1. Chemistry

    Assume that you found that the average volume of water required to fill the graduated cylinder to the 8.00 mL mark was 7.95 mL. What is the percent error?

    asked by Andrew Howard on January 27, 2010
  2. Math

    Find the angel in degrees required to shoot a cannon a distance of 200 yards. It's speed is 400 mps.

    asked by Jose on December 4, 2013
  3. physics

    How much work in eV is required to bring three charges of 5.4x10-19C from a great distance apart to 3.76x10-8m from one another (at the corners of an equilateral triangle)?

    asked by sally on January 29, 2018
  4. physics

    A 20kg mass moving at a speed of 3m/s is stopped by a constant force of 15N. Show that the stopping time required is 4s.

    asked by sherri on April 5, 2010
  5. Trigonometry

    Minimum force required to prevent a ball weighing 29.6 pounds from rolling down a ramp which is inclined 14.9 degrees with the horizon?

    asked by Casey Lewis on December 6, 2010
  6. Physics

    If m1 = 4.72kg, what mass m2 is required to balance the system? (two masses are connected by a rope. m1 is sitting on an incline and m2 is hanging from a pulley)

    asked by C.C. on March 5, 2014
  7. chemistry

    4FeCr2O4+ 8K2CO3+7O2= 2Fe2O3+8K2CrO4+8CO2 how many grams of FeCr2O3 are required to produce 44g of CO2?

    asked by henry on January 25, 2010
  8. Trigonometry

    Minimum force required to prevent a ball weighing 29.6 pounds from rolling down a ramp which is inclined 14.9 degrees with the horizon?

    asked by Casey Lewis on December 6, 2010
  9. College Physics

    Find the minimum work required to carry a truckload of furniture weighing 1.99 104 N to a third-story apartment, 24.0 m above the truck.

    asked by Allen on October 14, 2011
  10. 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
  11. physics help

    A flywheel turns through 32 rev as it slows from an angular speed of 2.1 rad/s to a stop. How much time is required for it to complete the first 16 of the 32 revolutions?

    asked by stanely on April 8, 2010
  12. Physics

    An 8.3 uF and a 2.9 uF capacitor are connected in series across a 24 V battery. What voltage is required to charge a parallel combination of the two capacitors to the same total energy?

    asked by Anonymous on October 16, 2013
  13. Physics

    Calculate the work required to pull a wagon along a horizontal road for 4.0x10^2 m at a constant speed of 3.0 m/s if the force of friction is 8.0 N.

    asked by Richard on April 28, 2015
  14. physics

    Calculate the work required to lift a 20kg object from the floor to a height of 2 meters. Give your answer in Joules

    asked by Darcie on February 26, 2012
  15. Chemistry

    How many mL of the 0.1029 M standard NaOH solution is required to titrate 0.2247 g sample of KHP to the phenolphthalein end point?

    asked by Erin on October 9, 2012
  16. PHYSICS

    COULD YOU FURTHER EXPLAIN HOW MANY BTU ARE REQUIRED TO RAISE THE TEMP OF500 GALLONS OF WATER FROM 70 DEGRESS TO 160 DEGREES FAHRENHIET

    asked by jay on November 25, 2012
  17. chem

    Calculate the number of moles required to make 100 mL of a 3.0 M solution of CuSO4·5 H2O. is the answer .03? if not walk me through the steps thanks

    asked by fgf on March 16, 2015
  18. math

    Give an example of a situation in which you might want to solve the savings plan formula to find the​ payments, PMT, required to achieve some goal.

    asked by Anonymous on September 12, 2018
  19. physics

    A ball has a diameter of 3.86 cm and average density of 0.0836 g/cm3. What force is required to hold it completely submerged under water?

    asked by jim on November 21, 2011
  20. Chemistry

    How do you do this problem? Calcuate the mass of CuCl2*5H2O required for preparing 400mL solution that of .25M in chloride ions.

    asked by Tiffany on October 11, 2012
  21. physics

    a sportsman develops a maximum speed of 12 m/s when he is swimming in a pool. Calculate the time interval that is required to travel a distance of 25 m.

    asked by annonymus on September 8, 2016
  22. international business

    4.Why is acceleration or delay of payments more useful to an IC than to smaller, separate companies? i was able to answer all but this question. i have read the material required but i don't quite get what they are asking?

    asked by james on February 18, 2008
  23. Chemistry

    How many calories are required at 0 degrees Celsius to melt an ice cube with a mass of 25 g? Explain in detail. I don't understand.

    asked by Evaldo on September 20, 2010
  24. physics

    A basketball is thrown at 45° to the horizontal. The hoop is located 4.5m away horizontally at a height of 1m above the point of release. What is the required initial speed?

    asked by applebottom on October 8, 2010
  25. Math

    Determine how much time is required for an investment to quadruple if interest is earned at a rate of 7.1% compounded continously. (no other info is given, and that's why I'm confused...)

    asked by Dee on May 31, 2010
  26. mgmt 303

    some people have claimed that the increasing technological sophistication required by many of today's corporations has led to a return to job specialization.

    asked by larry on September 20, 2010
  27. 9th grade american government

    What is required to become secretary of state? How it affects our govt? Job description? Salary? When 1st established? Where located? Why is it important?

    asked by nay on December 16, 2008
  28. calculus

    A rectangular closed box with a square base is to have a capacity of 27 cubic inches determine the least amount of material required.

    asked by gillian on April 27, 2016
  29. accounting

    An investment under consideration has a payback of five years and a cost of $1,200. If the required return is 20 percent, what is the worst-case NPV?

    asked by Rachel on September 15, 2007
  30. Intermediate Macroeconomics

    If the required reserve ratio is 12% and total reserves increase by $100, what is the maximum amount by which the money supply can expand?

    asked by Angelene on September 8, 2007
  31. phys chem

    how much energy (kj/mol) is required to break the hydrogen bond in water (Er=80.0) (Er= Relative permitivity) I'm really not sure how to approach this, and if i need enthalpies of vaporization or not...

    asked by Tom on February 8, 2015
  32. 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
  33. Physics

    Q69 Which of torque given below is required to change the angular momentum flywheel from 15kgm_2/s to 150kgm_2/s during a time interval of 5 sec?

    asked by Lara on September 29, 2018
  34. chemistry

    calculate the amunt of heat required to completely boil 250g of water starting from room temp 22 degrees C

    asked by Monique on December 6, 2011
  35. stoichiometry

    How many grams of Nitric oxide are required to produce 145g of nitrogen in this reaction: Al2O3(s)+6NO(g)---->5N2(g)+6H2o(l)

    asked by mandy on November 17, 2011
  36. chemistry

    How many grams of Nitric oxide are required to produce 145g of nitrogen in this reaction: Al2O3(s)+6NO(g)---->5N2(g)+6H2o(l)

    asked by mandy on November 16, 2011
  37. Math

    A box measures 60cm*52cm*40cm.find the area of the cardboards required to make 280 such boxes.

    asked by Simon on February 5, 2013
  38. Physics

    The constant torque required to accelerate a disk (of rotational inertia I) from rest to a speed of f rotations per second in a time interval of t is:

    asked by John on March 19, 2011
  39. Science

    How many minutes are required for a radio signal to travel from Earth to a space station on Mars if Mare is 7.83 x 10 to the 7th power km?

    asked by Margaret on October 8, 2012
  40. Physics

    A flywheel turns through 60 rev as it slows from an angular speed of 2.8 rad/s to a stop. How much time is required for it to complete the first 30 of the 60 revolutions?

    asked by Sara on March 6, 2017
  41. Chemistry

    How many moles of chloroform, CHCl^3, are required to fill a 253-ml flask at 100.0 degrees Celsuis and 940 torr?

    asked by Nick on March 14, 2011
  42. Chemistry

    Calculate the grams of solute required to make the following solutions. a)2500g of saline solution (0.90% NaCl (m/m)) b)0.050kg of 4.0% (m/m) MgCl2

    asked by Kim on April 27, 2010
  43. chem

    Calculate the mass of anhydrous sodium carbonate Na2Co3 required to prepare 2.5 litres of 0.50M aqueous solution.(Na=23,C=12,O=16)

    asked by sharon on September 29, 2015
  44. Chemistry

    Consider this reaction N2g+O2g+2NOg H=180.5kj How much heat would be required to produce 1.300 mol NOg?

    asked by Sarah on May 19, 2016
  45. Chem

    How would one calculate change in enthalpy only knowing heat capacities of all substances involved/required? at a known T... WOuld you use a multi-stepped pathway and if so, how?

    asked by Supaman on January 29, 2008
  46. chemistry

    What volume of 16M HNO3 is required to dissolve 0.50g of Cu metal in the following reaction? Cu(s) + 4HNO3(aq) ---> Cu(NO3)2 + 2H2O + 2NO2

    asked by Alex on February 3, 2011
  47. physics

    A basketball is thrown at 45° to the horizontal. The hoop is located 4.4 m away horizontally at a height of 1.1 m above the point of release. What is the required initial speed?

    asked by anna on September 27, 2014
  48. maths

    a verandha is 40m long and 15m it is paved with stone each measuring 6dm by 5 dm. find the number of stones required.

    asked by sehajjot on January 31, 2013
  49. Math

    You are required to design a QBASIC program that receives a student test score and prints out her grade, the grading criteria is as follows =90 is A.

    asked by QBasic on December 13, 2011
  50. Chemistry

    How many milliters of 1.80M HCl are required to react with 30.0 grams of calcium hydroxide according to the given equation: CA(OH)2(s) + 2HCl(aq)> CaCl2(aq) + 2H2O(l)

    asked by Elaine on April 3, 2011
  51. chemistry

    calculate the mass of oxalic acid dihydrate C2H2O4.2H2O required to react with 30 ml of 0.20 M sodium hydroxide solution?

    asked by lou on October 27, 2009
  52. physics

    What minimum strength of magnetic field is required to balance the gravitational force on a proton moving at speed 6 106 m/s?

    asked by Richard on December 5, 2011
  53. Chemistry

    if a cooler has 63 kg of ice how much energy is required to melt it at 0 degrees celcius? The heat fusion for water is 80 cal/gram

    asked by Ali on September 18, 2015
  54. chem

    What volume of benzene (C6H6,d=0.88g/ml,molar mass=78.11g/mol) is required to produce 1.5 x 10^3 kJ of heat according to the following reaction?

    asked by Melissa on November 18, 2013
  55. Chemistry

    calculate the amount of heat required to decompose 8 mol of NaHCO3(s) 2NaHCO3(s) + 94000 J = Na2CO3(s)+ H2O(g) + CO2(g)

    asked by Wesley on June 5, 2014
  56. Chem 2 Lab

    Calculate the volume of a 0.150 M NaOH solution that will be required to neutralize all of the H+ ions in 0.400 grams of phosphoric acid?

    asked by Lacey on April 25, 2012
  57. Physics

    The coefficient of kinetic friction for a 22 kg bobsled on a track is 0.15. What force is required to push it down a 6.0° incline and achieve a speed of 64 km/h at the end of 75 m?

    asked by Phil on October 2, 2011
  58. chemistry

    1.To make the following saline solution (375ml 0.5% w/v sodium chloride). I have weighed 1.875g of NaCl. What will be the volume of water that is required?

    asked by Christina on December 3, 2012
  59. Chemistry

    Assume that you found that the average volume of water required to fill the graduated cylinder to the 8.00 ml mark was 7.90 ml. What is the percent error?

    asked by Anonymous on September 9, 2013
  60. Physics

    What is the centripetal force required to cause a 4000 lb car to go around a curve of 900 ft radius and a speed of 600 miles per hour?

    asked by Ked on September 18, 2014
  61. spanish

    replace the underlined objects with the correct object pronoun . be sure to use se when it is required 1/ ayer mi mama compro un lapiz para mi

    asked by ally on February 15, 2015
  62. Math

    Hi, thanks for help in advance. Using the Equation: f(w) = 10/w - 0.77ln(w) – 3.2 How do i use Newton-Raphson iterative to find the required value of w correct to 3 significant figures, starting from w0 = 3. Thanks

    asked by Connor on February 15, 2015
  63. chemistry

    Al2O3(s)+6NO(g)---->5N2(g)+6H2O(l) how many grams of Nitric Oxide are required to produce 145g of nitrogen in the following reaction?

    asked by Mandy on February 27, 2012
  64. Chemistry

    Calculate the total mass of aluminum, with 90% purity, required to produce 448g of iron in the process Fe2O3 + 2 Al = Al2O3 + 2 Fe

    asked by Cindy on January 21, 2016
  65. chemistry

    A 40.0-mL sample of 0.100 M HNO2 is titrated with 0.200 M KOH. Calculate the volume required to reach the equivalence point (in mL)

    asked by dave on April 27, 2017
  66. physics

    What net torque is required to give a uniform 12-kg solid ball with a radius of 0.22m an angular acceleration of 12rad/s2 ?

    asked by help! on November 14, 2013
  67. chemistry

    What mass of lithium in grams is required to react completely with 57.9mL of N2 gas at STP? 6Li(s)+N2 (g)yields 2Li3N (s)

    asked by rusty on March 7, 2009
  68. Physics

    A 400 kg rocket sled can be accelerated at a constant rate from rest to 1600 km/h in 2.0 s. What is the magnitude of the required net force?

    asked by Joseph on October 8, 2010
  69. chemistry

    Zinc reacts with hydrochloric acid according to the reaction equation Zn(s)+2HCL(aq)=>ZnCl2(aq)+H2(g). How many mm of 1.50M HCL(aq) are required to react with 9.05 g of ZN?

    asked by Mimi on August 9, 2012
  70. Probability and statistics

    2. The standard deviation of the number of tosses required to get a 1 when a balanced dice is tossed repeatedly is equal to Choose one answer: a. √6 b. √30 c. 6 d. 30

    asked by Arun on March 2, 2012
  71. statistics

    12. Suppose we are estimating p and we have no prior estimate of p. Find the required sample size for a confidence level of 90% and a margin of error of 0.02.

    asked by ali awan on May 8, 2013
  72. physics

    The brakes on your automobile are capable of creating acceleration of 14 ft/s2. If you are going 66 mi/hr and suddenly see a state trooper, what is the minimum time required to get your car to 55 mi/hr?

    asked by Anonymous on September 1, 2014
  73. Chemistry

    The first order reaction has a rate constant of 3.0x10^-3 s^-1. The time required for the r eaction to be 75% complete is: 95.8s 201s 231s 462s 41.7s

    asked by Sam on February 22, 2008
  74. statistics

    A group of scientists is studying whether a new medical treatment has an adverse (bad) effect on lung function. Here are data on a simple random sample of 10 patients taken from a large population of patients in the study. Both variables are measurements,

    asked by Anonymous on August 17, 2013
  75. science Please Help

    1. A positively charged test object is moving toward the positive source charge in an electric field. What happens next??? A. its potential energy decreases. B. Its potential energy increases. C. Its potential energy stays the same. D. Its potential energy

    asked by HELP MEEEEE on December 4, 2014
  76. english

    1. It's sometimes difficult to balance family, friends, and to do school work, as well. family, and friends, and school work, as well.

    asked by Qua on October 16, 2015
  77. Physics

    A team is chosen to design an orbiting space station that is shaped like a wheel 5o meters in diameter with is mass of 4*10^5 kg contained in the rim portion of the wheel. The space station will rotate at a rate such that a person working in the wheel will

    asked by Malcom on April 23, 2009
  78. AP CHEM FULL ?

    This is part of a marathon problem, we have to identify the five compunds of H, N, and O described below. For each compound, I have to write a Lewis structure that is consistent with the information given. a.) All the compunds are electrolytes, although

    asked by Sam on December 2, 2006
  79. Biology

    The metabolic pathways of organism living today evolved over a long period of time- undoubtedly in a step wise fashion because of their complexity. Considering everything you have learned to date about the evolution of life on Earth, put the following in

    asked by Trinh on March 23, 2015
  80. calculus help thanks!

    The gas law for an ideal gas at absolute temperature T (in kelvins), pressure P (in atmospheres), and volume V (in liters) is PV = nRT, where n is the number of moles of the gas and R = 0.0821 is the gas constant. Suppose that, at a certain instant, P =

    asked by Pal on April 2, 2014
  81. chemistry

    use and activity series to Identify two metals that will not generate hydrogen gas when treated with and acid write balanced molecular equations: aluminum metal with dilute nitric acid Write balanced molecular equations:Calcium hydroxide solution with

    asked by Katie on April 14, 2008
  82. chemistry

    use and activity series to Identify two metals that will not generate hydrogen gas when treated with and acid write balanced molecular equations: aluminum metal with dilute nitric acid Write balanced molecular equations:Calcium hydroxide solution with

    asked by Katie on April 14, 2008
  83. Chem repost

    or the compound: carbon in the middle with 3 bonds -double bond to oxygen -bond to Mn(CO)5 -bond to CH3 group is the oxidation state of the metal +1? d count 6? total electron count 20? coordination number 7?

    asked by mary on February 5, 2009
  84. chem

    or the compound: carbon in the middle with 3 bonds -double bond to oxygen -bond to Mn(CO)5 -bond to CH3 group is the oxidation state of the metal +1? d count 6? total electron count 20? coordination number 7?

    asked by mary on February 5, 2009
  85. chemistry please

    or the compound: carbon in the middle with 3 bonds -double bond to oxygen -bond to Mn(CO)5 -bond to CH3 group is the oxidation state of the metal +1? d count 6? total electron count 20? coordination number 7?

    asked by mary on February 5, 2009
  86. chemistry help

    or the compound: carbon in the middle with 3 bonds -double bond to oxygen -bond to Mn(CO)5 -bond to CH3 group is the oxidation state of the metal +1? d count 6? total electron count 20? coordination number 7?

    asked by brian on February 5, 2009
  87. chemistry help

    for the compound: carbon in the middle with 3 bonds -double bond to oxygen -bond to Mn(CO)5 -bond to CH3 group is the oxidation state of the metal +1? d count 6? total electron count 20? coordination number 7?

    asked by brian on February 5, 2009
  88. Chemistry

    Implants carbon dioxide combined with water and energy to form glucose and oxygen gas. Right off the balance equation for this reaction. Glucose =C6H12O6. Given 78g of water. How many grams of glucose can be formed?

    asked by Deedra on March 13, 2018
  89. chem post

    or the compound: carbon in the middle with 3 bonds -double bond to oxygen -bond to Mn(CO)5 -bond to CH3 group is the oxidation state of the metal +1? d count 6? total electron count 20? coordination number 7?

    asked by mary on February 5, 2009
  90. physics

    A cylinder contains 3.5 L of oxygen at 350 K and 2.5 atm . The gas is heated, causing a piston in the cylinder to move outward. The heating causes the temperature to rise to 640 K and the volume of the cylinder to increase to 9.5 L. What is the gas

    asked by Isabel-A on November 23, 2010
  91. CHEMISTRY

    A compound which contains hydrogen, oxygen, carbon only has molar mass of about 85 g/mol. When 0.43 g of the compound is burned in excess of oxyfen, 1.10 g of CO2 and 0.45 g of H2O are formed. Find the molecular formula and the empirical formula of the

    asked by Clive Lodnyx on July 18, 2016
  92. Chemistry

    An unknown compound contains carbon, hydrogen, and oxygen. When burned, a 2.000 gram sample of this compound releases 3.451 g of carbon dioxide and 1.059 grams of water. What is the empirical formula of this compound? Thank you very much.

    asked by Mom on October 17, 2011
  93. Chemistry

    Draw structural formula for each reaction and state the type of reaction that is occuring: a. 4-nonene and fluorine gas b. hexane and oxygen gas c. pentanol and butanoic acid d. propene and hydrogen gas

    asked by Faro on April 8, 2011
  94. Chemistry

    Draw structural formula for each reaction and state the type of reaction that is occuring: a. 4-nonene and fluorine gas b. hexane and oxygen gas c. pentanol and butanoic acid d. propene and hydrogen gas

    asked by Faro on April 7, 2011
  95. Chemistry

    A sample of .234g of carbon is placed in a closed stainless steel bomb with .502g of of oxygen gas. The mixture is ignited giving of carbon dioxide. How many grams of carbon dioxide should be obtained upon combustion?

    asked by Ben on February 21, 2010
  96. history

    hi can someone please help me with these 5 questions. 1. One manifestation of the rising democratic tide in the 1830s was a. a general raising of the political tone b. use of national nominating conventions I think it's a but i don't know why it can't be B

    asked by phil on November 9, 2008
  97. Physics

    In the rough approximation that the density of the Earth is uniform throughout its interior, the gravitational field strength (force per unit mass) inside the Earth at a distance r from the center is gr/R, where R is the radius of the Earth. (In actual

    asked by Mehreen on April 5, 2011
  98. Chemistry

    You dissolve 5 g of calcium hydroxide in 2 liters of water. What is the molarity of the hydroxide ions in this solution? What is the molarity of the calcium ions in this solution?

    asked by Amanda on February 12, 2012
  99. Physics

    Find the center of mass of the carbon monoxide molecule , given that carbon has a mass of 12 u, oxygen has a mass of 16 u , and the two atoms are 0.111 nm apart.

    asked by Mattie on November 30, 2010
  100. physics

    Find the center of mass of the carbon monoxide molecule , given that carbon has a mass of 12 u, oxygen has a mass of 16 u , and the two atoms are 0.111 nm apart.

    asked by Mattie on November 30, 2010