helpp

Most popular questions and responses by helpp
  1. CHEMISTRY

    for the reaction system H2 + X2 2HX Kc = 24.4 at 300 K a system made up fron these components which is at equilibrium contains 0.150 moles of H2 and 0.600 moles of HX in a 3.00 liter. calculate the number of moles of X2 present at equilibrium.

    asked on October 26, 2011
  2. chemistry

    In a laboratory experiment, the density of a concentrated sugar solution was determined by measuring the volume of the solution and corresponding mass. Three students each made a set of measurements using a different balance and used the results to

    asked on August 30, 2008
  3. Chemistry

    At 60 celsius the value of Kw is 9.5x10^-14. considering this waht is the calculated value for the pOH of a 2.00x10^-3 M HCL solution at this temperature? the answer is 10.32 i do the -log and i get 11.31 please advice

    asked on October 26, 2011
  4. Physics

    A student ties a 600.0 g rock to a 1.50 m-long string and swings it around her head in a horizontal circle. At what angular speed (in rev/min) does the string tilt down at a 13.1° angle, assuming that the local acceleration due to gravity is -9.80 m/s2?

    asked on October 17, 2011
  5. CHEMISTRY

    If the OH ion concentration in an aqueous solution at 25 celsius is 3.4x10^-3 M the the H concentration in moles per liter in the same solution is? answers is 2.9x10^-12 i do the -log and i get 2.46 i don't know that else

    asked on October 26, 2011
  6. Physics

    A 6.80 g coin is placed 10.0 cm from the center of a turntable. The coin has a coefficient of static friction of 0.80 and a coefficient of kinetic friction of 0.60 with the turntable. The turntable's angular velocity slowly speeds up until the coin starts

    asked on October 17, 2011
  7. Physics

    A motorcycle with a mass of 350 kg is accelerated from rest to a velocity of 30 m/s by a force of 4000 N. calculate the distance over which this acceleration occurred.

    asked on April 19, 2011
  8. Chemistry

    Given the table of pKa values, at a pH of 3.5, which substance(s) exist predominantly in the non-protonated form? Acid pKa HNO3 -1.3 HSCN 4.0 HCN 9.4 HOCI 7.4

    asked on May 8, 2018
  9. english

    Is being overly skinny, not eating regularly or cosmetic surgery really appealing? Well, we're in a society where celebrities have taken over individuals' lives. That we as individuals don't have much pride in ourselves anymore . We have to put in our mind

    asked on February 2, 2016
  10. physics

    Vector C has a magnitude 25.8 m and is in the direction of the negative y axis. Vectors A and B are at angles α = 41.9° and β = 27.2° up from the x axis respectively. If the vector sum A B C = 0, what are the magnitudes of A and B?

    asked on June 1, 2013
  11. physics

    Vector C has a magnitude 25.8 m and is in the direction of the negative y axis. Vectors A and B are at angles α = 41.9° and β = 27.2° up from the x axis respectively. If the vector sum A B C = 0, what are the magnitudes of A and B?

    asked on June 1, 2013
  12. SCIENCE

    what bicycle parts help the downhill race bike and road race bike and why are they different from normal bikes?

    asked on February 28, 2013
  13. english 3

    11. Which one of the following statements is not true about the president Ratcliffe portrayed in The General History? He wasn't very popular. His judgment was weak in times of peril. He voluntarily turned over leadership to John Smith. He was greedy and

    asked on February 24, 2012
  14. english

    how's cosmetic surgery a bad addiction few sentences please

    asked on January 19, 2016
  15. Ap calculus

    Find the equation of the tangent line to the curve g(X)= 2cos(2X)/(3X) at the point x= pi/3

    asked on October 27, 2010
  1. ss

    I did that and it landed me here.

    posted on December 6, 2018
  2. english

    yh

    posted on February 2, 2016
  3. english

    no im doing revision at home

    posted on February 2, 2016
  4. english

    huh? why is it wrong

    posted on February 2, 2016
  5. english 3

    I wanted to check my answers but I guess not. Thanks anyways.

    posted on February 24, 2012
  6. CHEMISTRY

    ok thanks

    posted on October 26, 2011
  7. CHEMISTRY

    so i do the -log(3.4x10^-3)=2.46

    posted on October 26, 2011
  8. Chemistry

    ok thank you

    posted on October 26, 2011
  9. Physics

    It says it was incorrect even after I converted to rev/min

    posted on October 17, 2011