Cristian

Most popular questions and responses by Cristian
  1. Chemistry

    How much 5M KOH must be added to 1.0 L of 0.1M glycine (pKa 9.6) at pH 9.0 to bring its pH to exactly 10.0?

    asked on February 27, 2013
  2. Math

    In the following figure , triangle abc and triangle DEF are similar. What is the value of x You would know if u go to connections Academy

    asked on March 12, 2019
  3. physics

    When two objects move uniformly toward each other, they get 3.0 m closer each second, and when they move uniformly in the same direction with their original speeds, they get 1.0 m closer each 17 seconds. What is the speed (in meters/second) of the faster

    asked on February 21, 2013
  4. Chemistry

    N2O5 + H2O ---> 2HNO3 The reaction is first order in each reactant. Write the rate law for the reaction my guess rate= k[N2O5]^1[H2O]^1

    asked on December 11, 2012
  5. math

    Keisha invested her savings in two investment funds. The $4000 that she invested in Fund A returned a 10% profit. The amount that she invested in Fund B returned a 3% profit. How much did she invest in Fund B, if both funds together returned a 7% profit?

    asked on December 9, 2015
  6. Physics

    A figure shows a section of a long tube that narrows near its open end to a diameter of 1.0 mm. Water at 20 degrees celsius flows out of the open end at 0.020 L/s. What is the gauge pressure at point P, where the diameter is 4.0 mm?

    asked on November 27, 2012
  7. 9th grade physics

    A sled of mass 50 kg is pulled along a snow-covered, flat surface with a force of 200 N. the friction force acting on the sled is 49 N. what is the acceleration?

    asked on November 17, 2010
  8. Algebra NEED HELP ASAP!!!!!!

    The temperature outside was 72 degrees at 6 am. The temperature rose 4 degrees per hour for the next 12 hours. The total temperature is a function of the number of hours the temperature rose. What was the temperature at noon? (write the equation as a

    asked on November 20, 2013
  9. Chemistry

    how would you prepare 500 ml of .2M solution starting with solid NaH2PO4*H20?

    asked on September 26, 2012
  10. Biology

    When making comparison of sequences where some are whole genome sequences while others are partial genome sequences, or a specific glycoprotein sequence, How is it that we are able to make comparisons from these sequences if they all have different

    asked on April 21, 2013
  11. Algebra 1

    The temperature outside was 72 degrees at 6 am. The temperature rose 4 degrees per hour for the next 12 hours. The total temperature is a function of the number of hours the temperature rose. What was the temperature at noon? (also write an equation)

    asked on November 20, 2013
  12. biology

    is trypsin inhibitor competitive or noncompetitive

    asked on October 12, 2013
  13. college chemistry

    In the derivation of this expression: [ln]/[HIn]A# 2 * A#1,acid/A# 2,basic * A#1 We assumed that the HIn form of the indicator is the only form present in the most acidic solution. Is this a valid assumption? Why or why not? Support your answer by

    asked on October 1, 2012
  14. Chemistry

    a 110 g solid sample that is a mixture of CaCO3 and CaCl2 is reacted with 1.50 L of 1.45M HCl. Of the calcium salts, only calcium carbonate reacts with HCl- the reaction forms CaCl2 and CO2. The excess/unreacted HCl requires 0.850 L of 0.543 M NaOH to

    asked on December 3, 2012
  15. Algebra 1

    The temperature outside was 72 degrees at 6 am. The temperature rose 4 degrees per hour for the next 12 hours. The total temperature is a function of the number of hours the temperature rose. What was the temperature at noon? (write the equation as a

    asked on November 20, 2013
  16. Algebra 1

    The temperature outside was 72 degrees at 6 am. The temperature rose 4 degrees per hour for the next 12 hours. The total temperature is a function of the number of hours the temperature rose. What are the independent variable and dependent variable

    asked on November 20, 2013
  17. Cell Biology

    Suppose 1.00 ml of blood from a given donor contained 5 X 106 red blood cells and the donor’s hematocrit were 48%. Determine the surface area that the lipids extracted from the plasma membranes of red blood cells obtained from 10.0 ml blood would occupy

    asked on September 21, 2013
  18. Physics

    A rock is dropped from a height of 100 meters above the ground. One second later, a ball is thrown vertically downwards, from the same height, with an initial speed of 13 m/s. How long after the ball is thrown will the two objects be at the same location

    asked on February 27, 2013
  19. Chemistry

    What determines whether or not the majority of acid is in the protonated form in solution? How does this incorporate both the pH of the solution and the pka of the acid?

    asked on October 30, 2012
  20. geometry

    i need example of isometric drawing

    asked on September 2, 2010
  21. Physics

    Jogger A, with a mass of 55kg, is traveling 6.00m at 3.45 m/s in the positive x-direction. Jogger B, with a mass of 62kg, is traveling 3.00m at 4.23 m/s in the positive x-direction. Jogger C, with a mass of 72kg, is traveling 5.00m in the negative

    asked on September 28, 2015
  22. Statistics

    True or False: For ANOVA you will reject the null hypothesis is the variability within a sample is greater than the variability among samples?

    asked on December 15, 2013
  23. Chemistry

    How would you determine the concentration of H+, H2A and MB+ in a solution containing volumes of: H+ 600 microliters H2A 500 microliters MB+ 100 microliters H20 800 microliters

    asked on November 18, 2012
  24. Chemistry

    Which of the following will buffer near pH=9? a. 0.5M sodiumacetate/0.5M acetic acid b. 0.5M ammonium chloride/0.5M ammonia c. 0.5M sodium dihydrogen phosphate/0.5M hydrogen phosphate i think a) 0.5M sodiumacetate/0.5M acetic acid will buffer near pH=9

    asked on October 17, 2012
  25. Algebra (math)

    The temperature outside was 72 degrees at 6 am. The temperature rose 4 degrees per hour for the next 12 hours. The total temperature is a function of the number of hours the temperature rose. What was the temperature at noon?

    asked on November 20, 2013
  26. Biology

    Suppose 1.00 ml of blood from a given donor contained 5 X 106 red blood cells and the donor’s hematocrit were 48%. Determine the surface area that the lipids extracted from the plasma membranes of red blood cells obtained from 10.0 ml blood would occupy

    asked on September 22, 2013
  27. Physics

    A rock is dropped from a height of 100 meters above the ground. One second later, a ball is thrown vertically downwards, from the same height, with an initial speed of 13 m/s. How long after the ball is thrown will the two objects be at the same location

    asked on February 27, 2013
  28. chemistry

    Suppose a car's motor draws 231 Ampere of current for 6.3 sec to start the car. What mass of Pb is oxidized in the lead-acid battery to supply this much electricity?

    asked on December 2, 2012
  29. Chemistry

    why would a molecule change color under acidic or basic conditions?

    asked on October 23, 2012
  30. Chemistry

    In the derivation of this expression: [ln]/[HIn]A# 2 * A#1,acid/A# 2,basic * A#1 We assumed that the HIn form of the indicator is the only form present in the most acidic solution. Is this a valid assumption? Why or why not? Support your answer by

    asked on October 1, 2012
  31. physic

    if a ballon gets launched at 60mi/hr at an angle of 38 degrees. How far will it travel in meters?

    asked on September 15, 2010
  32. Chemistry

    Which of these methods is a better representation of the error in a chemical experiment: propagation of error or standard deviation and why? I think it would be standard deviation

    asked on October 9, 2012
  33. biologia

    que nombre recibe el sonido que emiten los murciélagos

    asked on July 5, 2012
  1. Art

    No name for u lol is right I got them both correct

    posted on March 7, 2019
  2. math help now plez

    Thanks still chill I clicked on the wrong one on 4

    posted on March 6, 2019
  3. Science

    Kitty is right

    posted on March 6, 2019
  4. Art

    My grade is down thanks to guys it C B C E A These are 100% correct promise

    posted on March 5, 2019
  5. science

    Thanks jack

    posted on March 4, 2019
  6. English

    first person

    posted on May 22, 2017
  7. Chemistry

    The response written by DrBob is correct. Using a substitution method with the y=1.0318x, substitute the y in the original formula for 1.0318x, and solve. Keep in mind that you must set z=63.5463 (or just 63.55), otherwise you cannot hope to solve for the

    posted on September 4, 2016
  8. Language Art

    sure did

    posted on January 7, 2016
  9. L.Arts

    Please I need to get a good score so my grades can go up a little more

    posted on January 6, 2016
  10. algebra

    The area is 16 because 4x+6=16

    posted on February 4, 2015
  11. algebra

    The area is 16

    posted on February 4, 2015
  12. Grammar

    Goon' someplace special" voc. I need please,, unscramble the words Osmentsona Cteors Idtiaiicnmsorn Nceotifdn Gneatrioesg

    posted on September 23, 2014
  13. Statistics

    thank you!

    posted on December 15, 2013
  14. Statistics

    so would it be true?

    posted on December 15, 2013
  15. Algebra NEED HELP ASAP!!!!!!

    thank you very much i appreciate it

    posted on November 20, 2013
  16. Algebra NEED HELP ASAP!!!!!!

    need help!!!!!!!!

    posted on November 20, 2013
  17. Algebra 1

    thank u

    posted on November 20, 2013
  18. unit rate

    $60over 5 lessons divide by one in5 lessons

    posted on January 2, 2013
  19. chemistry

    Thanks!

    posted on December 3, 2012
  20. Algebra

    x-4y=-3 2x+8y=-9

    posted on November 20, 2012
  21. Chemistry

    Molar concentrations: H+= .1M H2A= .100M MB+= 2.00X10^-4

    posted on November 18, 2012
  22. math

    y-2= -1/2 (x-4)

    posted on March 28, 2012
  23. history project

    That's me too, right? XD

    posted on October 10, 2011
  24. history project

    Ms. Sue are you a real-life teacher?c:

    posted on October 10, 2011
  25. history project

    Immigration is when a person (immigrant) moves from their home country to another country in hopes of pursuing a better life.(:

    posted on October 10, 2011
  26. Thomas Pullen

    37! :D

    posted on October 10, 2011
  27. algebra

    Lol jk. I don't know the answer..I don't feel like doing math..D:

    posted on October 10, 2011
  28. algebra

    I know the answer but you don't...suck that!(:

    posted on October 10, 2011
  29. social studies

    I think so and wouldn't this be in "Biology"?

    posted on October 10, 2011
  30. math

    When the problem has the words "about" or "round" or anything relatively close to that in it, I think that's a good time to estimate. Otherwise, use exact numbers, (:

    posted on October 10, 2011
  31. Physics

    Mass Does not need to be used.

    posted on January 19, 2011