m(K2SO4)=300×0,05=15г
m(ppa)=300+60=360г
w(K2SO4)=15:360=0,0416×100=4,16%
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m(K2SO4)=300×0,05=15г
m(ppa)=300+60=360г
w(K2SO4)=15:360=0,0416×100=4,16%