1. physics

    The mass of a solid cube is 1200 g, and each edge has a length of 4.15 cm. Find the density of the cube. Answer in units of kg/m^3

    asked by Sid on August 25, 2013
  2. Chemistry

    A gas weighing 23.6 g occupies a 10.0 L flask at 27 C and 780. torr of pressure. Calculate the molar mass of the gas.

    asked by Ron on November 23, 2015
  3. Chemistry

    When the following reaction took place at 23.8 and a pressure of 758 torr, 3.9 L of o2 were collected. What mass of KCIO3 decomposed? KCIO3->KCI+O2

    asked by Sara on July 20, 2013
  4. Physics

    A rocket blasts off from rest and attains a speed of 42.3 m/s in 13.8 s. An astronaut has a mass of 70.2 kg. What is the astronaut's apparent weight during takeoff?

    asked by Jess on October 24, 2015
  5. chemistry

    An alpha particle (mass = 6.6 × 10-24 g) emitted by radium travels at 3.4 × 107± 0.1 × 107 mi/h. What is its de Broglie wavelength (in meters)?

    asked by brittany on March 25, 2010
  6. physics

    If a proton were traveling the same speed as electrons in a TV picture tube (about 7.2 107 m/s), what would its de Broglie wavelength be? The mass of a proton is 1.67 10-27 kg.

    asked by Anonymous on April 22, 2014
  7. Chemistry

    Determine the mass of each reactant needed to give 1.5 mol of HNO3 NO2(g)+H2O(l)---> HNO2(aq)+HNO3(aq)

    asked by Sandy on October 7, 2009
  8. science

    your mass is 90 kilograms. you are on the earth where the acceleration of gravity is measured at 9.8 meters/sec sec. What is your weight in Newton?

    asked by Ann on April 2, 2011
  9. physics

    A 1.92 kg cart and a 3.7 kg cart both slide toward each other at 1.34 m/s on an air track. They collide and stick. The combined mass moves at what speed in m/s

    asked by Anonymous on February 6, 2012
  10. science

    If 19:3 of iron ore (Fe2O3) reacts completely with carbon monoxide . Calculate the mass of iron Fe that is formed

    asked by banele on November 16, 2014
  11. physics

    A Piece of string 5.3-m long has a mass of 15.o g what must the tension in the string be to make the wavelength of a 125- Hz wave 120.0 cm

    asked by Anonymous on May 4, 2012
  12. Chemistry

    What is the mass in grams of copper chloride dihydrate (CuCl2·2H2O) required to prepare 80.0 mL of a 0.10 M CuCl2 solution?

    asked by John on October 20, 2018
  13. chemistry

    If 0.385 g of gas occupies a volume of 200 mL at -73 oC and 750 torr, what is the molecular mass of the gas? a) 21.4 b) 32.0 c) 44.0 d) 48.0 Someone can help me this answer please..?

    asked by Susie on April 18, 2010
  14. Chemistry

    How many grams of NaC2H3O2 (M=82.034 g mol-1) should be dissolved in 400 g of water to prepare a solution which is 11.28% NaC2H3O2 by mass?

    asked by Chris on February 12, 2009
  15. physics

    Suppose that a sled is accelerating at a rate of 2 m/s2. If the net force is tripled and the mass is doubled, then what is the new acceleration of the sled?

    asked by Chelsey Achord on December 3, 2012
  16. Chemistry

    What mass of lithium phosphate is needed to prepare 500.0 mL of a solution having a lithium ion concentration of 0.1385 M?

    asked by Chris on April 14, 2014
  17. physics

    A force of 1.35 newtons is required to accelerate a book by 1.5 meters/second2 along a frictionless surface. What is the mass of the book?

    asked by nimitz on February 1, 2013
  18. physics

    An elastic cord vibrates with a frequency of 3.5Hz when a mass of 0.62kg is hung from it.What is its frequency if only 0.40kg hangs from it?

    asked by Daniela on November 26, 2013
  19. Physics

    A 9500 kg boxcar traveling at 19 m/s strikes a stationary second car. The two stick together and move off with a speed of 10 m/s. What is the mass of the second car?

    asked by Davey on February 1, 2012
  20. chemistry

    Calculate the mass of Mg metal requied to consume 2560g of CO2 in the reaction 2Mg+CO2 → 2MgO + C

    asked by Anonymous on August 18, 2017
  21. science

    An automobile is pulled by a horizontal tow line, with a force of 900 N. If its acceleration is 1.0 m/s2, calculate the mass of the automobile.

    asked by tash on January 30, 2013
  22. chemistry II

    If a 2.15-g sample of gas occupies 750. mL at STP, what is the molar mass of the gas at 125 degrees celcuis

    asked by kris on February 3, 2011
  23. Chemistry

    2Na+F2=2NaF if 20.0 g of sodium is used what mass of sodium fluoride could be produced assuming that fluorine gas is unlimited

    asked by megan on May 1, 2012
  24. science

    guyz got a hard question... A net force of 10N to a 5 kg mass. bY HOW MUCH does a body accelerate.. Given: F=10N;m=5kg

    asked by Loraine Ordono on December 5, 2011
  25. physical science

    what is transferred by a force moving an object through a distance? a. force b. mass c. motion* d. energy please check my answer

    asked by a'ny on February 23, 2018
  26. Chemistry

    Calculate the mass in grams for a gold sample that absorbs 245J to change its temperature from 19 degrees to 49 degrees

    asked by Wendy on March 5, 2011
  27. Chemistry

    What is the mass if solute dissolved in the indicated volume of each of the following solutions? (b) 4.25 L of 0.450 M KIO4g (c) 60.0 mL of 0.310 M ZnSO4g (d) 60.0 mL of 0.310 M Ni(NO3)2g

    asked by Harry on March 26, 2014
  28. chemistry II

    If a 2.15-g sample of gas occupies 750. mL at STP, what is the molar mass of the gas at 125 degrees celcuis

    asked by kris on February 3, 2011
  29. Physics

    A rocket blasts off from rest and attains a speed of 53.8 m/s in 17.4 s. An astronaut has a mass of 67.2 kg. What is the astronaut's apparent weight during takeoff?

    asked by Hannah on October 22, 2015
  30. science

    a car of mass 900 kg moves at 10 m/s. what is the braking force required to stop the car in a time of 5 seconds?

    asked by anonymous on June 29, 2009
  31. physics

    How long would our year be if our Sun were two fifths its present mass and the radius of the Earth’s orbit were six times its present value?

    asked by erin on May 6, 2010
  32. welkin

    a block of mass 50kg just slide distance of one metre if the coefficient of friction between their surface is 0.2,then work done against friction is

    asked by iqbal on September 29, 2015
  33. Physicis

    A mass of gas occupies 20cm at5c and 760mmhg pressure what is its volume at30c and800mmhg pressure .

    asked by Chidera on April 23, 2016
  34. Chem II

    What mass of PbI2 can be formed from 75.0 mL of 0.65 M NaI by adding excess Pb(NO3)2? Pb(NO3)2 + 2NaI ---> PbI + 2NaNO3

    asked by Ken on February 5, 2008
  35. chemistry

    Calculate the mass of ethanol required to heat 200mL of water from 21 degrees celcius to 45 degress celcius

    asked by Kate on November 9, 2010
  36. physics

    A rocket blasts off from rest and attains a speed of 59.4 m/s in 14.1 s. An astronaut has a mass of 66.7 kg. What is the astronaut's apparent weight during takeoff?

    asked by S on September 28, 2014
  37. physical science

    The force of gravity acting on a body is 675 newtons. find the mass of the body to the nearest kilograms.

    asked by Anonymous on May 20, 2015
  38. chemistry

    A 100.0 ml aqeuous solution that contains 0.50 g of hemoglobin has an osmotic pressure of 0.00178 atm. What is the molar mass of hemoglobin?

    asked by victoria on February 16, 2015
  39. Ap Chemistry.

    Zn + 2HCl -> ZnCl2 + H2 If 7.29 g of Zinc reacted, how many liters of HCl were used? I know that i can't use mass volume conversion, because the HCl is not a gas...so what do i do?

    asked by Chris on October 25, 2010
  40. Chemistry

    6.00 g of hemoglobin was dissolved in 250.0 mL of solution. The resulting osmotic pressure was 6.80 mmHg at 23.0C. what is the molar mass of hemoglobin?

    asked by libby on June 10, 2018
  41. chemistry

    a 1.00*10^1 mL sample of an unknown liquid has a mass of 7.99 g. Calculate the density of the liquid using the proper number significant figures

    asked by mike on January 28, 2015
  42. chemistry

    What mass of hydrogen peroxide should result when 1.50g of barium peroxide is reacted with 25.0mL of 0.50 M hydrochloric acid?

    asked by confused on December 13, 2011
  43. chem 1046

    Calculate the boiling point a. 10.5 g FeCl3 in 2.11 102 g water b.4.6% KCl by mass (in water) c.0.140 m MgF2

    asked by Anonymous on July 6, 2012
  44. Chemistry

    Find the mass of urea (CH4N2O) needed to prepare 50.9 g of a solution in water in which the mole fraction of urea is 7.69×10−2.

    asked by Nicole on February 24, 2016
  45. chem

    A block of metal has a width of 3.2cm, a length of 17.1cm, and height of 3.6 cm. Its mass is 1.3 kg. Calculate the density of the metal.

    asked by jake on September 7, 2011
  46. chemistry

    A scientist collects a sample of carbon dioxide that contains 1.5 x 1025 molecules of CO2. In grams, what is the mass of the sample?

    asked by Antonio on December 20, 2011
  47. Chemistry 101

    A gaseous compound has a density of 0.355 g/L at 17 degree celcius and 189 mmHg. What is the molar mass of the compound?

    asked by Eunice on April 30, 2009
  48. chemistry

    Determine the mass of hydrogen gas if 36g of water undergoes electrolysis to produce hydrogen and oxygen.

    asked by Duhe on March 1, 2010
  49. chemistry

    Determine the mass of hydrogen gas if 36g of water undergoes electrolysis to produce hydrogen and oxygen.

    asked by Duhe on March 1, 2010
  50. chemistry

    Determine the mass of hydrogen gas if 36g of water undergoes electrolysis to produce hydrogen and oxygen.

    asked by Duhe on March 1, 2010
  51. Physics problem.. :/

    A 8.7 kg block is on a frictionless surface. It is connected by a string over a pulley to a 8.6 kg hanging mass. Find the acceleration of the block. ?

    asked by Kat on November 17, 2011
  52. Chemistry

    15.0 mL of 0.30 M sodium phosphate solution reacts with 20.0 mL of 0.23M lead(II) nitrate solution. What mass of precipitate will form?

    asked by Andy on September 28, 2014
  53. physics

    A moving object has a kinetic energy of 133 J and a momentum with magnitude of 39.8 kg·m/s. Detemine the mass (kg), and velocity (m/s) of the object.

    asked by justin on May 19, 2011
  54. chems

    A cubic piece of metal measures 7.50cm on each edge. If the metal is nickel, whose density is 8.90 {\rm g/cm}^3, what is the mass of the cube?

    asked by jason on September 3, 2012
  55. Physics

    A crate has a mass of 27 kg. What applied force is required to produce an acceleration of 3 m/s2 if the frictional force is known to be 98 N? I am confused on how to solve this.

    asked by Anonymous on September 3, 2012
  56. Chemistry

    A piece of metal with a mass of 131 g is placed in a 50 mL graduated cylinder. The water level rises from 20. mL to 35 mL. What is the density of the metal?

    asked by Lean brow on September 5, 2016
  57. Physics

    A constant force of 35.9 N, directed at 28.7o from horizontal, pulls a mass of 14.7 kg horizontally a distance of 3.41 m. Calculate the work done by the force.

    asked by Kristen on October 20, 2013
  58. Physics

    A constant force of 35.9 N, directed at 28.7o from horizontal, pulls a mass of 14.7 kg horizontally a distance of 3.41 m. Calculate the work done by the force.

    asked by Kristen on October 20, 2013
  59. sdfghj

    a certain force acting on a body of mass 2 kg increases it's velocity from 6m/s to 15m/s in 2 seconds . the work done by the force during this interval is ?

    asked by bh on November 11, 2011
  60. Chemistry

    The compound A1B2 (molar mass = 132) has a solubility of 13 g/L. Calculate the Ksp for this compound. I'm stuck on this question, please help?

    asked by Adrianna on April 3, 2011
  61. Chemistry

    The density of oak lumber is approximately 800km/m^3. What is the mass in grams of 4 cubic meters of oak? And the work.

    asked by Maryanne on September 30, 2010
  62. physical science

    a car of mass 900 kg move at 10 m/s. What is the braking force required to stop the car in a time of 5 seconds?

    asked by jake on February 11, 2008
  63. physics

    A rocket blasts off from rest and attains a speed of 58.9 m/s in 14.4 s. An astronaut has a mass of 57.5 kg. What is the astronaut's apparent weight during takeoff?

    asked by Maddie on October 28, 2014
  64. chemistry

    Find the mass of barium metal (in grams) that must react with O2 to produce enough barium oxide to prepare 1.1 L of a 0.10 M solution of OH^ -.

    asked by Jessica on February 19, 2011
  65. Chemistry

    If the density of carbon is 3.51 g/cm3, and you have a small diamond (pure carbon) that has a mass of 0.0270 grams, what is the volume?

    asked by Courtney on September 4, 2016
  66. physics

    An automobile that has a mass of 1.3 x 103 Kg, has 3.9 x 105 J of kinetic energy when it has speed of 24.6 m s-1 (88.6 km h-1). What height should you lift the car to have this energy?

    asked by Sammie on January 17, 2017
  67. Physical Science

    How much work is needed to lift an object with a mass of 51.0 kg to a height of 2.00 meters?  Calculate your answer in Joules Answer

    asked by Anonymous on February 26, 2012
  68. physics

    A small plane starts down the runway with acceleration 7.4 .if the force provided by its engine is 1.5×104 , what is the plane's mass?

    asked by Anonymous on June 25, 2011
  69. Chemistry

    Calculate the mass ( g ) of the solute acetonitrile and the volume ( L ) of the solvent C6H6 that should be mixed to produce 4.72 kg of a solution that is 1.34 m acetonitrile.

    asked by Tylor on May 4, 2009
  70. chemistry

    What is the density of CH4 gas at 32.7 degree celsius and 109kPa? The molar mass of CH4 is 16.042g/mol.

    asked by jin on February 24, 2014
  71. physics

    A ball of mass 0.50 kg is thrown vertically upwards, calculate the net force on the ball at the top of its flight

    asked by Duy on March 20, 2016
  72. Physics

    A body of mass 100kg is released from a height of 200m .with what energy does the body strikes the ground (take g=10m/s)

    asked by Ola on November 13, 2018
  73. chemistry

    How many grams of NaOH are contained in 5.0 × 102 mL of a 0.77 M sodium hydroxide solution? The molar mass of NaOH is 40.0 g/mol.

    asked by Dystinee on October 15, 2014
  74. chem

    How many grams of CaCl2 (molar mass = 111.0 g/mol) are needed to prepare 4.44 L of 0.500 M CaCl2 solution?

    asked by jann on May 15, 2011
  75. chem

    At normal temperature and pressure, air has a density of 0.001184 g/mL. What is the mass of air in a room that is 3.71 m by 3.60 m by 2.51 m? Answer in units of kg

    asked by holy on August 28, 2012
  76. physics

    A 9600 kg boxcar traveling at 15 m/s strikes a stationary second car. The two stick together and move off with a speed of 7.0 m/s. What is the mass of the second car?

    asked by Anonymous on March 7, 2010
  77. Science

    A body of mass 10kg is acted upon by a constant force 20N for 3secs. Calculate the K.E gained by the body.

    asked by Chinyere on May 2, 2016
  78. science

    okay can someone explain what conservation of mass is to me? my teacher told us but wasn't clear. i had a test with it in today so i want to know so i can tell my teacher i do understand it now.

    asked by minka on February 26, 2010
  79. physics

    discuss the relationship of the following variables with the centripetal force: a.)radius of revolution b.)mass of the object c.)speed of revolution.

    asked by zianna on September 18, 2012
  80. chemistry

    A solution of sulfuric acid in water that is 25% H2SO4 by mass has a density of 1178 g/ml. Which expression gives the molarity of this solution?

    asked by help on November 16, 2011
  81. Chem

    The molar weight of MgSO4 is 120.366gmol-1. What is the mass/volume percentage of a 2.5M water solution of MgSO4?

    asked by James on May 27, 2013
  82. Physics

    A block on a spring moves in SHM with amplitude 0.23 m and period 3.8 s. The mass of the block is 2.1 kg. What is the total energy of the system?

    asked by Jamie on June 24, 2012
  83. chemistry

    An alpha particle has a mass of 6.6*10-24 g travels at 3.4*107 +/- 0.1*107 mi/h a. What is the DeBroglie wavelength (in meters)? b. What is the uncertainty in position?

    asked by Brittany on December 2, 2009
  84. physics

    If the mass of a cart full of groceries decreases to half and, at the same time, its speed doubles, the momentum of the cart?

    asked by Anonymous on November 5, 2010
  85. Chemistry

    What volume (mL) of the solvent benzene should be added to 142 mL of the solute CH3CN to generate a solution that is 2.68% by mass CH3CN?

    asked by Scott on September 2, 2008
  86. Physics

    Which exerts more gravitational force on the baby, Mars or the obstetrician, given that Mars has a mass of 6.4 1023 kg and is 8. 1010 m from Earth?

    asked by George on April 10, 2013
  87. Physics

    A firefighter with a mass of 52 kg slides down a vertical pole with an acceleration of 3 m/s/s . The acceleration of gravity is 10 m/s/s. What is the friction force that is acting on him

    asked by Davis on October 30, 2014
  88. Science

    A hydrochloric acid solution consist of 28.0% HCl, by mass, and has a density of 1.14 g/mL. What volume of this solution is required to react with 1.35 g Al?

    asked by Vishea on June 22, 2018
  89. chemistry

    Give the number of chloride ions in 11.1g of calcium chloride.(Mr=molar mass) n=m/Mr=11.1/110.98=0.100moles of CaCl2 Please help!

    asked by Anonymous on September 10, 2008
  90. Chemistry

    the freezing point of a water solution containing 26.1g of a non electrolyte in 538g of water is 0.73°C. what is the molar mass of the solute Thank you in advance

    asked by Mika Reyes on March 20, 2017
  91. Chemistry

    Given that KH for CO gas at 25 OC is 9.71 x10-4 mol.L-1.atm-1. Calculate the mass of CO that would dissolve in 1.00 L of H2O if the partial pressure of CO is 1.38 atm.

    asked by Chelsea on February 15, 2011
  92. Physics

    Planet Jupiter revolves around the Sunin 12 years (3.79 X 10^8 sec. What is its mean distance from center of Sun? mass of sun is 1.99 x 10^30 kg.

    asked by Christine on June 17, 2012
  93. 9th grade

    An uknown substance from planet x has a density of 10g/ml.it occupies a volume of 80ml. what is the mass of this unknown substance

    asked by gasharee on September 27, 2010
  94. 9th grade

    An uknown substance from planet x has a density of 10g/ml.it occupies a volume of 80ml. what is the mass of this unknown substance

    asked by gasharee on September 27, 2010
  95. chemistry

    A mixture of 16 g of salt and 47 g of baking soda is poured into 296 ml of water. What is the total mass of the mixture in grams?

    asked by Vivian on June 14, 2012
  96. chemistry

    Calculate the mass of HCl required to prepare 2.5 liters of a 0.08 molar solution of HCl. H 1.01 Hydrogen 17 Cl 35.45 Chlorine

    asked by archie on September 26, 2011
  97. physics

    a girl of mass 40 kg is skating at a constant speed of 1 m/s. supposed she doubles her speed, what will be the change in her kinetic energy?

    asked by Anonymous on January 25, 2011
  98. Physics

    A hamster is pushed off a cliff by wind. Its mass is 0.040 kg and has a Potential Energy of 98 J. Find the kinetic energy...

    asked by Anonymous on November 11, 2016
  99. Physics

    A hamster is pushed off a cliff by wind. Its mass is 0.040 kg and has a Potential Energy of 98 J. Find the kinetic energy.

    asked by Bob on November 11, 2016
  100. chemistry

    Calculate the molar mass of a non-electrolyte that lowers the freezing point of 25.0 g of water to - 3.9 oC when 4.27 g of the substance is dissolved in the water.

    asked by Danica on October 1, 2012

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