Wednesday
July 23, 2014

Posts by KKK


Total # Posts: 14

chemistry
Your team performed replicate analyses of a sample and obtained an average 18.54 mM concentration with a relative standard deviation of 4.0%. If you later discover that a systematic error was made by a factor of 2 and the mean concentration should have been 9.27 mM, what is th...

PHYSICS
Two trains, each having a speed of'34 km,/h, are headed at each other on the same straight track. A bird that can fly 58 km /h flies ofi" the front of one train when they are 102 kmapart and heads directly for the other train. On reaching theother tr...

geomtry
idkkkkkkkkkkkkkkk

Physics
nnjn 5214 jmnj 2351

chemistry
why do you need to construct a calibration curve when doing spectrophotometric determinations? Is it not possible to obtain the concentration of the unknown solution by simply getting the extinction coefficient of the species under study and then determine its concentration in...

physics
no

chemistry
what is the significance of partial molar enthalpy of mixing? I tried to search the net but I did not get anything. I also tried to look at our textbook, which by the way, is by Peter Atkins but I find it insufficient. Please help me...

physical chemistry
how can i get the critical temperature of CO2 given a set of data which consists of surface tension and density at different temperatures. The table looks like this: T(oC) density surface tension 0 0.927 4.50 20 0.772 1.16 I really need some help about this...please...

Math
length x width = area (b+8) x b = area (b^2)+(8b)= area hope this helps...:D

ORGANIC CHEMISTRY
how will I be able to form the cis,trans and the cis,cis isomers of dibenzalacetone?

organic chemistry
why is the trans-trans isomer of dibenzalacetone the most stable isomer?

English (Macbeth)
POOOOOOOOOOOOOOOOOOOOOOOO

English
Sounds good. Thanks for the insight

How far of the Taurus form Earth?
kill the black

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