Tuesday
December 10, 2013

# Posts by Larry

Total # Posts: 636

Physics
A 2m radius uniform 50kg disk has an object of unknown moment of inertia screwed into its center. A constant external force of 200N is applied tangentially to the disk's rim. A constant torque due to kinetic friction of 180Nmrad is present throughout the motion. The system...

chemistry
Write a net equation for the reaction between aqueous solutions of NaNO2 and NaH2PO4.

chemistry
does the ph change and how much difference is there (double, triple, same or half) for a solution of 0.1M NaHCO3 vs 0.2M NaHCO3 (volume constant)? Kb not known?

Chemistry
I am having trouble with how to approach this problem. I have the solution but can't figure out how to get it. How many moles of NaOH must be added to 1.0 L of 2.0M HC2H3O2 to produce a solution buffered at each pH? a) pH=pKa b)pH=4 c)ph=5

math
best number sentence to use to estimate the sum of 27 and 52

latin bases
Which Latin base means to see? a.CLUD b.PLEN c.VOC- d.VIS-

Latin prefix
Uhm, clearly my name says Larry. So what's the confusion here ?

Latin prefix
since the word segregate contains the Latin prefix se-,part of the meaning refers to: a.under b.behind c.forward d.aside

chemistry
solve Ka for HX => H^+ + X^- given 0.1M LiX at pH=8.9 Chemistry - DrBob222, Tuesday, March 30, 2010 at 6:32pm LiX(aq) ==> Li^+(aq) + X^-(aq) Question for DrBob222 - is the X^- value in the ICE calculations 0.1 from the initial LiX 0.1M? X^- is a base and hydrolyzes in w...

chemistry
solve Ka for HX => H^+ + X^- given 0.1M LiX at pH=8.9 Chemistry - DrBob222, Tuesday, March 30, 2010 at 6:32pm LiX(aq) ==> Li^+(aq) + X^-(aq) X^- is a base and hydrolyzes in water to X^- + HOH ==> HX + OH^- Make an ICE chart and substitute into the following: Kb = (Kw...

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