1. Chemistry

    What mass of silver nitrate is dissolved in 40.0 mL of a 0.400 M solution of silver nitrate?

    asked by Ivy on December 6, 2010
  2. Chemistry

    What mass of sulfur must be used to produce 12.6L of sulfur dioxide (SO2) at STP? S8 + O2  SO2

    asked by Donovan on January 12, 2016
  3. unknown

    The density of platinum is 23.4 g/cm3 at 20°C. Calculate the mass of 75.0 cm3 of platinum at this temperature.

    asked by Anonymous on August 15, 2013
  4. chemistry

    If a sample of pure cadmium has a mass of 18.2 grams, how many moles of cadmium are in the sample?

    asked by hippie on November 14, 2010
  5. chemistry

    You have a 1 L container of a gas O 2 at 20°C and 1 atm. Subtracting the weight of the container, what is the mass of the gas?

    asked by david on April 6, 2012
  6. science

    Substance shaped in a cube of length 2 cm. The cube's mass is 24 g. What is the density of this substance?

    asked by Chase on November 18, 2008
  7. chemistry

    A solution contains 5.00% (by mass)NaCl. The density of the solution is 1.064 g/cm^3. What is the molarity of NaCl?

    asked by evelyn on November 19, 2012
  8. Chemistry

    The density of platinum is 23.4 g/cm cubed. Calculate the mass of 75.0cm cubed of platinum.

    asked by Sparkle on September 25, 2012
  9. Chemistry

    A solution of concentrated NaOH is 16.4 M. If the density of the solution is 1.43 g/mL what is the percent by mass NaOH?

    asked by Olivia on May 12, 2016
  10. Physics

    A 447.5-N force accelerates a go-cart and its driver from 10.3 m/s to 16.7 m/s in 4.01 s. What is the mass of the go-cart plus driver?

    asked by Jessica on February 2, 2015
  11. chemistry

    A chemist wants to make 5.5 L of a 0.250 M CaCl2 solution, what mass of CaCl2 (in g) should the chemist use?

    asked by Lisa on November 20, 2010
  12. physics

    i posted this earlier but am now stuck on getting through the algebra 1. The problem statement, all variables and given/known data 13) (II) At what distance from the Earth will a spacecraft on the way to the Moon experiance zero net force due to these two

    asked by Jake on December 23, 2009
  13. Physics

    In a game of pool the cue ball strikes another ball of the same mass and initially at rest. After the collision the cue ball moves at 3.50 m/s along a line making an angle of 22 degrees with its original direction of motion. and the second ball had a speed

    asked by Nat on March 8, 2007
  14. college student

    Two spheres of mass 2 kg and 3 kg are attached to the ends of a light rigid rod of length 1.0 m. What is the moment of inertia of the system about an axis perpendicular to the rod and (i) passes through the centre of the rod (ii) passes through the 2 kg

    asked by saalim on December 16, 2014
  15. chemistry

    1 the mass of one mole of electron is ...... mg. 2 copper(I) ions contains .......... electrons in its 3rd orbitals 3 if both K and L shells of an atom are full,what is the total number of electrons contained in them? 4 what is maximum number of electrons

    asked by pooja on May 4, 2012
  16. Chemistry

    5.00 liter steel cylinder is filled with water vapor at 100 °C and 650 mm Hg. Determine the mass of water that condenses to a liquid when the closed system is cooled to 20 °C. The vapor pressure of water at 20 °C is 18 mm Hg. 6.

    asked by Anonymous on July 12, 2011
  17. physics

    a uniform beam 6.0 metre long and weighing 4kg rests on support at p and q placed left and right 1.0 metres from each end of the beam weights of mass 10 kg and 8kg are placed near p and q respectively one each end of the beam.calculate the reaction at p

    asked by mary on February 1, 2016
  18. chemistry

    Acids and bases • What is an acid? • A 500cm3 solution containing 1.9g of a weak acid HA has a pH of 3.50. Calculate the molar mass of the acid, given that it has a Ka of 2.0 × 10-6moldm-3 • Calculate the pH of the following: • 0.002moldm-3 NaOH

    asked by chansa on June 7, 2016
  19. physics

    A woman is 1.6 m tall and has a mass of 47 kg. She moves past an observer with the direction of the motion parallel to her height. The observer measures her relativistic momentum to have a magnitude of 2.2 × 1010 kg·m/s. What does the observer measure

    asked by please help on April 4, 2013
  20. physics

    a force of 20n applied parallel to the surface of a horizontal table is just sufficient to make a block of mass 4.kg move on the table caculate thd coefficient of friction between the block and the table

    asked by fawaz on October 26, 2011
  21. college subject=chemistry

    Q#2..96g of sulphur reacts with 36g of carbon according to the following equation and produces carbon disulphide 2S + C = CS2 (a) the mass of carbon disulphide (b) the excess amount of the reagent in grams that is left unreacted.

    asked by sadia salem on July 24, 2017
  22. math

    1. Two children balance a see-saw in horizontal equilibrium. One weighs 80 lb. and the other weighs 60 lb. and is sitting 4ft. from the fulcrum. Find the force the fulcrum applies to the beam and the distance to the fulcrum to the 80 lb. child. (Neglect

    asked by gaurav on October 29, 2011
  23. chemistry

    Q#2..96g of sulphur reacts with 36g of carbon according to the following equation and produces carbon disulphide 2S + C = CS2 (a) the mass of carbon disulphide (b) the excess amount of the reagent in grams that is left unreacted.

    asked by sadia salem on July 24, 2017
  24. PHYSICS

    A woman is 1.6 m tall and has a mass of 47 kg. She moves past an observer with the direction of the motion parallel to her height. The observer measures her relativistic momentum to have a magnitude of 2.2 × 1010 kg·m/s. What does the observer measure

    asked by please help on April 3, 2013
  25. math

    1. Two children balance a see-saw in horizontal equilibrium. One weighs 80 lb. and the other weighs 60 lb. and is sitting 4ft. from the fulcrum. Find the force the fulcrum applies to the beam and the distance to the fulcrum to the 80 lb. child. (Neglect

    asked by gaurav on October 29, 2011
  26. physics

    A tow truck is connected to a 1500 kg car by a cable that makes a 27 degree angle to the horizontal. If the truck accelerates at 0.58 m/s^2, what is the magnitude of the cable tension? Neglect friction and the mass of the cable.

    asked by ian on April 1, 2012
  27. Physics:upward acc of earth

    If the Earth's gravitational force causes a falling 93 kg student to accelerate downward at 9.8 m/s2, determine the upward acceleration of the Earth during the student's fall. Take the mass of the Earth to be Mearth = 5.98 x 1024 kg. Answer in units of

    asked by HELP ME!! on April 20, 2010
  28. physics

    a force of 20n applied parallel to the surface of a horizontal table is just sufficient to make a block of mass 4.kg move on the table caculate thd coefficient of friction between the block and the table

    asked by fawaz on October 26, 2011
  29. Physics

    An electron and a proton are each placed at rest in an electric field of 363 N/C. What is the velocity of the electron 76.1 ns after being released? Consider the direction parallel to the field to be positive. The elementary charge is 1.60218 × 10 −19

    asked by Mary on February 17, 2012
  30. physics

    Approximately what force, FM, must the extensor muscle in the upper arm exert on the lower arm to hold a 7.9 kg shot put (Fig. 9-66)? Assume the lower arm has a mass of 2.8 kg and its CG is 11.2 cm from the pivot point.

    asked by kwame on November 16, 2009
  31. Chemstry

    Mercury concentration in a polluted lake is 0.0125 micrograms/L. What is the total mass in kilograms of mercury in the lake if the lake is approximately circular witha diameter of 10 miles and an average depth of 50 ft.?

    asked by Gabrielle on August 31, 2011
  32. physics

    a body is pulled over a surface by applying 20 Newton making an angle 60 degree with the horizontal.if the body moves with constant speed on a rough surface on which coefficient of friction is .4 then the mass of the body is?

    asked by hanan on July 20, 2014
  33. Physics

    A box with a mass of 4.0kg is sitting on a plane angled at 60degrees above the horizontal. The coefficient of friction between the box and the plane is 0.3. What is the horizontally applied force necessary to stop the box from sliding down the ramp?

    asked by Jared on January 2, 2011
  34. physics

    A Titan IV rocket has put your spacecraft in a circular orbit around Earth at an altitude of 230 km. Calculate the force due to gravitational attraction between the Earth and the spacecraft in N if the mass of the spacecraft is 2300 kg.

    asked by peter on October 25, 2014
  35. Physics

    A sphere of mass 85 kg is attached to one end of a rope as shown in the figure below. It is found that the rope does an amount of work W = 8030 J in pulling the sphere upward through a distance 9.6 m. Find the tension in the rope.

    asked by Sierra on July 6, 2012
  36. Physics

    What is the total amount of potential energy that can be stored in a 10,000 gallon water tower built with the water tank 61.50 m above ground level?

    asked by Matt on February 14, 2017
  37. chemistry

    What is the percent by mass of H in ethyl alcohol (C2H6O)? The molecular weight of carbon is 12.0107 g/mol, of hydrogen 1.00794 g/mol, and of oxygen 15.9994 g/mol. Answer in units of % Your answer must be within ± 0.1%

    asked by tyeisha colley on January 29, 2012
  38. chemistry

    Treatment of gold metal with BrF3 and KF produces Br2 and KAuF4, a salt of gold. Find the mass of the gold salt that forms when a 73.0 -g mixture of equal masses of all three reactants is prepared.

    asked by john on November 2, 2010
  39. Chemistry

    Zn(s) + 2HCl(l) ---> ZnCl2(s) + H2(g) at STP What mass of zinc is needed to produce 115 mL of hydrogen? 0.115L/22.4L/mol = 0.0051 moles H2 gas 0.0051 mol x 65g/mol = 0.33 grams

    asked by Shine bright shine far on March 4, 2019
  40. Physics

    A woman is 1.6 m tall and has a mass of 53 kg. She moves past an observer with the direction of the motion parallel to her height. The observer measures her relativistic momentum to have a magnitude of 2.6 x 1011 kg·m/s. What does the observer measure for

    asked by Beth on July 21, 2012
  41. AP Physics

    A 2.8 kg mass hangs at one end of a rope that is attached to a support on a railroad car. When the car accelerates to the right, the rope makes an angle of 9.0° with the vertical, as shown in Figure P4.68. Find the acceleration of the car.

    asked by Frank on October 5, 2010
  42. physics

    A shot-putter throws the shot ( mass = 7.3 kg) with an initial speed of 15.0 m/s at a 33.0 degreCalculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 1.90 m above the ground.e angle to the horizontal.

    asked by Emma on October 12, 2011
  43. college chem

    sodium sulfide, Na2S, is used in the leather industry to remove hair from hides. The Na2SO4 + 4C -> Na2S +4CO(g) so suppose you mix 15(g) of Na2SO4 and 7.5g of C. which is the limiting reactant AND what is mass of Na2S that is produced?

    asked by cheryl on October 9, 2011
  44. Physics

    A .324 kg air track glider moves linearly with an initial speed of 1.37 m/s.In order to increase the speed of the mass, 7.31 J of work are done. What is the final speed of the glider? (Ignore the negligible friction)

    asked by Anonymous on January 26, 2017
  45. Chem

    An antifreeze solution is prepared containing 40.0 g of ethylene glycol (molar mass = 62.0 g/mol) in 60.0 g of water. Calculate the freezing point of this solution. Which calculation is it? A. 120.1⁰C B. -20.1⁰C C. 0.518 ⁰C D. 20.1⁰C

    asked by Cherry on August 8, 2016
  46. Physics

    A uniform beam 6m long weighing 4kg rests on supports p and q placed left and right 1metre from each end of the beam. Weight of mass 10kg and 8kg are placed near p and q respectively one each end of the beam. Calculate the reactions at p and q.

    asked by Emmanuel on November 18, 2018
  47. Physics

    A 9 kg block on a frictionless inclined plane at 40° has a cord attached to a pulley of mass 4 kg and radius 11 cm (see the following figure). (a) What is the acceleration of the block down the plane (in m/s2)? (Enter the magnitude.) (b) What is the work

    asked by Haya on April 15, 2017
  48. Physics

    You are pulling a crate across the floor. The crate has a mass of 75.0 kg. You exert a horizontal force of 120. N to the left. Friction exerts a force of 82.0 N to the right. What is the magnitude (fill in box) and direction of the acceleration of the

    asked by Josie on February 5, 2014
  49. physics

    A child is pulling a sled across a horizontal surface by a rope that makes a 27.5 degree angle with the ground. The child pulls with a force of 32.7 N and the total mass of the sled is 23.5 kg. Find the weight of the sled.

    asked by Michael on January 7, 2015
  50. physics

    A spring gun is made by compressing a spring (assumed to be perfect) and latching it. A spring of constant k = 60 N/ m is used and the latch is located at a distance of 7 cm from equilibrium. The pellets have mass 4 g. What is the muzzle velocity of the

    asked by Nazgul on March 8, 2011
  51. math

    1. Two children balance a see-saw in horizontal equilibrium. One weighs 80 lb. and the other weighs 60 lb. and is sitting 4ft. from the fulcrum. Find the force the fulcrum applies to the beam and the distance to the fulcrum to the 80 lb. child. (Neglect

    asked by rahul on October 29, 2011
  52. physics

    A solid ball of radius b and mass m is released from the top of an incline of the incline is at the height h above the ground. If the ball rolls without slipping, what willl be its linear speed when it reaches the botton of the incline?

    asked by pakilina on November 25, 2011
  53. chemistry

    4. A sulfuric acid solution containing 571.6 g of H2SO4 per liter of solution has a density of 1.329 g/cm3 . Calculate a. The mass percentage b. The mole fraction c. The molality d. The molarity of H2SO4 in this solution

    asked by Steph on February 5, 2015
  54. physics

    A mass is attached to a horizontal spring and compresses the string by 10 cm (position A). when it is released, it bounces back and stretches the spring by 10 cm (position B). Compare the potential energies at position A and B. The choices are 1). A>B, 2)

    asked by Sarah on June 14, 2017
  55. physics

    Two ping pong balls each have a mass of 1.4 grams and carry a net charge of 0.450uC. one ball is held fixed. at what height should the second ball be placed directly above the fixed ball if it is to remain at rest there?

    asked by jamal puritt on January 22, 2014
  56. 12th grade math

    a block of mass 77kg is placed at the top of a frictionless plane that is inclined 46degrees to the horizontal. The height of the plane is 23 meters. find the speed of the block at the bottom of the plane. Show the steps please, -thanks

    asked by frusterated on June 11, 2012
  57. science

    A uniform beam 6m long and weighing 4kg rest on support p and q placed left and right 1m from each end of the beam. Weight of mass 10kg and 8kg are placed near p and q respectively. On ecah end of the beam. Calculate the reation at p and q

    asked by david on August 5, 2011
  58. science

    a man throws a ball of mass 0.5kg vertically upwards with a velocity of 25 m/s.find:[a}the initial momentum of the ball{b}momentum of the ball at the half way mark of the maximum height {given g=10 m/s square}

    asked by mansi on September 7, 2014
  59. Physics

    A force of 20N applied parallel to the surface of a horizontal table,is just sufficient to make a block of mass 4kg move on the table.calculate the coefficient of friction between the block and the table.

    asked by Jeremiah on February 11, 2012
  60. physics

    A uniforbm beam 6m long weighing 4kg rest on supports at p and q placed left and right 10m from each end of the beam weights of mass 10kg and 8kg are placed near p and q respectively on each end of the beam . calculate the reactions at p and q ?

    asked by debbie on January 20, 2013
  61. physics

    An elevator in a tall building is allowed to reach a maximum speed of 3.0 m/s going down. What must the tension be in the cable to stop this elevator over a distance of 2.4 m if the elevator has a mass of 1500 kg including occupants? Need step by step help

    asked by Anonymous on May 3, 2010
  62. Physics

    A train has a mass of 5.27E+6 kg and is moving at 53.9 km/hr. The engineer applies the brakes, which results in a net backward force of 1.30E+6 N on the train. The brakes are held on for 25.6 s. What is the new speed of the train? How far does it travel

    asked by Kimmy on September 22, 2013
  63. physics

    Take the mass of the Earth to be 5.98 × 1024 kg. If the Earth’s gravitational force causes a falling 52 kg student to accelerate downward at 9.8 m/s2, determine the upward accelera- tion of the Earth during the student’s fall. Answer in units of m/s2.

    asked by todd on November 28, 2010
  64. newton's law

    A block of mass M is projected up a frictionless inclined plane with a speed VO. The angle of incline is given as theta. a. How far up the plane does it go? b. How much time does it take to get there? I was stuck after Fg(cos(theta+90)= Ma_x

    asked by jack on October 13, 2012
  65. physics

    A 50 kg boy picks up a 11 kg stereo and raises it 0.75 m from the floor to a tabletop. How much work did he do on the stereo? How much work did he do to raise his own center of mass 0.40 m in the process? I'm assuming you use W=mgy equation but do you

    asked by Leah on October 9, 2010
  66. Physics

    A spring is hung from a ceiling, and an object attached to its lower end stretches the spring by a distance of 5.00 cm from its unstretched position when the system is in equilibrium. If the spring constant is 54.1 N/m, determine the mass of the object.

    asked by Anonymous on December 5, 2010
  67. ohy

    Carts of mass 3 kg and 10 kg move on a frictionless horizontal track with speeds of 4 m/s and 3 m/s, respectively. The carts collide and stick together. Find: a) The velocity of the carts just after collision. b) The loss of kinetic energy due to the

    asked by killi on January 26, 2014
  68. chemistry

    determine the volume of stock acid required to prepare 500mL of 0.5mol/L hydrochloric acid. Assume the stock acid is 38% by mass hydrogen chloride and has a density of 1190kg/m3 (1.190g/mL)

    asked by sara on May 30, 2010
  69. Physics

    Sam, whose mass is 80kg , takes off across level snow on his jet-powered skis. The skis have a thrust of 220N and a coefficient of kinetic friction on snow of 0.1. Unfortunately, the skis run out of fuel after only 8.0s .

    asked by Anonymous on October 1, 2012
  70. math

    A liquid spray of mass 384 g is packed in a cylindrical container of internal radius 3.2cm. Given that the density of the liquid is 0.6g/cm3, calculate to 2 decimal places the height of liquid in the container.

    asked by kudu on February 15, 2015
  71. Physics

    Approximately what force, FM, must the extensor muscle in the upper arm exert on the lower arm to hold a 6.9 kg shot put (Fig. 9-66)? Assume the lower arm has a mass of 2.8 kg and its CG is 13.0 cm from the pivot point.

    asked by Anonymous on December 10, 2010
  72. Chemistry

    The percent is confusing me, can you please help me set this equation up. How much heat is liberated when 5.00 kg of coal is burned if the coal is 96.2% carbon by mass and the other materials in the coal do not react? (delta)H comb of carbon is -394kJ/mol

    asked by Syd on August 3, 2015
  73. Physics

    A helicopter has a mass of 4280kg. The helicopter is lifted off the ground with a vertically upward acceleration of 2.030m/s^2. Calculate the vertical force exerted on the rotating blades of the helicopter by the air under the blades.

    asked by Anonymous on October 16, 2018
  74. Physics

    1.A race car has a mass of 707 kg. It starts from rest and travels 42.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it? Do I use F=ma so then m=707 and a=42/3 which is 14. So m=707 and a=14 and I

    asked by Lee Kite on October 8, 2007
  75. physics

    A 190 kg object and a 490 kg object are separated by 0.400 m. At what position (other than an infinitely remote one) can the 35.0 kg object be placed so as to experience a net force of zero? ------------ m from the 490 kg mass I do not understand how to

    asked by tina on November 30, 2008
  76. physics

    The lowest note on a grand piano has a frequency of 28.1 Hz. The entire string is 2.00 m long and has a mass of 440 g The vibrating section of the string is 1.90 m long. What tension is needed to tune this string properly?

    asked by deb on February 22, 2010
  77. chem

    As little as 1.oomg of Arsenic in 1-L of water can kill you. Calculate the following. Assume the density of the solution is 1.00g/cc. a.) How many moles of arsenic in 1 mg? b.) What is the mass percent of the solution? c.) What is the concentration in ppm

    asked by Tricia on December 8, 2012
  78. Physics

    A shot-putter throws the shot ( mass = 7.3 kg) with an initial speed of 14.0 m/s at a 36.0 ∘ angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.20 m above the ground.

    asked by MB on February 14, 2016
  79. physics 12th

    two halves of a round homogenous cyl inder are held together by a thread wrapped round the cylinder with two weights m are same.the complet cylinder has mass m1=31.4kg find minimum value of m for equlibrium of a cylinder

    asked by abhijit on February 19, 2016
  80. Physics

    Take the mass of the Earth to be 5.98 × 1024 kg. If the Earth’s gravitational force causes a falling 44 kg student to accelerate downward at 9.8 m/s2, determine the upward accelera- tion of the Earth during the student’s fall. Answer in units of m/s2.

    asked by Lily on December 16, 2015
  81. physics

    A boa box of mass 10kg is pulled along a rough floor with a force of 100N. the frictional force acting on the box is a constant 20N. What is the change in the kinetic energy of the box?

    asked by Rochelle on November 9, 2018
  82. Physics

    A hockey puck of mass .2kg is sliding down an inclined plane with an angle of 15 degrees to the horizon. If the puck is moving with a constant speed, what is the coefficient of kinetic friction between the puck and the plane?

    asked by Cassie on April 20, 2013
  83. Physics

    A massive steel cable drags a 20kg block across a horizontal, frictionless surface. A 100N force applied to the cable causes the block to reach a speed of 4.2m/s in a distance of 2.1m . What is the mass of the cable?

    asked by Eric on May 30, 2015
  84. college physics

    A board of mass m and length L is leaning against a wall. The wall is frictionless, and the coefficient of static friction between the board and the floor is µ. Find an expression for the minimum angle β at which the board can be leaned without slipping.

    asked by Adam on May 14, 2010
  85. science

    a skydiver experiences a downwar force due to gravity of 700 N and an upward force of air resistance of 570 N. The mass of the skydiver is 65 kg. What is the downward acceleration in meters/second squared of the skydiver?

    asked by joan on February 26, 2010
  86. PhYsIcS

    need help solving these problems. I tried but my teacher did not teach it to us so it is very difficult for me. Thanks. "Projectiles launched at an angle" 1. A golfer can hit a golf ball a horizontal distance of over 300 m on a good drive. What maximum

    asked by anonymous on October 25, 2006
  87. Probability/Statistics

    Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired

    asked by Amy on July 11, 2009
  88. chemistry

    a student dissolves 0.625 g of pure benzoic acid in distilled water and titrated the resulting solution to the equivalence point using 40.8 mL of the standardized NaOH solution from Part a, assuming that benzoic acid has only one ionizable hydrogen, answer

    asked by Anonymous on November 4, 2011
  89. Probability / Statistics

    I was wondering if someone could check my work thanks so the question is like so: The time it takes for a pendulum to complete the one period is simplified by the formula: T=2 pi square root (L/g) Where g is the constant measuring 9.80655m/s^2 and L is the

    asked by z score! on June 10, 2007
  90. physics

    A curve of radius 60m is banked so that a car traveling with uniform speed 70km/hr can round the curve without relying on friction to keep it from slipping to its left or right. The acceleration of gravity is 9.8m/s^2. What the the Angle of the curve? im

    asked by puff puff on September 17, 2006
  91. 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.

    asked by boneesha on October 1, 2010
  92. Math

    A ball that is hit or thrown horizontally ball that is hit or thrown horizontally with a velocity of v metres per second will travel a distance d metres before hitting the ground, where d=v square root h/ 4.9 and h is the height, in metres, from which the

    asked by Alex on October 7, 2014
  93. PHYSICS

    An irregularly shaped plastic plate with uniform thickness and density (mass per unit volume) is to be rotated around an axle that is perpendicular to the plate face and through point O. The rotational inertia of the plate about that axle is measured with

    asked by Charlene on March 24, 2007
  94. physics

    A red car with a 70kW engine and a mass of 1335kg accelerates at full power for 2s from rest along a level stretch of road heading east before going down a 3m high hill. The driver puts the car in neutral to accelerate as they coast down the hill. Some

    asked by Hadeel on May 12, 2011
  95. Chemistry

    A 50.0 −mL sample of 1.50×10−2 M Na2SO4(aq) is added to 50.0 mL of 1.23×10−2 M Ca(NO3)2(aq). What percentage of the Ca2+ remains unprecipitated? Calculate the moles of Ca(NO3)2 you have (concentration * volume in L). Moles of Ca(NO3)2 = moles of

    asked by K on March 31, 2018
  96. Math

    I'm learning series and sequences (grade 11). Please check that my steps show I understand what I'm doing/the concept and my answer as well: 5. The consecutive terms of an arithmetic sequences are 3.6, y, 8.2. Find the value of y. This seems to be a

    asked by Crystal on January 8, 2013
  97. -ECONOMICS-

    Consider a country in which capital per hour of work from 1950 to 1973 grew by 3 percent per year and output per hour of work grew by about 3 percent per year. Suppose that from 1973 to 1991, capital per hour of work did not grow at all and output per hour

    asked by Pale on October 13, 2008
  98. 5th grade math (word problems)

    I didn't see an answer from yesterday, so resending. Also, is there a website to explain how to solve word problems - like key phrases to look for (ex: 'in all' - add; 'what's left' - subtraction)? Here's question from yesterday: sorry,but I don't

    asked by Alex on December 12, 2012
  99. College Algebra

    In 1974, Johnny Miller won 8 tournaments on the PGA tour and accumulated $353,022 in official season earnings. In 1999, Tiger Woods accumulated $6,616,585 with a similar record. (a) Suppose the monthly inflation rate from 1974 to 1999 was 0.0079. Use the

    asked by Ashton on December 10, 2014
  100. Math

    In 1974, Johnny Miller won 8 tournaments on the PGA tour and accumulated $353,022 in official season earnings. In 1999, Tiger Woods accumulated $6,616,585 with a similar record. (a) Suppose the monthly inflation rate from 1974 to 1999 was 0.0079. Use the

    asked by Ashton on December 11, 2014

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