September 4, 2015

Posts by KKK

Total # Posts: 20

What is the pH of a solution with [H3O+] = 1 x 10-9 M? My answer is pH=9. is that correct
December 1, 2014

How many moles of magnesium are needed to react with 16 g of O2? 2 MgO (s) + O2 (g) → 2 MgO (s)
October 23, 2014

At the city museum, child admission is $5.40 and adult admission is $8.70 . On Thursday, three times as many adult tickets as child tickets were sold, for a total sales of $693.00 . How many child tickets were sold that day?
September 24, 2014

kkk- revenge
May 23, 2014

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 ...
September 16, 2012

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 ...
September 17, 2011

November 11, 2010

Ap physics
September 10, 2010

nnjn 5214 jmnj 2351
January 5, 2010

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...
January 5, 2010

December 25, 2009

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...
July 13, 2008

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...
July 5, 2008

length x width = area (b+8) x b = area (b^2)+(8b)= area hope this helps...:D
July 5, 2008

June 10, 2008

how will I be able to form the cis,trans and the cis,cis isomers of dibenzalacetone?
February 25, 2008

organic chemistry
why is the trans-trans isomer of dibenzalacetone the most stable isomer?
February 24, 2008

English (Macbeth)
November 18, 2006

Sounds good. Thanks for the insight
July 29, 2006

How far of the Taurus form Earth?
kill the black
August 21, 2005

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