Calculate the ph of a buffer solution containing 0.2M NH4OH and 0.25M NH4Cl kb=1.8×10
February 18, 2015
A body of mass m is suspended by two strings (right strings equals an angle a with horizontal and left an angle B with vertical. Dra the figure.
April 21, 2014
you can get it on google
November 19, 2009
maths ( mental ability)
P can do a piece of work in 9 days. Q is 50% more efficient than P. The number of days it takes Q to do the same piece of work is?
November 2, 2009
a man loses 12.5% of his money & after spending 70% of the remainder , he was left with Rs 210/- . the money he had at the beginning is?
October 21, 2009
what is light year & 1 light year=to?
October 16, 2009
n+3=12 transposing (-3)to r.h.s n=12-3 n=9
May 27, 2009