH. The titration required 23.70 +/- 0.10 ml of the base. What is the concentration of NaOH?

    asked by Aaeisha on August 9, 2015
  91. chemistry

    how would you calculate the number of milliliters of 1 M HCl required for .212 mol of HCl?? and how could i find out what remains in the beaker when distilled water is evaporated in a beaker?

    asked by Kayla on May 6, 2008
  92. Stats

    How many green elements are required to make this a legitimate probability distribution if there are a total of 50 elements in this sample? x red blue orange brown green P(x) 0.20 0.16 0.28 0.24 Would it be 0.11??

    asked by Jennifer on October 24, 2011
  93. science

    It takes 3.38 J of work to stretch a Hooke’s-law spring 5.63 cm from its unstressed length. How much the extra work is required to stretch it an additional 4.22 cm? Answer in units of J

    asked by jason on November 16, 2012
  94. Maths

    Find the volume of wood required for making the closed box with internal dimensions of 20cm by 12.5cm by 9.5cm;wood 1.25cm thick.

    asked by Priyanka on January 23, 2018
  95. physics

    The specific heat capacity of copper is 0.092 calories per gram per degree Celsius. How much heat is required to raise the temperature of a 5 g piece of copper from 0°C to 80°C?

    asked by FALLON on December 13, 2009
  96. Chemistry

    Consider the reaction: K2S(aq)+Co(NO3)2(aq)=2KNO3(aq)+CoS(s) what volume of 0.255 M K2S solution is required to completely react with 160 mL of 0.130 M Co(NO3)2?

    asked by David on April 29, 2016
  97. Physics

    A 10 kg block sits on a flat surface whose μs=0.60 and whose μk is 0.40 a. What horizontal force is required to get the block move? b.If we continue to apply the same force as in part a. what will the blocks acceleration be?

    asked by El on August 26, 2012
  98. math

    A computer password is required to be 5 characters long. How many passwords are possible if the password requires 1 letter(s) and 4 digits (numbers 0-9), where no repetition of any letter or digit is allowed?

    asked by hana on November 2, 2015
  99. physics

    If the torque required to loosen a nut on the wheel of a car has a magnitude of 40.1 N*m, what minimum force must be exerted by a mechanic at the end of a 38.2 cm wrench to loosen the nut?

    asked by Aslin on October 4, 2010
  100. Ethics

    As a matter of fairness, should individuals be required to pay for health services on the basis of their actuarial risk of illness or, alternatively, on the basis of their ability to pay? help?

    asked by Anonymous on April 5, 2017