duke

Most popular questions and responses by duke
  1. chemistry

    Information Set 4: Consider the reaction between 500 mL of 0.100 mol L–1 Pb(NO3)2(aq) and 500 mL of 0.200 mol L–1Na2CrO4(aq).  Ksp for PbCrO4 (s) is 2.8 x 10–13. What volume of 0.100 mol L–1 lead nitrate solution would give the necessary

    asked on June 9, 2016
  2. physics

    A steel rod of length 1m is heated from 25°c to 75°c keeping its length constant.The longitudinal strain developed in the rod is:(steel:12 X 10^-6/°c) "6X10^-4" ; "-6X10^-4" ; "0" please help me as soon as possible by explain this.

    asked on May 14, 2013
  3. General Chemistry

    I have been going at part B of this problem for a few hours. I've completed an ice table and calculated the total number of moles based off pressure but am still unable to come up with the partial pressures. If someone could provide the steps for solving I

    asked on January 28, 2016
  4. physics

    A cannon tilted up at a 26.0 degree angle fires a cannon ball at 78.0 m/s from atop a 12.0 m-high fortress wall. What is the ball's impact speed on the ground below?

    asked on March 21, 2011
  5. physics/chemistry(Thermodynamics)!!!!!helppppp!

    In a certain chemical process,a lab technician supplies 254 j of heat to a system. At the same time,73 j of work are done on the system by iys surroundings.What is the increase in the internal energy of the system?

    asked on May 15, 2013
  6. Maths

    A plane flies northward for 430km, it then flies eastwards for 380km.How far is it from the starting point?

    asked on June 16, 2018
  7. science linear prog

    A small farm in Illinois has 110 acres of land available on which to grow corn and soybeans. The following table shows the cultivation cost per acre, the labor cost per acre, and the expected profit per acre. The column on the right shows the amount of

    asked on October 25, 2013
  8. Chemistry

    A 5.00 mL sample of an aqueous solution of H3PO4 requires 43.2mL of 0.285M NaOH to convert all of the H3PO4 to Na2HPO4. The other product of the reaction is water. Calculate the molarity of the H3PO4 solution.

    asked on October 26, 2014
  9. science linear equation

    A theater is presenting a program on drinking and driving for students and their parents. The proceeds will be donated to a local alcohol information center. Admission is $18 for parents and $9 for students. However, this situation has two constraints: The

    asked on October 25, 2013
  10. Maths

    A plane flies northward for 430km, it then flies eastwards for 380km.How far is it from the starting point?

    asked on June 15, 2018
  11. waist water treatment

    1/Why do the following components need to be removed from sewage under current law before it can be discharged on the surface water? Nitrogen Algea growth in receiving water Growth of waterborne diseases Turbidity increase of receiving water Oxygen

    asked on November 18, 2013
  12. physics

    A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true?

    asked on April 18, 2014
  13. physics/chemistry(kinetic ..gasses)

    How many degreed of freedom have the gas molecules,if under standard conditions the gas dendity is 1.3kg/m^3 and velocity of sound propagation on it is v=330m/s?

    asked on May 13, 2013
  14. 4TH grade

    what are the major land biomes

    asked on January 19, 2009
  15. life science

    how do I create a concept map using the following: animal call, glucose, oxygen, carbon dioxide, atp, mitochondria, and cellular respiration?

    asked on November 9, 2008
  16. Math

    1200=500/x + 500/x^2 + 500/x^3 + 500/x^4

    asked on June 6, 2013
  17. math

    mary color a picture with colored marker. she used red 2 times blue 3 times yellow 6 times orange 1 time and green 1 time. what fraction of the time did mary use yellow?

    asked on February 25, 2013
  18. Chemistry

    Calculate the molarity of the H3PO4 solution?This the question Answer has to be: MH3PO4 = ? mol/L but I don't know how to calculate it. Thanks for help so far

    asked on October 26, 2014
  19. 4TH grade

    if your geting a bank loan of 100,000 how much would you be getting payed

    asked on November 13, 2008
  1. english

    kit is correct

    posted on October 23, 2017
  2. math

    1.33333

    posted on May 15, 2017
  3. Geometry

    Its A

    posted on May 27, 2016
  4. chemistry

    experiment 1 on latenightlab

    posted on May 24, 2016
  5. math

    .03

    posted on May 31, 2015
  6. spelling

    duke

    posted on November 12, 2014
  7. waist water treatment

    Algea growth in receiving water Phosphorus (wrong) Oxygen depletion of receiving water Suspended solids (wrong) Suspended solids Turbidity increase of receiving water Pathogens Growth of waterborne diseases true.

    posted on November 20, 2013
  8. physics/chemistry(kinetic ..gasses)

    Please help...

    posted on May 13, 2013
  9. 4TH grade

    thanks i will try

    posted on January 19, 2009
  10. Kindergarten trip sheet

    make some slides

    posted on January 19, 2009
  11. 2nd grade

    i don`t know and r u sure your in 2nd grade

    posted on January 19, 2009
  12. 2nd grade

    chair of i don`t no what ur taking about is it a desk

    posted on November 10, 2008
  13. S.S

    how should i know! :)

    posted on November 10, 2008
  14. life science

    animal cell

    posted on November 9, 2008
  15. science

    just because they do

    posted on November 9, 2008
  16. life science

    animal cell sorry

    posted on November 9, 2008