1. Chem.

    Convert 512 ft to km. Anyone know how to do this, please? There are 3281 feet/km. In order to get it in km, you have to divide... 512/3281 = Thank you! yo this is fo reak dawg 512ft(1km/3218ft) ft cancel eachother out n u are left with km .15605km

    asked by Frank on October 22, 2006
  2. Chemistry

    I need help on these three questions. For all three of them you're supposed to write a balanced equation for each neutralization. Then, to find the concentrations of the unknown solutions if the following reactions are found to reach equivalence by

    asked by Molly on June 9, 2014
  3. physics

    a pipe of length 1.00 m and open at both ends is lying on the ground at a construction site on a windy day of temperature 20 degrees C. Justin notices that the pipe is resonating and creating a sound of a particular frequency, the fundamental frequency. a)

    asked by cindy on February 20, 2011
  4. AP Chemistry

    There is an unknown amount of unlabelled monoprotic acid in an unknown amount of water titrated with a sample with a solution of NaOH of unknown molarity. After adding 10.0 mL of NaOH, the pH=5.0. The equivalence point is 32.22 mL of NaOH. What is the Ka?

    asked by Ben on March 8, 2011
  5. physics

    When light of wavelength 495 nm passes through a single slit of unknown width, the diffraction pattern displays a fourth-order maximum where the third minimum of light of an unknown wavelength had been observed to fall. What is the unknown wavelength?

    asked by jibjab on March 29, 2010
  6. Physics

    Two identical violin strings, when i tune and stretched with the same tension, have a fundamental frequency of 440Hz. One of the strings is retuned by adjusting the tension. When both strings are pluckes simultaneously, after one has been retuned, 1.5

    asked by Amanda on March 29, 2008
  7. Math

    The following data set gives the difference between the winning and? losing scores in 50 randomly observed high school basketball games: 2, 12, 1, 2, 12, 5, 14, 2, 45, 9, 1, 8, 18, 28, 9, 4, 30, 16, 4, 12, 8, 13, 20, 9, 17, 13, 49, 17, 13, 4, 14, 2, 12,

    asked by Anonymous on November 1, 2009
  8. Word Problem

    The following data set gives the difference between the winning and? losing scores in 50 randomly observed high school basketball games: 2, 12, 1, 2, 12, 5, 14, 2, 45, 9, 1, 8, 18, 28, 9, 4, 30, 16, 4, 12, 8, 13, 20, 9, 17, 13, 49, 17, 13, 4, 14, 2, 12,

    asked by Anonymous on October 27, 2009
  9. Organic Chemistry

    For molecular vibrations, the frequency of a stretching vibration is given by the following equation: Frequency (wavenumber) = 4.12 × √(K/) where K is the force constant of the bond and  (reduced mass) = (m1m2)/(m1+m2), where m is the mass of the

    asked by Nathaly on January 28, 2019
  10. 9thGrade Comp Lit

    Does this sound right? The second band sounded so cacophonit? I need the sentence to include the word Cacophony.

    asked by Alana on August 30, 2011
  11. Newspaper 1935

    What should I title the adverstiement section of the newspaper? It has to be titled... I was going to do Adverstiments but it sounded boring...

    asked by Amy~ on June 9, 2010
  12. Physics - sound

    How can one recognise the beat frequency from a graph? Why is the beat frequency equal to the difference of the frequency of the two waves?

    asked by Hannah on March 7, 2016
  13. math

    Carolyn tested a coin to see if it was evenly weighted. She flipped the coin 100 times and came up with 42 heads and 58 tails. How does the relative frequency of tails to heads compare to the probability of tails in this experiment? A. The relative

    asked by bubbie on June 8, 2013
  14. Chemistry

    After you preform your experiment, you determine that the Kf value for naphthalene is 6.89 °C/m . You are using 10g of naphthalene and added 1.0 g of your unknown. The the freezing point of the solvent decreased by 4.42 °C when the unknown was added.

    asked by Claire on September 11, 2016
  15. chemistry

    After you preform your experiment, you determine that the Kf value for naphthalene is 6.9 . You are using 10g of naphthalene and added 1.0 g of your unknown. The the freezing point of the solvent decreased by 4.42 when the unknown was added. Knowing this

    asked by hannah on July 17, 2011
  16. phy

    At a factory, a noon whistle is sounding with a frequency of 484 Hz. As a car traveling at 77 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the factory, the driver hears frequency ff. What is the change in

    asked by kira on April 12, 2013
  17. Science please answer?

    what is the wavelength and frequency if the wavelengthis4.5x10-7 Show wok please (-7) You have already stated the frequency. Are you talking about light? What are the units of wavelength? meters? cm? feet/ frequency = (wave speed)/(wavelength) You can do

    asked by Brooke on November 28, 2006
  18. English

    Chinese sounded *pedestrian* I’m thinking the answer is D. A. Musical B. Smoothing C. Common D. Abrasive

    asked by Izzy on April 25, 2019
  19. Chemistry

    I did a lab for Organic Chemistry I did a simple distillation for an unknown and found that it boiled at 76 degrees. I also found out that the unknown was ethanol since we knew what the 4 possibilities were and mine was closest to ethanol. I also did a

    asked by Omar on October 6, 2010
  20. Chemistry

    What is the energy in Joules of a mole of photons of microwave light having a frequency typical of microwave? (frequency = 3.0 x 10^9 Hz) I tried using the equation E= h x frequency, but I ended up with the answer 1.98 x 10^-24 instead of the correct

    asked by Sarah on November 14, 2012
  21. Social Studies

    Scientists predict that global warming will cause Ethiopia to experience a- greater amounts of heavy precipitation b- greater frequency of earthquakes c- greater frequency of hurricanes d- greater frequency of drought-related conditions***

    asked by Kaai97 on January 14, 2016
  22. PHYSICS

    an open tube is .86m long. Find the fundamental frequency and frequency of the next harmonic if the Temp=10deg celcius also if you closed one end of the tube what would the new fundamental frequency be?

    asked by shan on March 24, 2008
  23. science (physics)

    what is a cut off frequency and it's application? I need the application explaination more then the definition of cut off frequency!!! Wouldn't it be nice to have a chip that detected blue light, but not red? Could cutoff frequency be used? Of course is

    asked by Kat on September 21, 2006
  24. Chemistry

    A gas mixture is made by combining 7.2 g each of Ar, Ne, and an unknown diatomic gas. At STP, the mixture occupies a volume of 14.30 L. What is the molar mass of the unknown gas? Identify the unknown gas.

    asked by Ashley on May 25, 2017
  25. physics

    Two identical sources S1 and S2 are moving towards an observer P. The two sound sources S1 and S2 produce notes of frequency 500hz. If the speed of S1 and S2 are 20ms-1 and 23ms-1 respectively, calculate the beat frequency heard by P. (Speed of sound =

    asked by shu yan on October 16, 2015
  26. Physics

    The wavelength of red light is about 7x10^-7m. The frequency of the red light reflected from a metal surface and the frequency of the vibrating electron that products it are the same. What is this frequency?

    asked by sh on February 12, 2010
  27. Physics

    1. A train whistle has a frequency of 1000 Hz. If the train is speeding at a velocity of 60 km/h past a stationary railroad crossing attendant, what is the apparent frequency a) as the train approaches him, b) as it moves away from him? Assume speed of

    asked by James on November 26, 2009
  28. math

    "Relative frequency" is the same as which of the following? frequency histogram cumulative frequency distribution proportion I think its proportion, am I right?

    asked by Mariam on September 20, 2017
  29. Physics

    A train blows its horn as it approaches a crossing. A.) if the train engineer observes a frequency of 125Hz and a stationary observer at the crossing observes a frequency of 132Hz, what is the speed of the train? (The speed of sound is 330m/sec on this

    asked by Jared on March 27, 2017
  30. Genetics

    β-thalassemia is a human genetic disease that is inherited in an autosomal recessive manner. Individuals with β-thalassemia produce abnormal hemoglobin which results in a reduced ability to carry oxygen in their blood. The severity of symptoms depends on

    asked by qwerty on March 27, 2013
  31. Chemistry

    A 0.750 g sample of an unknown solid is dissolved in 100 mL of water and acidfied with 25 mL of 3 M H2SO4 then titrated with a 0.0200 M KMnO4 solution. If the unknown solid requires 12.5 mL of the KMnO4 solution to reach the endpoint, what is the % sodium

    asked by Aaron on April 9, 2013
  32. Fluid Mechanics

    A cylinder with internal diameter of 5cm and 15 cm high is filled up with an unknown substance. The mass of the cylinder is 4.6 kg which is 300% of the unknown substance mass. Determine the density and the specific gravity of the unknown substance.

    asked by Lara on September 21, 2014
  33. math

    five times an unknown number decreased by the same unknown number is less than the opposite of the sum of the unknown number and five

    asked by anonymous on April 26, 2009
  34. Algebra 2

    The frequency of a radio wave is inversely proportional to the wavelength. If a wave 250 m long has a frequency of about 1200 kHz, what is the approximate length of a wave with a frequency of 800 kHz? A. 167 m B. 258 m C. 325 m D. 375 m

    asked by Lauren on March 28, 2011
  35. Physics: Wave Motion

    A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker

    asked by Raj Phys27/11 on November 27, 2012
  36. Physics

    A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker

    asked by Raju on November 27, 2012
  37. Physics

    A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker

    asked by Raju on November 27, 2012
  38. Physics

    A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker

    asked by Raj Phys27/11 on November 27, 2012
  39. Physics:Wave Motion

    A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker

    asked by RajuPhys on November 28, 2012
  40. physical

    You are traveling in a car toward a hill at a speed of 42.1 mph. The car's horn emits sound waves of frequency 251 Hz, which move with a speed of 343 m/s. a) Determine the frequency with which the waves strike the hill. b) What is the frequency of the

    asked by itufizik on July 16, 2012
  41. physics

    You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound

    asked by sara on March 31, 2012
  42. Hydrodynamics

    Natural frequency of the sloshing water in a swimming pool of a cruiser ship is studied by an experimental set up with a scale of 1/10. If the natural frequency is found 3.5 Hz, then what is the natural frequency for full scale?

    asked by Cagri on February 20, 2014
  43. Sloshing water frequency

    Natural frequency of the sloshing water in a swimming pool of a cruiser ship is studied by an experimental set up with a scale of 1/10. If the natural frequency is found 3.5 Hz, then what is the natural frequency for full scale?

    asked by Cagri on February 20, 2014
  44. Physics

    Calculate the frequency of an electron traveling at 1.85 X 10^7 m/s. Since the velocity and mass of the electron are known, I tried to use the De Broglie wavelength formula: let L = lambda, h = plancks constant L = h/mv and I got 3.94*10^-11 for the

    asked by Stesson on January 21, 2018
  45. science

    How do I use the fact that each element has a different set of energy levels to explain why the colour of the light emitted by an element in the gaseous state is characteristic of the element? Energy affects frequency and frequency determines wavelenght.

    asked by laura on March 15, 2007
  46. physics

    A .524kg object is tied down to the bottom of a container which container an unknown fluid. the tension in the rope is 38.5N. the object displaces .00735m3 of unknown fluid. Find the density of the unknown fluid.

    asked by Amie J. on November 20, 2016
  47. Chemistry

    Lab: Titration of NaOH (0.1 molar)to unknown solid acid. Trying to determine the equilivent weight of the unknown acid in the experiement. I am trying to figure out if I add too much base solution by accident to an unknown acid during titration would it

    asked by Dee on September 26, 2012
  48. Physics

    Which of the following statements correctly describes the changes that occur in a sound wave, as it passes from cool air into warmer air? A) speed,wavelength and frequency all increase B) speed, wavelength increase; frequency decreases C) speed, wavelength

    asked by Kiki on November 28, 2014
  49. physics

    a source emits 1700Hz frequency travelling at a speed of 70m/s. A detector is placed 200m away. What is the frequency detected by the detector when the source is closest to it? Also find the distance between them when the detector detects the frequency to

    asked by please Help urgentlyph on May 26, 2016
  50. English

    Can you please explain this to me in a simpler way. Thank you Metaphors are used to help us understand the unknown, because we use what we know in comparison with something we don't know to get a better understanding of the unknown.

    asked by Crystal on October 12, 2010
  51. math

    Find the Unknown length? ______________ 4 ft ______________x 15 ft my answer is 180 ft and the unknown side is 4 ft.

    asked by siulani perez on June 22, 2015
  52. Chemsitry

    Three unknown solutions were prepared by pipetting 15.00 mL of an unknown nickel solution into a 200.00 mL volumetric flask and diluting to the mark. Then three samples were prepared from this dilute unknown solution by pipetting 5.00 mL of the dilute

    asked by Christine on January 14, 2018
  53. Physics

    The wavelength in air of a sound is 5 m. (a) What is the frequency of the sound? Sound can have any frequency. It is the SPEED of sound that remains constant, independent of frequency, at a given temperature.

    asked by Courtney on March 1, 2007
  54. Math

    What is the cube of 8?     A. 512 B. 24 C. 64 D. 2 C?

    asked by Brooklyn on August 27, 2015
  55. pre-cal

    (576^1/2+512^1/3)^1/3

    asked by Soto on May 31, 2010
  56. MATH

    how do you factor x^6+512?

    asked by Mario on September 13, 2009
  57. chemistry

    A solution which contains 40.3 g of an unknown molecular compound in 360 g of water freezes at -5.07°C. What is the molar mass of the unknown?

    asked by paul on November 26, 2012
  58. english

    that the alarm,traditionally sounded to avert danger,became the apparent cause of the avalanche is an example of: a)exaggeration b)irony c)personification d)satire e)simile

    asked by yaz on October 9, 2007
  59. physics

    Which one of these statements regarding standing waves on a string is FALSE Select one: a. The frequency of the first harmonic depends on the tension in the string b. The frequency of the first harmonic depends on the speed of the wave c. The frequency

    asked by jake on June 16, 2014
  60. 7th grade Math quick help Ms. Sue

    Can you check to see if tese are right? 1. What is 0.68 written as a simplified fraction? 68/100 17/25 100/68 34/25 2. Mrs. Whimsey’s class is having a pizza party. If there are 16 students and 4 pizzas cut into 8 slices, what answer choice represents

    asked by Delilah on October 3, 2012
  61. Chemistry

    Exactly 5.02 grams of an unknown gas was sealed in a 3.0L flask at 37 degrees celsius and a pressure of 1.25 atm. Which on of the following is most likely to be the unknown? I am not sure how to start this.

    asked by Hannah on January 15, 2012
  62. English

    Hello. I will really appreciate your help. 1) Is it possible to use "unknown" in the following context: "It is still unknown what effect the accident will have on the world."? 2)Is it possible to use "include" in the sentence: "The organization includes 62

    asked by Ilma on February 19, 2012
  63. chemistry

    0.82g of an unknown gass is at 30 degrees C in 3L container at a pressure of 15.9psi. What is the molecular weight of the unknown gas?

    asked by kendra on April 26, 2012
  64. Physics/Science/Psychology

    True or False: The frequency, amplitude and timber of a single auditory stream tend to change rapidly during a short period of time. If a sound is play at one frequency and another one played at the opposite frequency, what happens to the sounds? Dealing

    asked by Amy on May 2, 2019
  65. organic chemistry

    i'm having trouble figuring out my unknown compound. The elemental analysis is 87.28%carbon and 12.72% hydrogen for my unknown liquid, and for my solid unknown the elemental analysis is 79.22% carbon and 5.7% hydrogen and 15.98% oxygen. I'm not able to

    asked by susan on August 19, 2009
  66. chemistry

    3) The melting point range of an unknown substance was determined to be 120-180 degree celcius. what can you tell about the purity of the unknown

    asked by ama on July 18, 2012
  67. Physics

    If centripetal force on an object in uniform circular motion is increased what is the effect on frequency of rotation if radius is constant. What is the effect on frequency and radius if both are free to vary. If veloicty increases, period is decreased, so

    asked by Steve on June 18, 2007
  68. Science

    Does increasing the frequency of a wave also increase its wavelength? If not, how are these quantities related? high frequency. low wavelength That answer may be confusing. A high frequency has a short wavelength; i.e., 14 MHz is about 40 meters. 28 MHz is

    asked by Tammy on January 30, 2007
  69. MATHS

    Town Y and town Z were 512km apart. Car A left Town Y for town Z at a speed of 32km/h. An hour later, car B left Town Z for Town Y at twice of car A's speed. How long would it take for the two cars to pass each other after Car A left Town Y? Please check

    asked by Roxy on September 30, 2018
  70. math

    Evaluate the expression 6³√-512+13???HELP...

    asked by bella on December 10, 2015
  71. Arithmetic

    Find the sum. 1 − 1/2+1/4-1/8+....-1/512

    asked by fabian on August 10, 2015
  72. General Chemistry

    A 15.0 ml sample of unknown HCL04 solution requires titration with 25.3 ml of 1.200 M NaOH to reach equivalence point. what is the unknown concentration?

    asked by MAX on December 14, 2010
  73. Physics

    A resitor of unknown resistance and a 35-omega resistor are connected across a 120-V emf device in such a way that an 11-A current flows. What is the value of the unknown reisistance?

    asked by John - PLEASE Help! on April 10, 2011
  74. college chemistry

    formt he diluted unknown concentration which i found to be 1.50mg/L i have to calculate the [Fe] in the PRIMARY unknown solution... that is placed in a 250mL volumetric flask

    asked by Anonymous on July 18, 2012
  75. chemistry

    a 2.55g sample of an unknown has a volume of 3.73 cm. what is the density of the unknown

    asked by joanne on December 10, 2012
  76. chemistry

    a 2.55g sample of an unknown has a volume of 3.73 cm. what is the density of the unknown

    asked by joanne on December 10, 2012
  77. math

    Can someone help me figure this out. The difference of two numbers is 80. The second is 8 less than 5 times the first. What are the two numbers? first write an equation 5x-8=y and then solve it Tiff gave you part of the solution. 5x-8=y However, there is

    asked by jessica on May 7, 2007
  78. Maths (quadratic equation) need help

    In an unknown fraction the denominator is one more than twice the numerator. When 2 1/10 is added to this fraction, the result is equal to the reciprocal of the unknown fraction. Find the unknown fraction. (Hint; the the numerator of the fraction to be the

    asked by Danny on May 31, 2016
  79. Physics

    Physics Question 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

    asked by CollegeKid on December 6, 2010
  80. Physics

    At a factory, a noon whistle is sounding with a frequency of 480 Hz. As a car traveling at 85 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the factory, the driver hears frequency ff. What is the change in

    asked by Armany on April 17, 2012
  81. Chemistry

    Three unknown solutions were prepared by pipetting 15.00 mL of an unknown nickel solution into a 200.00 mL volumetric flask and diluting to the mark. Then three samples were prepared from this dilute unknown solution by pipetting 5.00 mL of the dilute

    asked by Christine on January 14, 2018
  82. Physics

    A sound of constant frequency is produced by the siren on top of a firehouse. Compared to the frequency produced by the siren, the frequency heard by the fire fighter approaching the fire house is what?

    asked by Darren on April 2, 2019
  83. dual nature of matter & radiation

    Light of frequency 1.5 times the threshold frequency is incident on photo-sensitive material.If the frequency is halved & intensity is doubled,the photo current becomes 1. Quadrupled 2. Doubled 3. Halved 4. Zero

    asked by hriday on March 2, 2009
  84. Maths (probability)

    I have two relative frequencies for the same experiment done twice. A fair coin's been flipped 100 times with 56/100 as the relative frequency of Heads, and 500 more times with 252/500 as the relative frequency of heads. I'm now being asked the average

    asked by Hannelore on June 3, 2017
  85. Instrumental Chem Lab

    I am working on a HPLC lab where we are to determine the concentration of caffeine in two energy drinks. I am trying to figure out the concentrations but don't think I am doing it right. Below is the info from our chromatograms: Standard Caffeine peak area

    asked by Wheaties on April 16, 2011
  86. Physics

    If the TV draws a 150W of power, the dishwasher 1500 W of power and the computer 100 W of power, will a typical 15 A circuit breaker trip if they operate simultaneously on one line? Explain why. Isn't P= IV and P=I^2R and P- V^2/R So wouldn't that mean

    asked by Andrea on April 3, 2008
  87. Physics Urgent

    A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves

    asked by Sydney on November 8, 2010
  88. Physics Urgent

    A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves

    asked by Sydney on November 8, 2010
  89. chemistry

    You have a solution which contains an unknown concentration of an organic compound quinone O=CC4H4C=O and an unknown concentration of Pb2+ and Al3+. Explain how to determine the unknown concentrations of quinone, Pb2+ and Al3+.

    asked by ct on June 6, 2015
  90. statistics

    I have done an entire project based on football scores from a certain team over the last 3 years and I'm not sure what information I can get from my answers. Ive done a frequency distribution table, Ogive, Histogram,cumulative frequency table, frequency

    asked by Amy on December 16, 2013
  91. Statistics

    The frequency of an electromagnetic wave varies inversely with the wavelength. If a wavelength of 200 meters has a frequency of 800 kilocycles per second, what frequency will be associated with wave length of 400 meters?

    asked by Keonn'a on November 27, 2018
  92. Pre-Algebra

    1. What makes the statement true? 8^-2 =? A. 64 B. 16 C. -1/64 D. 1/64 2. What is the solution to (4 x 10^3) x (6 x 10^6), written in a scientific notation? A. 24 x 10^9 B. 2.4 x 10^9 C. 24 x 10^18 D. 2.4 x 10^10 3. What is 0.000000512 written in a

    asked by Lilith on September 30, 2015
  93. math(geometric series)

    which term of the sequence 18,12,8,.... is 512/729 is ?

    asked by Ana.... on December 19, 2016
  94. Identical compounds?

    Question: You and another student were each given an unknown compound. Both samples contained colorless material. You each used the same brand of commercially prepared TLC plate and developed the plates using the same solvent. Each of you obtained a single

    asked by Sheryl on October 13, 2006
  95. Physics Disaster XXP

    Had The Same Teacher For Physics And Ughh I Am Stuck. Notes Help Me A Lot So If Anyone Could Write A Few Or A Bunch Out That Would Be Awesome. I Am Not The Type Of A Person Who Minds Writing Down Notes;) Teacher Told Us About Work And That The Formula For

    asked by Fizzylicous on November 16, 2011
  96. Physics Disaster

    Had The Same Teacher For Physics And Ughh I Am Stuck. Notes Help Me A Lot So If Anyone Could Write A Few Or A Bunch Out That Would Be Awesome. I Am Not The Type Of A Person Who Minds Writing Down Notes;) Teacher Told Us About Work And That The Formula For

    asked by Fizzylicous on November 16, 2011
  97. Chemistry, pH, Buffers

    Please help!! Given this data: mass of unknown acid 1.4671g Volume of NaOH used in titration 18.47mL Concentration of the NaOH used 0.2403M pH of the original acid solution 2.16 pH of the final acid solution 3.49 Show me how do I calculate the Ka of the

    asked by Krina on April 2, 2012
  98. Statistics

    The relative frequency for a class is computed as: A. class width divided by class interval. B. class midpoint divided by the class frequency. C. class frequency divided by the interval. D. class frequency divided by the total frequency>

    asked by Tykrane on December 13, 2009
  99. Chemistry

    If 2moles of electrons are required to oxidize 1 mole of unknown, what is the molarity of the unknown solution Normality: 0.638 In this experiment: MnO4- is reduced to Mn2+

    asked by unknown on April 9, 2008
  100. art

    10th century copper sculpture illustrated work of artist peforming "giving tangible form to the unknown" the unknown case in this is what diety

    asked by Anonymous on August 3, 2011