[trikkistyle]

ive got a bit of a problem concerning chemical equations.

the question is:

A stock standard of Ammonium sulphate - (NH4)2SO4 was prepared with   0.471 g (MWt = 132.14) in 100 ml is provided. This stock solution was diluted 100 x before use.
Estimate the ammonium concentration (NH4+) in the control and liver cancer samples
control=156.904 microlitres of ammonium sulphate
liver=654.047 microlitres of ammonium sulphate

please can you help.any help wil be much appreciated.

many thanks
seb