Question 1199891
Concentrations if assumed as weight per volume


Removing some quantity v from the solution,

{{{(160*0.12)/(160-v)=0.20}}}

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{{{0.2(160-v)=160*0.12}}}

{{{(0.2)(160)-0.2v=160*(0.12)}}}

{{{-0.2v=160*0.12-0.2*160}}}

{{{v=(0.2*160-0.12*160)/0.2}}}--------compute this.