1. Intro to Physical Science

    A car whose mass is 1000 kg is traveling at a constant speed of 10 m/s Neglecting any friction, how much force will the engine have to supply to keep going the same speed?

    asked by Anonymous on April 19, 2011
  2. Integrated Science

    What is the acceleration of a car when the engine exerts 20000 N of force, road friction is 10000 N and the mass of the car is 2000 kg?

    asked by Tonya Jones on March 6, 2013
  3. Intro to Physical Science

    A car whose mass is 1000 kg is traveling at a constant speed of 10 m/s Neglecting any friction, how much force will the engine have to supply to keep going the same speed?

    asked by Anonymous on April 19, 2011
  4. physics

    when 1 g of gasoline is burned in an engine about 48 kj of heat is produced. how much mass is lost in the process? do you think this mass change could directly be measured?

    asked by sam on February 28, 2013
  5. physics

    a heat engine operates between 403 K and 1263 K at 67% of Carnot efficiency. How much work can it produce from 5900J of input heat?

    asked by Sara on November 6, 2013
  6. physics

    An engine pulls a train 1km over a level track.Calculate the work done by a train given that frictional resistance is 5*100000N

    asked by Anonymous on October 30, 2011
  7. science-chemistry

    We performed a titration with NaOH solution with KHP. Now I need to calculate the average molarity of NaOH based on this data Weight of khp= 0.1083 g Volume of naoh = 6.4 ml Then if i get this how do i get the molarity of ch3cooh totrated in naoh with the

    asked by cassy on April 23, 2014
  8. Chemistry

    You take 326 g of a solid (melting point = 57.6oC, enthalpy of fusion = 346 J/g) and let it melt in 757 g of water, and the water temperature decreases from its initial temperature to 57.6oC. Calculate the initial temperature of the water. (Note that the

    asked by Jake on May 6, 2012
  9. math

    The upward velocity, v, of the water in a fountain is 28 more than the product of -32 and t, where t is the number of seconds after the water leaves the fountain. As the water moves upward, its velocity decreases until it reaches the top where the velocity

    asked by .I. on February 21, 2017
  10. Chemistry

    In an experiment we have 4 liters of AlAin water in contain or A , and 2 liters of dubai water in contain out B . The alkalinity of water in container A and the alkalinity of water in container B are 50 and 150mg/l as caco3 ,,respectively the alkalinity of

    asked by Mariam on April 20, 2014
  11. Physics

    Which of the following is a direct result of the equation of continuity? a. The pressure one meter below the surface of water is about 10% greater than atmospheric pressure. b. The pressure on the inlet side of a horizontal pipe through which water is

    asked by Johnny on January 18, 2013
  12. Chemistry

    1. A small piece of zinc reacts with dilute HCl to form H2, which is collected over water at 16°C into a large flask. The total pressure is adjusted to barometric pressure (752 torr), and the volume is 1538 mL. Use Table 5.2 to help calculate the partial

    asked by Carter on October 18, 2010
  13. Chem

    Calculate the expected volume of hot water that would be required to dissolve 0.15g of benzoic acid, vanillin, phthalic acid, salicyclic acid? You don't need to do all or any of them. I just need to know what formula to use and what to sub in and I can do

    asked by Sam on May 25, 2009
  14. chemistry

    5ml of 8N Hn03, 4.8ml of 5N hcl and a certain volume of 17M h2s04 are mixed together and made up to 2 liter. 30ml of this acid mixture exactly neutralizes 42.9ml of na2c03, 10 h20 in 100ml of water .Calculate the amount of sulphate ion in gm present in

    asked by Fai on January 27, 2013
  15. chemistry

    A student estimated the volume of a liquid in a beaker to be 300 mL. When she poured the liquid into a graduated cylinder, she measured the volume as 295 mL. Considering the measurement in the graduated cylinder to be the accepted value, what is the

    asked by gamma on April 11, 2013
  16. Chemistry/lab math

    For an AST determination, 0.2 mL of serum was used. The change in absorbance (ΔA) was measured at 340 nm with a 3 mL reaction mixture. The initial reading was 0.54 A, the reading after 5 minutes was 0.32 A. Report the AST value in IU. Equation to use when

    asked by Anonymous on August 21, 2013
  17. math

    A water pitcher contains 2323 gallon of water. You add 5757 gallon of water to the pitcher. How much water does the pitcher contain? Write the answer in simplest form.

    asked by yuo on May 25, 2016
  18. Chemistry

    A sample of hydrogen gas (H2) is produced in a laboratory by displacement of water. A 645 mL sample of hydrogen is collected at 25 degrees Celsius and a total pressure of 758 torr. Collecting gas by water displacement causes the gas to become saturated

    asked by Roger on May 20, 2016
  19. sciencee

    1. What pressure would be needed to compress 25.1 mL of hydrogen at 1.01 atm to 25% of its original volume? 2. If the pressure on a 1.04-L sample of gas is doubled at constant temperature, what will be the new volume of the gas? 3. A 1.04-L sample of gas

    asked by Teisha on March 10, 2010
  20. Science - Climate change

    This is from my textbook, about sea breeze. "A water breeze occurs during the day when the solar energy warms up the land faster than the nearby water. Remember that water is a better heat sink than land, and so can absorb a lot of energy without getting

    asked by Jasmine on December 12, 2017
  21. Algebra

    A water tank holds 500 gallons of water. The water is used at a rate of 12 gallons per hour. How much water is in the tank after 11 hours.

    asked by Nelle on November 21, 2016
  22. MATH

    Aiden uses 1/4 of the water in a bucket to water 1 plotted plant.How many plotted plants can Aiden water with 3 full buckets of water?

    asked by - on January 6, 2018
  23. math

    A supersoaker water pistol can hold up to 4 litres of water. If each shot uses 11/12 of amount of water of its previous shot, the amount of water fired by a fully loaded supersoaker's first shot is? x/4000ml=11/12 x=3666.7mL why is the answer 333mL?

    asked by cyn on January 9, 2010
  24. math

    [2 marks] Fashion One Chain Store found that t weeks after the end of a sales promotion the volume of sales was given by S(t)BAekt (0t4) Where B = 50,000 and is equal to the average weekly volume of sales before the promotion. The sales

    asked by mawadda on October 4, 2012
  25. math

    [2 marks] Fashion One Chain Store found that t weeks after the end of a sales promotion the volume of sales was given by S(t)BAekt (0t4) Where B = 50,000 and is equal to the average weekly volume of sales before the promotion. The sales

    asked by mawadda on October 4, 2012
  26. math

    [2 marks] Fashion One Chain Store found that t weeks after the end of a sales promotion the volume of sales was given by S(t)BAekt (0t4) Where B = 50,000 and is equal to the average weekly volume of sales before the promotion. The sales

    asked by mawadda on October 4, 2012
  27. College Chemistry

    Stuck on plugging info into formula, please show set up-At 10 degrees C carbon dioide gas has volume of 25.5 mL under pressure of 758 mmHg, what would volume of CO2 be at STP?

    asked by Sandra on November 9, 2010
  28. General Chemistry : for Nursing

    Im Having a really Hard time with this problem :( ---> A sample containing 5.60g O2 gas has a volume of 31.0L . Pressure and temperature remain constant. 1 .) Oxygen is released until the volume is 8.00L . How many moles of O2 are removed?

    asked by Shayla on November 12, 2013
  29. chemistry

    Calculate the enthalpy of atomization per unit volume for Rb. Express your answer in kJ/m3. Determine the volume (in mL) occupied at room temperature by 3.5e22 mercury (Hg) atoms in the liquid state.

    asked by schoolgirl on March 23, 2013
  30. Algebra

    convert english measurements to metrics L 134 in W 124 in H 92 in I took these three and multiplied them by 2.54cm I got 889cm. I need to find the volume in cubic centimeters. If each dimension (L,W,H) is doubled, what happens to the volume of the room?

    asked by Jackie on June 27, 2012
  31. Chemistry

    A sample of nitrogen occupies a volume of 300ml under a pressure of 380 torr at -177C. What would be the volume at STP? I know the answer is 430mL but I don't know which equations to use to formulate the calculation.

    asked by n on May 1, 2014
  32. chemistry

    When ice at 0C melts to liquid water at 0C, it absorbs 0.334 kj of heat per gram. Suppose the heat needed to melt 31.5 g of ice is absorbed from the water contained in a glass. If this water has a mass of .210 kg and a temperature of 21.0C, what is the

    asked by Capacino on June 24, 2009
  33. chemistry

    what are some source errors in my experiment? determine absolute zero. We attached a capillary to a ruler with a thermometer. placed it in water and heated. I recorded and my partner did the readings. source errors: -partner didn't stir the water before he

    asked by dan on June 22, 2009
  34. Physics

    A partially filled bucket of water sits on a scale and its weight is 4.8 N. A piece of metal is suspended from a thread and completely immersed in the bucket (but does not touch the bottom). The scale now reads 7.8 N. Find the volume of the metal.

    asked by Anonymous on May 29, 2016
  35. chem

    The molarity and the molality of a solution prepared by dissolving 2.00 g of ethanol C2H5OH with 100.0 g of water to give a final volume 102 mL are would i just add both the grams and divide by 102 for molarity? and molalty i would just add the mass?

    asked by so on August 8, 2008
  36. chemistry

    Ammonia gas and carbon dioxide gas react to form aqueous urea (NH2CoNH2) and water. What volume of ammonia at 25 degrees celcius and 1.5 atm pressure is needed to produce 500 g of urea?

    asked by Beth on November 24, 2010
  37. Physics

    A partially filled bucket of water sits on a scale and its weight is 3.5 N. A piece of metal is suspended from a thread and completely immersed in the bucket (but does not touch the bottom). The scale now reads 7.5 N. Find the volume of the metal.

    asked by Anonymous on May 28, 2016
  38. Chemistry

    This lab is ruining me. isopentyl acetate is a blend of isopentanol, acetic acid, and sulfuric acid. How can products be determined from this information? ethyl acetate is ethyl alcohol, acetic acid and sulfuric acid. Octyl Acetate is n-octanol,

    asked by Aidan on January 14, 2010
  39. chemistry

    What is the mass/vol % ethanol in an ethanol-water solution with density of 0.875 g/ml and containing 65.0% ethanol by volume? The density of pure ethanol is 0.789 g/ml.

    asked by jimbo on June 27, 2010
  40. Chemistry

    A 50.0 g silver object is added to 75.5 mL of water contained in a graduated cylinder. The density of silver is 10.5 g/mL. What is the total volume in the graduated cylinder?

    asked by Micelle on January 23, 2013
  41. TCC

    A 50.0 g silver object is added to 75.5 mL of water contained in a graduated cylinder. The density of silver is 10.5 g/mL. What is the total volume in the graduated cylinder?

    asked by Micelle on January 23, 2013
  42. ap chem

    A sample of 7.45 grams of NaOH is dissolved into 609 mL of aqueous 0.250 M NaOH (as-sume no volume change). This solution is then poured into 2.18 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in

    asked by cheri on September 17, 2012
  43. chemistry

    A sample of 6.65 grams of NaOH is dissolved into 621 mL of aqueous 0.250 M NaOH (as- sume no volume change). This solution is then poured into 2.16 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in

    asked by lauren on December 19, 2012
  44. Science

    1. Which component of the technological system is achieved when an automobile airbag inflates? A. Input B. feedback C. process D. output I think the answer is D. Output. Possibly C. Process. Please help. It will be greatly appreciated. Thank you for your

    asked by BabyCakes101 on October 4, 2015
  45. Math (Stats)

    Consider the the distribution of under-inflated tires on a four-wheel automobile. The mass density is given by: p(0) = 0.4, p(1) = p(2) = p(3) = 0.1, p(4) = 0.3 a) Find the expected value and the variance of this distribution. b) For what proportion of

    asked by Ray on April 15, 2018
  46. calculus

    An automobile travels at a constant speed around a curve whose radius of curvature is 2000m. What is the maximum allowable speed if the maximum acceptable value for the normal scalar component of acceleration is 1.5m/s squared?

    asked by aimi najwa on April 24, 2013
  47. Math check my answers please!!!!

    1. Find the volume of a square pyramid with a base length of 9 cm and a height of 4 cm A.324 cm^3 B.108 cm^3 C.36 cm^3 D.152 cm^3** 2. Find the volume of the given cone. It has a radius of 6 in. And a height of 11 in. A. 320 in^3 B.1,224 in^3 C.415 in^3**

    asked by Gurl nerd on April 25, 2018
  48. science

    3 moles of pesticide of molecular mass 200 g/mole is applied to a closed system consisting of 20 m3 of water, 10 m3 of air, 1 m3 of sediment, and 0.001 m3 of fish. Determine the concentration and amount in both grams and mole units in air, water, sediment

    asked by gift on March 27, 2014
  49. yoyo

    At room temperature, 20° C, water (H2O) is a liquid and oxygen (O2) is a gas. Based on kinetic molecular theory, which answer best explains the states of the two fluids? a The particles in the liquid have greater kinetic energy than the particles in the

    asked by yo on November 14, 2017
  50. Biology

    Supposing you have a renal stenosis, what kind of affect does that have on the heart. What I do know: - decreased flow to the kidneys - kidneys assumes that overall blood volume have decreased - RNN system is activated - = increase in blood pressure

    asked by Lena on February 5, 2011
  51. Calculus

    Hello...i just had a quick question...its probably something easy to get...maybe i am thiking too hard...but the question is estimate the volume of solid that likes above the square R=[0,2] * [0,2] and below the elliptical paraboloid z=16-x^2-2y^2..divide

    asked by Kim on November 5, 2007
  52. physics

    An aluminum plate of mass 0.1 kg at 95oC is immersed in 0.5 litre of water at 20oC kept inside an insulating container and is then removed. If the temperature of the water is found to be 23oC, then the temperature of the aluminum plate is ___________ oC.

    asked by Rohan on June 3, 2016
  53. Science

    If you swung a bucket of water quickly in an upside down circular path, the water would not fall out of the bucket. Which of the following best describes why this happens? a. Due to centripetal force, the water is pushing on the bottom of the bucket.*****

    asked by Anonymous on February 7, 2018
  54. Geo 7th Grade

    To help reduce air pollutions legislation had been passed a. stating that all vehicles made after 2015 must contain hybrid engines. b. banning the use of any items that cause smog. c. limiting automobile gas emissions, d. requiring all households to have

    asked by rawr... im a dinosaur.... rawr on November 17, 2012
  55. chemistry

    STANDARD: Put into a clean 250 mL volumetric flask exactly ..... 0.90 ml of 1.00 mM iodate STANDARD. Add an excess of 1M KI and 1M Sulfuric Acid and let stand for 5 minutes. Dilute to volume. UNKNOWN: Pipet into a clean 250 mL volumetric flask 1.00 mL of

    asked by faruk on July 28, 2013
  56. Chemistry Urgent

    1) 30cm3 of methane and ethane mixed with 100cm3 of O2 at RTP. Explosion occurs, on cooling 61.5cm3 remained. Find the percentage by volume of each gas in the mixture 2)32cm3 of a mix of CO2, CH4 and H2 mix with 50cm3 of O2 and exploded after cooling to

    asked by Ava on February 10, 2014
  57. chemistry

    Hello, I am having problem with two lab questions and was wondering if someone can help! 1. Calculate the percentage of the empty space in a face-centered cubic lattice, and show that it does not depend on the edge length of the unit cell ot on the size of

    asked by Dina on February 3, 2010
  58. chemistry help!

    Hello, I am having problem with two lab questions and was wondering if someone can help! 1. Calculate the percentage of the empty space in a face-centered cubic lattice, and show that it does not depend on the edge length of the unit cell ot on the size of

    asked by Dina on February 4, 2010
  59. algebra

    The volume of gas varies directly with temperature and inversely with pressure. Volume is 100 m^3 when temperature is 1508 degrees and pressure is 15 lb/cm^2. What is the volume when the temperature is 2508 degrees and the pressure is 20 lb/cm^2?

    asked by ciara on February 12, 2013
  60. physics

    The depth of the ocean is sometimes measured in fathoms (1 fathom = 6 feet). Distance on the surface of the ocean is sometimes measured in nautical miles (1 nautical mile = 6076 feet). The water beneath a surface rectangle 3.70 nautical miles by 2.80

    asked by S on September 13, 2014
  61. physics

    The depth of the ocean is sometimes measured in fathoms (1 fathom = 6 feet). Distance on the surface of the ocean is sometimes measured in nautical miles (1 nautical mile = 6076 feet). The water beneath a surface rectangle 3.70 nautical miles by 2.80

    asked by S on September 13, 2014
  62. Chemistry

    You start with a 20ml mixture of two compounds. After distillation you end up with 10ml of distillate 1 and 8.4ml of distillate 2. What is the relative volume percent of each compound in the pre-distilled mixture? (Do I just do: volume percent of

    asked by Danny on March 14, 2016
  63. Geometry

    What is the scale factor of a rectangular prism that s volume is half the original volume? Pear-Apple scraps their plans for the BigMini and the Lil Mini. They decide to come up with a product that is half the volume of the iPad Mini. It’s called the

    asked by Rose on May 21, 2018
  64. Calculus

    Hi there i am having some problems trying to do my calculus homework and i really need help on how to show the step to proof the volume of a sphere which is V= 4/3pirsquare. But I have to use triple integral to proof the volume of a sphere. Please help me

    asked by shylo on November 25, 2009
  65. thermodynamics

    Two kilograms of an ideal gas undergoes an isentropic process from 670 KPag and a volume of 0.80 cubic meter to a final volume of 0.51 cubic meter. If constant pressure is 0.5215 and constant volume is 0.3152 KJ/kgK, what are (a) final temperature,

    asked by hermie on November 29, 2011
  66. Chemistry

    A 110.-g sample of copper (specific heat capacity = 0.20 J/°C · g) is heated to 82.4°C and then placed in a container of water at 22.3°C. The final temperature of the water and copper is 23.5°C. What is the mass of the water in the container, assuming

    asked by Brittney on July 11, 2011
  67. Financial

    5) Combined leverage is concerned with the relationship between A. changes in volume and changes in EPS. B. changes in EBIT and changes in EPS. C. changes in volume and changes in EBIT. D. changes in EBIT and changes in net income. Answer (D) 6) The degree

    asked by kfc on November 20, 2009
  68. MLA citation

    Which type of writing assignment would benefit the most from the use of outside sources? A. The first act of a play about John F. Kennedy B. An essay describing your favorite kind of automobile C. An informative essay about the transformation of a

    asked by Daniela on July 27, 2015
  69. Organic Chemistry

    An impure sample contains 0.95g of benzoic acid and 0.05 of salicylic acid. Solubilities in water of the two compounds are given in the following table. Solubility at 20 degrees (g/10mL) benzoic acid: 0.029 salicylic acid: 0.22 Solubility at 100 degrees

    asked by Anna on January 11, 2012
  70. physics

    A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.10 m/s and her body makes an angle of 77.0° with respect to the horizontal surface of the water. Determine her initial velocity,

    asked by james on February 8, 2010
  71. REALLY HARD CALCULUS PROBLEMMMM PLEASE HELP ME???

    A circular swimming pool has a diameter of 16 m, the sides are 3 m high, and the depth of the water is 2.5 m. How much work (in Joules) is required to pump all of the water over the side? (The acceleration due to gravity is 9.8 m/s 2 and the density of

    asked by Sarah with an 'H' on October 15, 2014
  72. physics

    A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.30 m/s and her body makes an angle of 83.0° with respect to the horizontal surface of the water. Determine her initial velocity,

    asked by help on February 7, 2011
  73. Physics- Algebra based

    A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.10 m/s and her body makes an angle of 80.0° with respect to the horizontal surface of the water. Determine her initial velocity,

    asked by Bailey on February 5, 2011
  74. Chemistry

    Sally Scientist is trying to determine Avogadro's number using a procedure analogous to that in Experiment 4. She fills a watchglass with diameter 11.9 cm with water and is trying to create a monolayer of stearic acid on the top of the water. What is the

    asked by Mindy on February 7, 2010
  75. physics

    A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.00 m/s and her body makes an angle of 71.0° with respect to the horizontal surface of the water. Determine her initial velocity,

    asked by tom on November 3, 2010
  76. Physics

    A diver springs upward from a board that is 3.00 m above the water. At the instant she contacts the water her speed is 8.90 m/s and her body makes an angle of 75.0 degrees with respect to the horizontal surface of the water. Determine her initial velocity

    asked by Anonymous on September 23, 2010
  77. physics

    a 25000000 gr rocket is propelled from rest by an engine that produces a 312500 kgm/s2 for 1.375s A) What is the sleds acceleration? B) What is the velocity after 1.375s?

    asked by bob on March 7, 2012
  78. physics

    (1) a car travelling at a constant speed of 20ms-1 overcomes a constant frictional resistance of 300N. What is the horse power of the engine? ( take 1h.p = 3/4 kw)

    asked by samuel on November 21, 2016
  79. physics

    the hammer of a pile driver weighs 3800N and must be lifted vertically 2.80 m at constant speed in 4.00 s . What horsepower must the engine provide to the hammer?

    asked by colleen on August 22, 2009
  80. Physics

    A 69990 kg locomotive is traveling at 9.86 m/s when its engine and brakes both fail. How far will the locomotive roll before it comes to a stop? (The coefficient of rolling friction is 0.002.)

    asked by Student on January 23, 2013
  81. Chemistry

    When doing a simple distillation of ethanol-water, is the vapor pure ethanol or does it also contain water? (knowing that ethanol has lower boiling point than water) If it is not pure ethanol, why is it not possible to separate water & ethanol completely?

    asked by Namie on January 5, 2012
  82. chamistry

    formula: 2Cl- ==> Cl2 + 2e- in one experiment, the volume of chlorine gas formed was 18cm3. i) calculate the amount, in moles, of chlorine gas in 18cm3.(the volume of 1 mol of a gas at room temperature and pressure is 24000) ii) calculate the quantity of

    asked by laura on February 19, 2016
  83. Computer Literacy

    A strong search strategy for a search engine would include which of the following?

    asked by Anonymous on April 4, 2013
  84. literacy

    which search engine would be best to use for a broad search for scholarly literature

    asked by which of the following is an article from a popular magazine on October 8, 2012
  85. internet basic

    All of the following search engines are meta-search engine with the exception of

    asked by coral on June 12, 2014
  86. english FIXED

    original thread: cgi?id=1330376726 1. Water is the source of life. We all depend on it. Water is important, and we cannot survive a week without it. 2. Water should be free; it is a basic need for living. We should not consider buying bottled water. 3.

    asked by ESLstudent on February 27, 2012
  87. Marketing

    Explain why fixed and variable costs per unit decline as sales volume increases. Suppose a company had a variable cost/unit of $20 at a cumulative volume of 20,000 units. What would be their approximate variable cost per unit when they had produced 40,000

    asked by Charles on December 9, 2009
  88. AP Chemistry

    A mixture of aluminum and zinc metal is used in 2 experiments described below: A- A 1.7 gram sample of the mixture is reacted with excess hydrochloric acid and the resulting hydrogen gas is collected over water. The reaction takes place at 750 mm Hg

    asked by Kate on April 3, 2011
  89. chemistry

    Electrolysis of water produces hydrogen gas and oxygen gas, which can be collected over water: 2H2O(l) → 2H2(g) + O2(g) An electrolysis reaction at 735 mmHg pressure produced 25.00L of gas at 25°C; at which point, the vapor pressure of water is 23.76

    asked by Lay on October 14, 2015
  90. chemisry

    What are the specializations of sanitary engineering? Drinking water supply Sewage Wastewater treatment 2) Name the different parts of the drinking water supply system? Production Storage Distribution 3) Which of the following three systems can be

    asked by Anonymous on September 24, 2013
  91. Chemistry

    Calculate the molarity of the solutions made by dissolving the following amounts of solute in water and making the volume up to the stated value. 5.0mol nitric acid in 2.0L Do I just find the molarity for nitric acid only, because when I write out the

    asked by Jiskhaa on August 28, 2012
  92. Chemistry

    A sample of 7.52 grams of Na OH is dissolved into 675 mL of aqueous M NaOH (assume no volume change). This solution is then poured into 1.95 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the

    asked by Cheyenne on September 24, 2010
  93. Biochemistry

    A buffer solution is prepared by mixing 2.50 mL of 2.00M sodium acetate with 3.30mL of 0.500M HCl and diluting the buffer with water to a final volume of 500.0mL. pK acetic acid: 4.76 what is ph of buffer? what is final concentration of buffer?

    asked by Maria on February 4, 2014
  94. Math

    A marine biologist is testing a new under water probe. The probe is catapulted from the ship into the air, descends under water to a predetermined depth, and then returns to the surface where it can be collected. The function that models the probe’s path

    asked by Ryan on October 30, 2014
  95. chemistry

    is that a -56? Dr. BOb. thank you When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17 degrees C. Calculate delta H of this reaction. (Assume that the total volume is the sum of the

    asked by patrick on October 17, 2015
  96. chemistry-Dr Bob

    is that a -56? Dr. BOb. thank you When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17 degrees C. Calculate delta H of this reaction. (Assume that the total volume is the sum of the

    asked by patrick on October 18, 2015
  97. Science/Anatomy

    I have the formula to the problem but am unsure of my answer.. Problem: Calculate the cardiac output if heart rate (HR) is 90 beats per minute, stroke volume (SV) is 110 ml/beat, end diastolic volume (EDV) is 140 ml, and end systolic volume (ESV) is 30 ml.

    asked by Mary/please help on June 6, 2016
  98. physics

    1- a pipe of diamter 1cm carreiers water flowing at 1m/s. the end of the pipe is bplugged and there is a small holeon the top as shown which is 1mm diameter. How high does the water go? *=hole ()____________*___() 2. you're indoors, with a door 1m wide and

    asked by Devin on December 6, 2006
  99. physics

    Two copper cylinders, immersed in a water tank at 46.3°C contain helium and nitrogen, respectively. The helium-filled cylinder has a volume twice as large as the nitrogen-filled cylinder. a) Calculate the average kinetic energy of a helium molecule at

    asked by maria on January 1, 2012
  100. physics

    Two copper cylinders, immersed in a water tank at 46.3°C contain helium and nitrogen, respectively. The helium-filled cylinder has a volume twice as large as the nitrogen-filled cylinder. a) Calculate the average kinetic energy of a helium molecule at

    asked by maria on January 3, 2012