Tuesday
December 6, 2016

# Posts by duke

Total # Posts: 32

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 ...
June 9, 2016

G
Its A
May 13, 2016

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 would appreciate...
January 28, 2016

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
October 26, 2014

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.
October 26, 2014

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?
April 18, 2014

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.
November 18, 2013

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 depletion of receiving water...
November 18, 2013

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 money available for each...
October 25, 2013

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 theater can hold no ...
October 25, 2013

Math
1200=500/x + 500/x^2 + 500/x^3 + 500/x^4
June 6, 2013

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?
May 15, 2013

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.
May 14, 2013

physics/chemistry(kinetic ..gasses)
May 13, 2013

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?
May 13, 2013

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?
February 25, 2013

chemistry
experiment 1 on latenightlab
January 19, 2012

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?
March 21, 2011

thanks i will try
January 19, 2009

what are the major land biomes
January 19, 2009

December 17, 2008

if your geting a bank loan of 100,000 how much would you be getting payed
November 13, 2008

science
just because they do
November 9, 2008

life science
animal cell sorry
November 9, 2008

life science
animal cell
November 9, 2008

life science
how do I create a concept map using the following: animal call, glucose, oxygen, carbon dioxide, atp, mitochondria, and cellular respiration?
November 9, 2008

S.S
how should i know! :)
November 9, 2008