Saturday
April 19, 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.

Chemistry
Why water is a weak electrolyte?

Chemistry
Give two bronsted acid-base that are not Arrhenius bases.

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

Chemistry
What is the weakness of the Bronsted-Lowry acids and bases theory?

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

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

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

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?

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

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