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August 29, 2014

Posts by DEWA


Total # Posts: 10

Chemistry
At 40 c,the value of Kw is 2.92 10-14.calculate the [H+] and [OH-] of pure water at 40 c.
November 21, 2011

Chemistry
Why water is a weak electrolyte?
November 20, 2011

Chemistry
Give two bronsted acid-base that are not Arrhenius bases.
November 14, 2011

Chemistry
Which of the two is the stronger base?Give your reason. (a) HPO4 2- or PO4 3- (b)HS- or S2-
November 14, 2011

Chemistry
What is the weakness of the Bronsted-Lowry acids and bases theory?
November 14, 2011

Chemistry
1000 g of a 50% (mass percentage) nitric acid solution is to be diluted to 20%(mass percentage) nitric acid solution. How many liters of water should be added to the starting solution? Please show me the detail answer
October 29, 2011

Chemistry
1000 g of a 50% (mass percentage) nitric acid solution is to be diluted to 20%(mass percentage) nitric acid solution. How many liters of water should be added to the starting solution? Please show me the detail answer
October 29, 2011

Chemistry
5.85 g of sodium chloride(NaCl) is dissolved in 250 mL OF solution. Calculate mass percentage of the solute.
October 28, 2011

Chemistry
1000g of a 50%(mass percentage) nitric acid solution is to be dil ute to 20%(mass percentage) nitric acid solution.how many lit ers of water should be added to the starting solution?
October 27, 2011

PHYSICS
coil having 1000 turns and a length of 3.14cm carries a current of 5A. calculate the magnetomotive force and the magnetizing force
January 13, 2011

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