1. chemistry

    A solution containing 16.9 grams of a molecular compound dissolved in 250 grams of water has a freezing point of -0.744 degrees celcius. Find the molaltity of the solution. I have -0.744=-1.86*m*i. how do i find i. what is the gfm of the solute? I know

    asked by asldsfjaljd on April 9, 2008
  2. chemistry final step

    If you have 24.98 grams of P and 74.99 grams of O2, how many moles of each compound do you have present? so I got .805 of P (limiting) and 2.343 O2 (excess) how do i do this step ? If you have 24.98 grams of P and 74.99 grams of O2, how many moles of each

    asked by thad on January 30, 2013
  3. psy

    17. The average height of members of the high school basketball team is six feet, three inches. Jerry is on the high school basketball team, so Jerry must be taller than six feet. The argument above is flawed because it confuses (Points : 1) Jerry with

    asked by Cat on September 25, 2010
  4. AP Cemistry

    Calculate the heat that must be supplied to 10.5 g of Ne(g) at 0.15 atm to raise its temperature from 24◦C to 54◦C at constant pressure. Assume that neon behaves as an ideal gas. Answer in units of J. [So, I know that we would use q = mCDT at some

    asked by David on October 28, 2016
  5. Chemistry

    A solution of sodium chloride in water has a vapor pressure of 18.1 torr at 25°C. What is the mole fraction of NaCl solute particles in this solution? What would be the vapor pressure of this solution at 45°C? The vapor pressure of pure water is 23.8

    asked by Evelyn on January 13, 2019
  6. Chemistry

    help - confusion :( The oxidation of copper(I) oxide, Cu2O(s), to copper(II) oxide, CuO(s), is an exothermic process, 2 Cu2O + O2 --> 4CuO The change in enthalpy upon reaction of 75.30 g of Cu2O(s) is -76.83 kJ. Calculate the work, w, and energy change,

    asked by DC on November 3, 2013
  7. mechanics of materials

    A cylindrical tank with flat endplates is constructed from two sections that are welded together circumferentially.The outer diameter of the tank is 1.20, and the wall of the tank is 20.0 mm thick and the mamimum internal pressure is 2.00 MPa. (a)

    asked by dmkp on February 10, 2013
  8. mechanics of materials

    A cylindrical tank with flat endplates is constructed from two sections that are welded together circumferentially.The outer diameter of the tank is 1.20, and the wall of the tank is 20.0 mm thick and the mamimum internal pressure is 2.00 MPa. (a)

    asked by dmkp on February 9, 2013
  9. mechanics of materials

    A cylindrical tank with flat endplates is constructed from two sections that are welded together circumferentially.The outer diameter of the tank is 1.20, and the wall of the tank is 20.0 mm thick and the mamimum internal pressure is 2.00 MPa. (a)

    asked by dmkp on February 9, 2013
  10. mechanical properties of materials

    A cylindrical tank with flat endplates is constructed from two sections that are welded together circumferentially.The outer diameter of the tank is 1.20, and the wall of the tank is 20.0 mm thick and the mamimum internal pressure is 2.00 MPa. (a)

    asked by dmkp on February 9, 2013
  11. Chemistry

    A hydrated MgSO4 salt, weighing 3.211g, is heated in a crucible until reaching a constant weight. The weight of the anhydrous MgSO4 is 1.570 grams. 1. Calculate the moles of H20 removed and the moles of anhydrous MgSO4 remaining in the crucible. 2. What is

    asked by Marty on October 20, 2007
  12. Chemistry

    Two moles of pure ammonia were injected into a 2.00L flask at a certain temperature. The equilibrium mixture: 2NH3(G)-->N2(G) + 3H2(G)

    asked by Jimmy on May 17, 2009
  13. Physics

    An F-18 with a weight of 22500 lbs lands on a carrier with a speed of 120 mph. If the run-out of the arresting cable is 160 ft, what is the planes acceleration in feet per second squared?

    asked by Jim on March 15, 2015
  14. Economics Supply and Demand

    The demand function is Q=600-P with P being the price paid by consumer. I know the first P is $400 and Pnet is 160. There is 40% co insurance,. How do I figure out the quantity demanded? Our instructor said it was 440 but how do you get to that number?

    asked by Lisa on February 27, 2014
  15. Statistics

    If a basketball player has a shooting percentage of 60% , find the probability that the player will make at least 2 of her next 9 shots?

    asked by Hannah Jorgensen on October 5, 2016
  16. physics

    a basketball player can jump 1.5m off the hardwood floor with what upward velocity did he leave the floor

    asked by jheorge on November 10, 2017
  17. physics

    A basketball player can jump 2.16 m off the hardwood floor. With what upward velocity did he leave the floor? (use 9.8 m/s/s)

    asked by sarah on June 7, 2010
  18. geometry

    10. Exactly how many cubic inches of air can a fully inflated basketball hold if its radius is 4.8 inches

    asked by ella on October 9, 2011
  19. Statistics

    If a basketball player has a shooting percentage of 60% , find the probability that the player will make at least 4 of her next 6 shots?

    asked by Hannah Jorgensen on October 5, 2016
  20. math

    Exactly how many cubic inches of air can a fully inflated basketball hold if its radius is 4.2 inches?

    asked by a hall on April 16, 2011
  21. MATH

    Fabio said that there are 3 times as many people on a basketball team as on a tennis team. Is he correct? Explain why or why not.

    asked by ALEXANDRA on October 17, 2013
  22. math

    A basketball player had scored 865 points in 31 games. What was the rate in points per​ game?

    asked by dion on November 12, 2016
  23. math

    in circle p below the lengths of the parallel chords are 20,16, and 12. Find measure of arc AB..... the chord with a length of 20 is the diameter. the chords with lengths 16 and 12 are below the diameter torwards the bottom of the circle. arc AB is the arc

    asked by Bo on May 25, 2012
  24. Geometry

    in circle p below the lengths of the parallel chords are 20,16, and 12. Find measure of arc AB..... the chord with a length of 20 is the diameter. the chords with lengths 16 and 12 are below the diameter torwards the bottom of the circle. arc AB is the arc

    asked by John on May 25, 2012
  25. Chemistry

    A dive tank is designed and built to be safe if the difference between the pressure inside the tank and the pressure outside the tank does not exceed 12 atm. A diver has the tank filled at the dive store at a temperature of 20o C to a pressure of 10 atm.

    asked by Marinda on February 25, 2015
  26. AP Chemistry

    Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations

    asked by Frank on April 22, 2010
  27. Physics

    please check these for me Which of the following is not a fluid? a. carbon dioxide b. hydrogen c. seawater d. wood D Which of the following statements is not correct? a. a fluid flows b. a fluid has a definite shape c. molecules fo a fluid are free to move

    asked by teamjakeward on February 15, 2009
  28. physics

    A basketball player can leap upward 0.69 m. What is his initial velocity at the start of the leap?

    asked by on February 11, 2013
  29. science/maths?

    how much force is needed to accelerate a golfball and basketball at the same speed for one metre? please help needed soon!!!

    asked by who wants 2 no? on June 3, 2011
  30. Math

    A basketball player hits 90% of his shots. What is the probability tat he makes the next 3 shots?

    asked by Anonymous on September 20, 2010
  31. Punctuation

    Is there an error in the following phrase that contains the word "boys"? ex. - Junior boys' basketball team

    asked by AL 92 on May 13, 2010
  32. SPANISH

    TRUE OR FALSE In Tenochtitlán there was a stadium for a sport similar to basketball. true

    asked by y912f on May 9, 2009
  33. physics

    a basketball player can leap upward 0.5m. what is his initial velocity at the start of the leap?

    asked by chris on September 13, 2010
  34. Mathematics

    How many different squads of 5 players can be picked from 10 basketball players 252 30,240 50**** 120

    asked by Maria on May 10, 2019
  35. math

    a professinal basketball player is about how many meters tall? two meters is about six feet six inches, right?

    asked by mickey on October 26, 2006
  36. Physics

    A basketball is released from a height of 3m onto a hard surface. What height will the ball rebound to and why ?

    asked by John on February 2, 2012
  37. Chemisty

    Iodine monobromide and ammonia react to produce nitrogen triiodide and ammonium bromide. (a) Balance the chemical equation for this reaction. (Use the smallest possible whole numbers. Enter 1 where appropriate. Do not leave any answer box blank.) . IBr(s)

    asked by Megan on November 16, 2011
  38. chemistry

    According to Raoult's law, which statement is false? a. The vapor pressure of a solvent over a solution decreases as its mole fraction increases. b. The solubility of a gas increases as the temperature decreases. c. The vapor pressure of a solvent over a

    asked by thanh on March 14, 2008
  39. chem

    A sample of oxygen gas was collected via water displacement. Since the oxygen was collected via water displacement, the sample is saturated with water vapor. If the total pressure of the mixture at 26.4 °C is 725 torr, what is the partial pressure of

    asked by Natalie on April 15, 2014
  40. chemistry

    how would you find the theoretical yield of a reaction where all reactants and products are in 1:1 ratio, and there are two products formed which have the same MW. (products are collected as one..not separated) After finding the number of moles, I just

    asked by hilary on January 14, 2010
  41. math corrections

    I got a few questions wrong and i would like some explanations on these question: 2. A pair of pants sells for $6 more than 75% of its price of the pants? A.$12 B.$18 C.$20 D.$24 E.$36 Choice E is wrong. 4. What is the wall thickness, inches, of a tube

    asked by vincent on August 6, 2014
  42. chm

    The equilibrium constant for the equation 2 H2(g) + CO(g) CH3OH(g) Is 19 at a certain temperature. If there are 3.11 x 10-2 moles of H2 and 5.79 x 10-3 moles of CH3OH at equilibrium in a 6.75 L flask. What is the concentration of CO? At 1280 °C the

    asked by vikki on March 16, 2015
  43. Chemistry

    We did a lab. The reaction of zinc and iodine. We put 1 g of zinc with 1 g of iodine.. and used alcohol. Is the equation Zn + I2 ----> ZnI(2)? The moles of Zn atoms consumed were .003 mol. The moles of I atoms consumed were .004 mol. The class got a ratio

    asked by Morgan on September 15, 2010
  44. Math

    The heights off the starting five players on a high school basketball team are 77'',72'',69'',74'',and 77''.what is the median height of these players?

    asked by Kirandeep on January 16, 2014
  45. math

    a basketball player had scored 888 pts in 31 games. at this rate, how many games will it take him to score 1500pts?

    asked by denise on November 9, 2012
  46. Astronomy

    1.If you mande a model of the solar system with the Earth. The size of a tennis ball [about 6.5c.m in diameter] How big would your model of the sun be? 2.How far away from the tennis ball Earth would your model Sum be.If you kept the size and distance to

    asked by chuchy on July 22, 2005
  47. Chemistry

    consider 2 sample of nitrogen gas. sample 1 contains 1.5 mol of N2 and has a volume of 36.7L at 25C and 1 atm. sample 2 has a volume of 16.5L at 25C and 1 atm. calculate the number of moles of N2 in sample 2 do i use the pv= nrt equation? and do i only use

    asked by Anonymous on June 8, 2010
  48. chemistry

    Question: how to solve for a 28.4 L sample of methane gas is heated from 35.0° C to 76.0° C. The initial pressure of the gas is 1.00 atm at 35.0° C. Assuming constant volume, what is the final pressure of the gas? Could someone give me the setup for

    asked by sandy on November 22, 2011
  49. MATH

    A SOCCER TEAM PLAYED 160 GAMES AND WON 65 PERCENT OF THEM. HOW MANY GAMES DID THEY WIN?

    asked by JAMIE on August 11, 2010
  50. chemistry

    what is the total mass of Rn-222 remaining in an original 160-mg sample of Rn-222 after 19.1 days?

    asked by pamela on March 31, 2014
  51. georaphy

    What state is located 20 degrees north latitude and 160 degrees west longitude:-)

    asked by bri on February 2, 2015
  52. Algebra

    For two consecutive positive even integers, the product of the smaller and twice the larger is 160. Find the integers.

    asked by Callie on March 24, 2016
  53. algebra

    A stone dropped from rest travels 160 ft the first 3 seconds. How far will it have fallen at the end of 5 seconds?

    asked by tracey on October 15, 2012
  54. math

    160 people said their favorite color was blue. Below is the result of the survey. How many people were charted?

    asked by help on February 18, 2019
  55. math

    A gear on a bicycle has the shape of a circle. One gear has a diameter of 4 inches, and a smaller one has a diameter of 2 inches. Justin says that the circumference of the larger gear is 2 inches more than the circumference of the smaller gear. Do you

    asked by Tim on December 30, 2015
  56. Physics

    A fire truck attaches two fire hoses to a hydrant to fight a fire. Each hose has a diameter of 20 cm. The underground water pipe going to the hydrant has a diameter of 100 cm. In the underground pipe, the water has a speed of 2.0 m/s.

    asked by K on November 22, 2013
  57. Physical Chemistry

    When 1.00 g of gaseous I2 is heated to 1000. K in a 1.00 L sealed container, the resulting equilibrium mixture contains 0.830 g of I2. Calculate Kc for the dissociation equilibrium below. I2 2 I What I did was converted the initial I2 into moles then

    asked by Trixie on February 19, 2010
  58. Chemistry

    Alumminum hydroxide reacts with sulfuric acid as follows: 2Al(OH)3+H2SO4-->Al2(SO4)+6H2O. Which reagent is the limiting reactant when 0.500 mol Al(OH)3 and 0.500 mol H2SO4 are allowed to react? How many moles of Al2(SO4)3 can form under these conditions?

    asked by Chris Sung on October 29, 2010
  59. Chemistry Question!!

    When 1.00 g of gaseous I2 is heated to 1000. K in a 1.00 L sealed container, the resulting equilibrium mixture contains 0.830 g of I2. Calculate Kc for the dissociation equilibrium below. I2 2 I What I did was converted the initial I2 into moles then

    asked by Trixie on February 19, 2010
  60. CHEMISTRY: URGENT DRBob222

    A mixture of 0.50 mol of ethanoic acid and 1.00 mol of ethanol was shaken for a long time to reach equilibrium. The whole mixture was titrated quickly with 1.00 mol dm3 sodium hydroxide and 80cm3 of alkali were required. 1. Write an equation for the

    asked by LC-Laila on March 14, 2013
  61. math

    the sum of two numbers is 90.three times the larger decreased by twice the smaller is 160.what are the numbers?

    asked by rumbie on March 13, 2012
  62. Algebra

    160 kg of alloy contains 55 percent aluminium. How much alluminium should be added to make it 70 percent

    asked by Vijaya on September 20, 2017
  63. math

    a number is 160 when rounded off to the nearest ten.whta is the smallest possible value of the number?

    asked by Anonymous on August 10, 2016
  64. Chemistry - Half-life

    Phosphene decomposes to phosphorus and hydrogen in a first order mechanism. 4PH3(g) --> P4(g) + 6H2(g) This reaction's half-life is 35.0 s at 680 degrees C. If you had 520 mmHg of phosphene in an 8.00-L flask, how long does it take for the pressure in the

    asked by Aria on April 25, 2012
  65. math

    p=14.63⋅0.8 Atmospheric pressure, measured in pounds per square inch p, s, i is the force exerted by Earth's atmosphere over a given area. The atmospheric pressure, p, exerted on an airplane flying at an altitude of a miles above sea level can be

    asked by ryn on January 4, 2017
  66. Stats

    Suppose that diastolic blood pressure in hypersensitive women centers at 100mmHg and has a standard deviation of 16mmHg and it is normally distributed. What is the probability of randomly selecting a woman with a diastolic blood pressure less than 92mmHg?

    asked by Kleena on September 30, 2016
  67. Geology

    Briefly explain the process of wind, making sure to include the following terms and how each is related to wind development: solar radiation, temperature, air pressure/density, warm/cold air masses and high/low pressure. Please help as soon as you can

    asked by Andrea on April 12, 2019
  68. chem

    a) The vapour pressure of mercury at 100 ºC is 36.38 Pa. Calculate ∆Gº of vaporization of Hg (ℓ) at 100 º C. b) The vapour pressure of acetone, CH3COCH3 (ℓ) at 25 º C is 232 Torr. If ∆Gf º of CH3COCH3 (ℓ) at 25ºC is −155.7 kJ/mol ,

    asked by alex on February 8, 2019
  69. Chemistry

    Hydrogen gas is used for many purposes, including the hydrogenation of vegetable oils to make margarine. The most common industrial process for producing hydrogen is "steam reforming," in which methane gas, CH4, from natural gas reacts with water vapor to

    asked by Jimmy on November 15, 2016
  70. Geometry

    Prove that the tangents to a circle at the endpoints of a diameter are parallel. State what is given, what is to be proved, and your plan of proof. Then write a two-column proof. Hint draw a DIAGRAM with the points labeled. Can some one please check for me

    asked by DANIELLE on July 5, 2007
  71. Chemisty

    How many GRAMS of sulfur are present in 1.53 moles of sulfur dichloride ? grams. 2. How many MOLES of chlorine are present in 3.61 grams of sulfur dichloride ? moles.

    asked by love on February 7, 2012
  72. chem

    Calculate the mass in grams of carbon needed to produce 160 g of CO2 in burning: C + O2 --> CO2

    asked by paula on July 15, 2013
  73. Physics

    A chair with a mass of 21 kg is accelerated by a steady net force with a magnitude of 160 N. What is the magnitude of its acceleration?

    asked by Anonymous on March 4, 2011
  74. Math7

    Find the cost of the following situation. Dress Sale: Regular:$160 Now:$112 What % is given on the price of the dress?

    asked by Christine on March 18, 2010
  75. math fractions

    magazine wants to make $160 for each page of advertisement sold. What might magazine charge for each size ad if ads can be 1/32

    asked by Anonymous on December 2, 2012
  76. Math

    One serving of cereal provides you with 160 mg of sodium. This is 7% of your body's daily needs. How many milligrams of sodium equal 100%?

    asked by Anonymous on February 7, 2016
  77. Math

    An odd number is less than 160 and has exactly three defferent prime factors. What is the number? Explain your reasoning. ??? AAAH! help!

    asked by Kaitlyn on September 17, 2009
  78. Physics

    You throw a ball with a mass of 160 g into the air with an initial speed of 19.8 m/s. How high does the ball rise?

    asked by Nicole on September 13, 2015
  79. chemisty

    in a soda-acid fire extinguisher, concentrateed sulfuric acid reacts with sodium hydrogen carbonate to produce carbon dioxide, sodium sulfate and water. How many moles of sodium hydrogen carbonate would be neefed to react with 150.0 grams of sulfuric acid?

    asked by leslie on February 21, 2008
  80. Science

    Can you help with this one please? A drop of oil (vol 0.05cm^3) is released on to a calm surface of a pond where it spreads out and covers an area of 40 cm^2. Assume the oil film has uniform thickness equal to the diameter of an oil molecule. Calculate the

    asked by Bruce on February 5, 2007
  81. calculus

    A 20.0 g copper ring at 0.000°C has an inner diameter of D = 2.54000 cm. An aluminum sphere at 108.0°C has a diameter of d = 2.54508 cm. The sphere is placed on top of the ring, and the two are allowed to come to thermal equilibrium, with no heat lost to

    asked by stan on September 1, 2010
  82. physics

    One cubic centimetre (1.0 cm3) of water has a mass of 1.0 × 10−3 kg. (a) Determine the mass of 1.0 litre of water. Assuming that biological substances are 98% water, estimate the masses of (b) a cell with a diameter of 1.0 μm, (c) a human kidney, and

    asked by Jas on September 11, 2015
  83. deferential calculus

    a woman is walking at the rate of 5 feet per second along the diameter of a circular courtyard. a light at one end of a diameter perpendicular to her path casts a shadow on the circular wall. how fast is the shadow moving along the wall when the distance

    asked by clyde on December 1, 2016
  84. Chemistry

    a sample of helium gas is in a closed system with a movable piston. the volume of the gas sample is changed when both the temperature and the pressure of the sample are increased. the table below shows the initial temperature, pressure, and volume of the

    asked by Shanee on April 19, 2011
  85. physics

    Here is a demonstration Pascal used to show the importance of a fluid's pressure on the fluid's depth : An oak barrel with a lid of area 0.25 m^2 is filled with water. Along, thin tube of cross-sectional area 5.5×10−5 m^2 is inserted into a hole at the

    asked by Aaron on June 12, 2011
  86. Chemistry

    Sort each of the following events based on whether the solubility of the indicated gas will increase, decrease, or stay the same. Each phrase specifies the gas involved and the change in its environment. 1. The temperature is increased 2.the partial

    asked by Anon on January 23, 2013
  87. Chemistry

    One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq) ? FeCl2(aq) + H2(g); (Delta)H°= –87.9 kJ How much heat is liberated at constant pressure if 0.215 g of iron reacts with 40.4 mL of

    asked by Raul on March 24, 2013
  88. Chemistry

    In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 58.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 C when the reverse

    asked by Tracy on February 18, 2012
  89. Chemistry

    A mixture of He and CO2 in a flask at 45.0°C exerts a pressure of 955 torr. All of the CO2 is removed and is found to weigh 0.879 g. The pressure drops to 555 torr after the removal of CO2. What is the mass of He?

    asked by Kathy on September 5, 2011
  90. physics

    Water is forced out of a fire extinguisher by air pressure. How much gauge air pressure in the tank (above atmospheric) is required for the water jet to have a speed of 34.6 m/s when the water level is d = 0.520 m below the nozzle?

    asked by Anonymous on December 3, 2009
  91. Chemistry

    Nitrogen (80 kPa), oxygen (21.0 kPa), carbon dioxide (0.03 kPa), and water vapor are the usual components of air. What is the partial pressure of water in mm Hg if the total atmospheric pressure in 1.00 atm?

    asked by Anonymous on November 11, 2016
  92. 8th math

    How many ways can seven basketball players of different heights line up in a single row so no player is standing between two players taller then herself?

    asked by Robin on January 28, 2010
  93. math

    Below are the points that Jesse scored in each game during the basketball season. 12, 15, 14, 12, 4, 8. Which of the following values would increase his mean number of points? 13 10 8 12 9 11 You can select more than 1

    asked by Yep on December 13, 2018
  94. math

    perimeter of basketball court is 108 meters and the length is 6 meters longer than twice the width. what are the lenght and widht

    asked by Pauly on January 22, 2012
  95. Statistics

    If someone makes random guesses for each NCAA Basketball Tournament game, what is the probability of picking the winner in each game?

    asked by Mary on September 17, 2013
  96. math

    A basketball player makes 50% of his shots taken, on a bad night his percentage drops by a factor of 1/2. If he took 12 shots, how many did he make?

    asked by Amber on September 25, 2009
  97. SOCIAL STUDIES

    What popular form of entertainment drew from the immigrant experience? A.)Ragtime B.)Baseball C.)Vaudeville D.)Basketball Ragtime?

    asked by Karkat on January 31, 2018
  98. Geography

    The national basketball association team from Seattle in now in Oklahoma City. What two NFL teams will be returning to the city from whence they came?

    asked by bob on October 28, 2008
  99. math

    How many ways can seven basketball players of different heights line up in a single row so no player is standing between two players taller then herself?

    asked by robin on January 26, 2010
  100. math

    How many ways can seven basketball players of different heights line up in a single row so no player is standing between two players taller then herself?

    asked by robin on January 31, 2010