Thursday
December 12, 2013

# Posts by K

Total # Posts: 705

Chemistry
I'm having a little trouble determining oxidation numbers for elements in a redox reaction KMnO4+HCl--> MnCl2+Cl2+H2O+KCl So far what I have for the reactants side is: K= +1 Mn= +7 O4= -2 H= +1 Cl= -1 And for the products side I have: Mn= +2 Cl2= -1 Cl2(diatomic)= 0 H2=...

physics
The figure below shows two current carrying wires and the directions of the currents they carry. The wires carry the following currents: I1 = 12.5 A and I2 = 9.8 A. Wire 1 is at (0, 4.0) mm; wire 2 is at (13.3, 0) mm; point P is at (13.3, 4.0) mm. webassign. net/userimages/two...

chemistry
If 8.72 grams of oxalic acid, H2C2O4, a diprotic acid, is neutralized when 23.4 mL of a solution of KOH is added, what is the molarity of KOH? the topic is acid-base triation, and i have already converted the mass to moles,but I am having trouble finding the volume for the aci...

chemistry
ha :) thanks so much, that helps lots, i don't know why i was over thinking it! you're awesome!

chemistry
how do i predict a conjugate a base? Ex: HBr. The conjugate base is Br- a. NH4+ b. H2O c. H2PO4

Chemistry
use the formula (V1*P1)/T1 = (V2*P2)/T2 and make sure all the units are converted correctly, so i believe you just convert 325ml to .325 L, and then convert -125oC to Kelvin, and once you plug in all yours #s solve, and then convert it back to oC since you will have your answe...

English

statistics
ER promises you will be seen in 10 minutes. the standard deviation is 2 minutes. chance someone will wait more than 13 minutes. i dont know what to do without a population size or sample size

Stastics
average for all football teams was an 86 with variance of 16. the buckeyes program over the last 16 year was a 93. is there sufficient proof at the .05 level of significance to say buckeyes were higher than everyone else.

Geometry
What is the surface area and lateral area of a regular triangular pyramid if the slant is 7 and the altitude is 5?

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