1. Chemistry

    What is the % by volume of an alcohol solution prepared from 35 ml alcohol and 350 ml of water?

    asked by Nene on February 19, 2012
  2. Chemistry

    A hot air balloon is filled with hot air and the hot air forces the volume of the balloon to expand until the density of the gas in the balloon is less than the density of the outside air. The volume must be 20% larger than the balloon would be at STP in

    asked by KS on April 25, 2016
  3. AP Physics

    You go to kitchen to boil water. You pour 280 gram of water to a container, and put the container on a 293 W electric heater. Assume that all the heat from the heater is used to heat the water. The specific heat of water is 4.19 J/g ° C. As always, be

    asked by Sasami on December 3, 2009
  4. math

    The manager of a tea shop mixes two types of teas to make a specialty blend. Alone, the teas sell for $3.99 and $8.99 per ounce. How many ounces of each type of tea should be used to make 32 ounces of a mixture that sells for $5.99 per ounce?

    asked by sean on May 29, 2014
  5. College Physics

    Finally, your friend's twin engine jet airplane lands. As it stands on the runway, you hear the sound of the engines getting louder and softer, rhythmically once every 2.3 s. The average frequency you hear is 3650 Hz. What are the differences between the

    asked by Anonymous on December 10, 2010
  6. chemistry

    Can someone please help me with this one? Explain which of the following statements does not make sense: a. a role of masking tape weighs 350 micrograms b. 92 cm cubed of water was poured onto the table c. the room covers an area of 200 m cubed I was

    asked by Gloria on October 22, 2006
  7. Chemistry

    a diver swimming at a depth of 10m under the water observes that the size of his air bubbles increase in volume as they rise to the waters surface. which gas law does this relate to?

    asked by sheryl on November 6, 2015
  8. AP Chemistry

    2K (s) + 2H2O (l) --> 2KOH (aq) + H2 (g) When 0.400 mole of potassium reacts with excess water at STP, what is the volume of hydrogen gas produced? the answer is 4.48 liters but I keep getting wrong numbers! please help! Thanks!

    asked by Andrew on October 2, 2008
  9. Chemistry

    The volume of a sample of ideal gas at 25*C is 372ml. What will be the volume of the gas if it is heated at constant pressure to 50*C? What will be the volume of the gas if it is cooled to -272*C?

    asked by Josh on October 9, 2012
  10. Calculus

    You have a conical tank, vertex down, which is 12 feet across the top and 18 feet deep. If water flows in at a rate of 9 cubic feet per minute, find the exact rate of change when the water is 6 feet deep. You know the rate of dV/dt (inflow), and you can

    asked by Tezuka on April 5, 2007
  11. Geometry

    A rectangular prism has a base that is 5 cm by 7 cm and a height of 12 cm. If all dimensions are doubled, what happens to the volume? A. When the dimensions are doubled, the volume is twice the original volume. B. When the dimensions are doubled, the

    asked by anon on March 2, 2014
  12. Calculus

    A tank contains 100 grams of a substance dissolved in a large amount of water. The tank is filtered in such a way that water drains from the tank, leaving the substance behind in the tank. Consider the volume of the dissolved substance to be negligible. At

    asked by jau on March 22, 2017
  13. science

    which of the following would help decrease the human ecological footprint? A.using bottled water instead of tap water B.using public transportation instead of riding in a car C.buying books instead of borrowing from the library D.using hot water instead of

    asked by Marco on December 9, 2013
  14. physics

    A high diver of mass 50.0 kg steps off a board 10.0 m above the water and falls vertical to the water, starting from rest. If her downward motion is stopped 2.10 s after her feet first touch the water, what average upward force did the water exert on her?

    asked by yeen on September 22, 2012
  15. Physics--Newtons Second Law

    A high diver of mass 60.0 kg steps off a board 10.0 m above the water and falls vertical to the water, starting from rest. If her downward motion is stopped 1.80 s after her feet first touch the water, what average upward force did the water exert on her?

    asked by Anonymous on March 5, 2012
  16. Environmental Helpp!

    Why would a 1 L bottle of water cost $1.50 whereas 1 L of gasoline currently costs about 90 cents? Discuss our current consumption of bottled water with specific emphasis on its relatively cleanliness compared to tap water, where the water comes from, how

    asked by Please Help on October 29, 2009
  17. Chemistry

    Mass of flask, boiling chips, foil cap and unknown after cooling reaction 83.350g 2.Mass of flask, boiling chips,and foil cap. 82.657 3. water bath temperature C is 95.0 C 4. Barometric pressure inches of Hg 30.09 5. Accepted molar mass of unknown is

    asked by Anonymous on June 14, 2010
  18. Chemistry

    1. Mass of flask, boiling chips, foil cap and unknown after cooling reaction 83.350g 2.Mass of flask, boiling chips,and foil cap. 82.657 3. water bath temperature C is 95.0 C 4. Barometric pressure inches of Hg 30.09 5. Accepted molar mass of unknown is

    asked by Anonymous on June 14, 2010
  19. science

    Imagine that you fill a bucket to the top with water and then place the bucket outside in freezing weather. Which of the following describes what will happen when the water in the bucket freezes? A. The level of the water and the bucket itself will not be

    asked by Batman on February 28, 2013
  20. Physics

    By how much does the H20 pressure exceed atmospheric pressure at 3 meters below the surface of a pool with fresh H20. I don't know what equation to use. You have to figure the weight of a column of water of some height h, and horizontal area A. Weight= mg=

    asked by Kristina on March 29, 2007
  21. physics

    A boulder in a river has weight of 65N. It displaces a volume of water with a weight of 10N. Which is the net force on this rock? 55 N down 65 N down 75 N up 75 N down

    asked by Carter on April 17, 2012
  22. chemistry

    200 ml of oxygen is collected over water at 18 degree Celsius and standard pressure, what will the volume of the dry oxygen be at STP?

    asked by jessica on June 15, 2013
  23. chemistry

    A solution is made by dissolving 0.10 mole of Na2SO4 in water to a final volume of 1.00 L. What is the molar concentration of Na+ ions in the solution?

    asked by Dolores Ramirez on April 5, 2013
  24. Chemistry

    what is the molarity of a solution prepared by dissolving 222 g of sodium carbonate in enough water to make a solution volume of 3250 mL's?

    asked by Heather on July 10, 2010
  25. alegebra

    a stone is thrown into a cylindrical water tank 2 feet in diameter, causing it to rise 1.5 inches. what is the volume of the stone?

    asked by Rachael on January 15, 2009
  26. science

    A steel block has a volume of 0.08m3 and a density of 7,840kg/m3 what is the force of gravity acting on the block(the weight in water?

    asked by Anonymous on January 31, 2014
  27. Chem 121

    A solution is made by dissolving 0.35 mole of LiI in enough water to give a final volume of 260.0 mL. What is the molarity of the solution?

    asked by Barbara on July 26, 2011
  28. Science

    A drop of oil of volume 10^10m spread out on water to make a circular film of radius 10^1m. What is the thickness of the film

    asked by Ali on October 26, 2017
  29. pharmacy calculations

    If 500gm of dextrose are dissolved in 600ml of water, with the final volume being 1000ml, what is the percentage strength of the dextrose in the solution?

    asked by Vicki on February 2, 2012
  30. physics

    three spheres have the same volume and all float in water. Spheres A, B, and C have masses of 25g, 30g, and 35g. Which sphere floats the highest.

    asked by mike on June 25, 2010
  31. Chemistry

    An aqueous solution of volume 7 dm3 is obtained by dissolving 5.5 kg of C12H22O11 in enough water. express the concentration in mol/L and mol/Kg

    asked by Susan on May 13, 2012
  32. chem

    If ice were to be placed in a container at a temperature of -2 oC, with a water vapor pressure of 2 torr, you would see a decrease in the volume of solid ice over time.

    asked by dan on September 7, 2010
  33. chemistry

    how many grams of NaC1 would you dissolve in water to make a total volume of 500ml of solution to produce a 0.5 soution of Nac1?

    asked by Anonymous on August 31, 2011
  34. phy

    A scuba diver and her gear displace a volume of 71.0 L and have a total mass of 64.0 kg. (a) What is the buoyant force on the diver in sea water?

    asked by mas on November 4, 2010
  35. Chemistry

    Calculate the density of 150g of a 25% by wieght solution of sodium chloride dissolved in water and the volume of solution is 145ml.

    asked by Elaine on January 24, 2012
  36. Chemistry

    An aqueous solution of volume 7 dm3 is obtained by dissolving 5.5 kg of C12H22O11 in enough water. express the concentration in mol/L and mol/Kg

    asked by Susan on May 10, 2012
  37. Chemistry

    A 5 mL sample of 50% (m/v) acetic acid (Hc2H3O2) solution is added to water to give a final volume of 25 mL....what is the final concentration?

    asked by Curlyqty on May 9, 2011
  38. Science

    A family is planning to build a raised planting area using a blend of peat moss, mulch , and a rich organic soil in which to grow the plants. They have been told first to place on the ground a layer of material that will allow for a proper drainage each

    asked by Mydogbear on May 13, 2017
  39. CHEMISTRY!!

    A student determined the calorimeter constant of the calorimeter. The student added 50.00 mL of cold water to 50.00 mK of heated , distilled water in a styrofoam cup. The initial temp of the cold water was 21,00C and the hot water, 29.15C. The maximum temp

    asked by Sydney on March 3, 2010
  40. Gr 11 Chemistry-Dilutions

    The cafeteria decides to save money by using concentrated acetic acid (CH3COOH at 17.5 mol/L) and diluting it with water toproduce vinegar (5.00% m/v aceticacid). a) What is the concentration of vinegar in mol/L?b) What volume of vinegar can the cafeteria

    asked by Anonymous on December 17, 2017
  41. Chemistry

    The cafeteria decides to save money by using concentrated acetic acid (CH3COOH at 17.5 mol/L) and diluting it with water toproduce vinegar (5.00% m/v aceticacid). a) What is the concentration of vinegar in mol/L?b) What volume of vinegar can the cafeteria

    asked by Anonymous on December 17, 2017
  42. Chemistry

    A solution is prepared by adding 47.3 mL of concentrated hydrochloric acid and 16.3 mL of concentrated nitric acid to 300 mL of water. More water is added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution. [Hint:

    asked by Andrew on May 22, 2012
  43. Chemistry

    A solution is prepared by adding 50.3 mL of concentrated hydrochloric acid and 16.6 mL of concentrated nitric acid to 300 mL of water. More water is added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution. [Hint:

    asked by Andre on February 29, 2012
  44. Calculus AB

    What is the maximum volume in cubic inches of an open box to be made from a 16-inch by 30-inch piece of cardboard by cutting out squares of equal sides from the four corners and bending up the sides? Your work must include a statement of the function and

    asked by Vikram on January 11, 2016
  45. physics

    I had asked a question.why when solid body with greater density than water is when dropped from floating boat water level rises? the answer has been given that as the solid body is more dense than water displaces less fluid as compared to when it was a

    asked by zoha on October 2, 2014
  46. Chemistry

    A 7.65 g sample of potassium chlorate,KClO3, was heated to decompose all the oxygen. It was found that 2.25 L of oxygen was collected over water at 25.00degreesC and 1.00 atm of pressure. The vapor pressure of water at that temperature is 23.8 mm Hg. How

    asked by Smushy on December 16, 2014
  47. thermodynamics

    equal to 1/4 th of the heat rejected to the sink. the efficiency of the engine is

    asked by Anonymous on February 2, 2013
  48. math 104

    A rocket engine, 2.44 cross product 10−5 watts/cm2

    asked by Anonymous on December 7, 2014
  49. physics

    how much work is done by an engine using 105 watts of power in 3.2 seconds?

    asked by Jason on April 12, 2011
  50. science

    What is the maximum amount of work that can be done in 15 seconds by an engine working at 30 kw?

    asked by Tionge on February 9, 2016
  51. physics

    how long does it take a 19kW steam engine to do 6.8x10^7 J of work?

    asked by yo on March 1, 2010
  52. physics

    How long does it take a 25 kW steam engine to do 5.6 × 10^7J of work? Answer in units of s

    asked by stacy on January 6, 2012
  53. math

    A 6 CYLINDERHAS CYLINDERS WITH A RADIUS OF 2.22" AND A HT. OF 3.25", WHAT IS ENGINE SIZE OF THIS CAR?

    asked by DOROTHY on January 26, 2015
  54. Physics

    What is the power output of an engine the does 60,000J of work in 10s?

    asked by Alina on December 20, 2010
  55. Science

    gasline burns in a car engine is a phyical change?

    asked by Halei on October 23, 2008
  56. Chemistry

    You put a rock weighing 45g into a graduated cylinder. Before you put the rock in the graduated cylinder, the volume of water in the cylinder is 10mL. After you put the rock in the graduated cylinder, the volume rises to 25mL. What is the density of this

    asked by Lysa on February 21, 2017
  57. Chemistry

    A sample of oxygen gas is collected by displacing water from an inverted bottle as shown in the diagram below. The volume of O2(g) collected is 400.0ml at 25 degree Celsius. The atmospheric pressure is 680 torr and the vapor pressure of water at 25 degree

    asked by K on February 3, 2011
  58. Math

    A pyramid is inscribed in a cube whose volume is 52pi cm^3. The volume of a sphere is equal tpo the volume of this pyramid. Find the volume of a second cube whose edge is equal to the radius of the sphere.

    asked by Eli on May 30, 2011
  59. Algebra!!

    1.a swimming pool has a radius of 10 feet and a height of 4 feet. What is the volume? 2.What is the volume of a soup can with a radius of 4cm and a height of 16cm? 3.What is the volume of a triangular prism with a length of 10cm a width of 15cm and a

    asked by Renee on March 31, 2012
  60. Engineering

    Determine the minimimum depth of a water reservoir that will provide a flow rate of 1200 gpm in a 4 inch diameter horizontal pipe that opens to the atmosphere You ought to consider Bernoulli's equation for this, it is in your text. You can model it as

    asked by matt on September 10, 2006
  61. Chemistry

    What volume (mL) of 0.20 M HCl needs to be added to 1.23 L of 0.10 M acetic acid to reduce the percent ionization to 1.00%? Assume the volume of HCl added is negligible compared to the volume of the whole solution, and that the small x approximation is

    asked by Molly on March 3, 2015
  62. Geometry

    Given a soda can with a volume of 21 and a diameter of 6, what is the volume of a cone that fits perfectly inside the soda can? (Hint: only enter numerals in the answer blank). 7 because volume of a cylinder is pi r^2 h, and a cone is 1/3 pi r^2 h, which

    asked by Jessie on February 23, 2016
  63. calculus

    A cylinder is generated by rotating a rectangle with perimeter 12 in. about one of its sides.? Express the volume of the cylinder as a function of x. Find the approximate value of x that maximizes the volume. Then give the approximate maximum volume.

    asked by riri on October 20, 2012
  64. PreCal

    A square sheet of cardboard 18 inches is made into an open box (there is no top), by cutting squares of equal size out of each corner and folding up the sides. Find the dimensions of the box with the maximun volume. Volume= base(width)height but base + 2H

    asked by Chau on November 6, 2006
  65. Physics

    1. Which of these physical situations describes an inversely proportional relationship? (Points : 1) The volume always decreases as the pressure increases. The volume always increases as the pressure increases. The pressure vs. volume graph is a straight

    asked by Deborah on October 17, 2012
  66. Algebra

    The volume in cubic feet of a Cd holder can be expressed as V(x)=-x^3-x^2+6x, the depth is 2-x , factor the polynomial to find linear expression for the height and the width. - Do I just factor the -x^3-x^2+6x? It because I know the volume is LWH, so don't

    asked by Shadow on February 8, 2012
  67. Chemistry

    A driving bell is a container open at the bottom. As the bell descends, the water level inside changes so that the pressure inside equals the pressure outside. Intially the volume of air is 8.58m^3 at 1.020 atm and 20 degrees C. What is the volume at 1.584

    asked by Lauren on October 23, 2007
  68. Math CALCULUS HELP PLEASE

    Tidal volume is the volume of air displaced in the lungs between inhalation and exhalation (the amount of air in a breath). The residual volume is given by the amount remaining in the lungs even after the deepest exhalation (i.e. the minimum amount of air

    asked by Brad on January 20, 2016
  69. Chemistry

    Please help! I don’t know where to start and I need step by step on how to solve: A gaseous mixture inside a rigid steel vessel contains 75% CO2(g) and 25% H2O (g) by volume at 175 degrees Celcius and 225 kPa. The mixture is then cooled to 0 degrees

    asked by Jacqueline on April 27, 2018
  70. chemistry

    An empty beaker weighs 39.17 g. a) When completely filled with water, the beaker and its contents have a total mass of 406.25 g. What volume does the beaker hold? Use d =1.00 g/mL as the density of water. for A i got 367.08 but I don't know for this b) How

    asked by Jennifer on March 7, 2017
  71. Physics

    A high diver of mass 68.2 kg jumps off a board 10.4 m above the water. The acceleration of gravity is 9.8 m/s2 . If his downward motion is stopped 3.58 s after he enters the water, what average upward force did the water exert on him? I already calculated

    asked by Khan on December 5, 2012
  72. English Comma splices and run on sentences

    The recipe says to stir together flour, salt, and baking soda _______ add to butter, eggs, and vanilla mixture and stir to blend. add the word and insert a question mark insert a comma insert a period and make two separate sentences my answer insert comma

    asked by christopher on April 22, 2010
  73. Science

    What volume of ethanol must be diluted with water to prepare 768 mL of 0.873 M solution? The density of ethanol is given as 0.789 g/mL. Answer in units of mL

    asked by Agnes on March 8, 2013
  74. Biology

    2 g of glycine (C2H5NO2) are dissolved in water to a total volume of 3 L. What is the concentration of the glycine solution in M? Round answers to two significant figures.

    asked by Tori on January 16, 2017
  75. Chemistry

    2Na + 2H2O = 2NaOH + H2 Calculat the moles and volume of hydrogen produced when 0.2 moles of sodium reacts with excess water.

    asked by Noah on May 29, 2011
  76. Chemistry

    What volume of ethanol must be diluted with water to prepare 768 mL of 0.873 M solution? The density of ethanol is given as 0.789 g/mL. Answer in units of mL

    asked by Agnes on March 8, 2013
  77. science

    What volume of ethanol must be diluted with water to prepare 674 mL of 0.854 M solution? The density of ethanol is given as 0.789 g/mL. Answer in units of mL

    asked by Susan on May 13, 2014
  78. science

    A student is all 32 gram of potassium nitrate in water to prepare 200 ml of solution what is the concentration of solution in terms of mass by volume

    asked by PARNEET on June 9, 2017
  79. science

    5 L OF H2 GAS WAS COLLECTED OVER WATER AT 25 CELCIUS AND 750 MM PRESSURE CALCULATE THE VOLUME OF DRY H2 AT STP AQUEOUS TENSION AT 25 CELCIUS IS 23 MM

    asked by ritika agarwal on June 12, 2015
  80. Physics

    An object has a weight of 0.852 N. It is suspended from a scale, which reads 0.749 N when the piece is submerged in water. What is the volume of the piece of metal?

    asked by Robb on January 29, 2012
  81. Physcis

    a black of mass 92 kg and volume 0.031 lies at the bottom of the sea how much force is needed to lift it ? take 1.03*10^3 kg/m as the density of sea water

    asked by eman on September 7, 2013
  82. physics

    A full can of soda has a mass of 0.421 kg. It contains 3.57 x 10-4 m3 of liquid. Assuming that the soda has the same density as water, find the volume of aluminum used to make the can.

    asked by please help with these practice problems on July 20, 2013
  83. math

    A water tank is 12m high.it has a a rectangular base, and the length is 7m more than the width. if the volume is 1728m3, find the dimensions of the tank

    asked by kledi on February 6, 2014
  84. math

    A water tank is 12m high. it has a a rectangular base, and the length is 7m more than the width. if the volume is 1728m3, find the dimensions of the tank

    asked by kledi on February 6, 2014
  85. chemistry

    What volume of ethanol must be diluted with water to prepare 315 mL of 0.620 M solution? The density of ethanol is given as 0.789 g/mL. Answer in units of mL

    asked by james on April 25, 2014
  86. chemistry

    What volume of distilled water should be added to 500ml of a solution of sulphuric acid to 90% by weight, density 1.81 g.mL-1, to obtain a 10 Molar solution?

    asked by Shania on September 4, 2017
  87. Chemistry

    "What volume of water must be added to 100ml of 15 M of H2SO4 to dilute to 5.0M?" I've tried using lots of different methods but keep having the same answer and don't know if the answer book is wrong or if it's me. Thanks!

    asked by Josie on January 18, 2017
  88. Chemistry

    A radiator is to be protected against freezing to -20f. Calculate the volume of C2H4(OH)2 ethylene glycol per liter of water. Density of glycol is 1.11 g/ml

    asked by Daisy on July 23, 2012
  89. Chem help please

    What volume ( L ) of the solute methanol should be added with 4450 mL of the solvent water to make a solution that is 0.443 m methanol. i do not know how to approach this question

    asked by henry on February 6, 2009
  90. Geometry-Help PLZ

    Each of 6 cubes has a volume of 64 cubic units. If the figure is reduced in size such that the volume of each new cube is 1/8 the volume of the original, what is the surface area of the 6 cubes after the decrease? I came up with 96 sq units Is this

    asked by Mary on May 25, 2011
  91. Math

    Please help me with some good websites for the followung question. what industry is affected by the economy,such as the airline, automobile, home building, technological or gasoline?

    asked by Kim on April 5, 2008
  92. physics

    An automobile manufacturer claims that its product will travel 1.2 km in 27 s, starting from rest. What is the magnitude of the constant ac- celeration required to do this? Answer in units of m/s2.

    asked by Anonymous on November 18, 2010
  93. physics

    What net force would actually be necessary to stop an automobile of mass 880 traveling initially at a speed of 52.0 in a distance equal to the diameter of a dime, which is 1.8 ?

    asked by hydro on March 17, 2010
  94. math

    An automobile rental angency charges $170 for 5 days for a certain model car. What is the unit price in dollars per day? why is it 59/3gal

    asked by angel on September 17, 2014
  95. Math

    An automobile of mass 2000 kg moving at 30 m/s suddenly stopped with a constant braking force of 10000 N. How far does the car travel before stopping?

    asked by Desiree on October 19, 2017
  96. Economics

    How will a new law mandating an increase in required levels of automobile insurance affect the equilibrium price and quantity in the market for new automobiles?

    asked by Nickey on October 18, 2007
  97. physics

    Determine the stopping distances for an automobile going a constant initial speed of 97km/h and human reaction time of 0.50s , for an acceleration a=−6.5m/s2

    asked by Shan on August 30, 2013
  98. chemistry

    what volume of water is required to make 0.20 M solution from 16 ml of 0.5 M solution?

    asked by prateek on May 26, 2013
  99. chemistry

    What volume of a 4.50% v/v solution of ethanol in water can be prepared with 23.9 mL of ethanol

    asked by Anonymous on February 24, 2012
  100. Maths

    There were 3 glasses containing the same volume of liquid. Mr Lee poured 210 ml of the liquid from Glass A into Glass C, and 150 ml of the liquid from Glass B into Glass C. In the end, the ratio of the volume of liquid in Glass A to the volume of liquid in

    asked by Zayn on September 30, 2012