сh3-ch(nh2)-cooh + naoh = ch3-ch(nh2)-coona + h2o

массовая доля=m(в-ва)/m(р-ра)*100%

m(в-ва)=200*0,1=20г

n=m/M

n(сh3-ch(nh2)-cooh)=20/89=0,23моль

n(сh3-ch(nh2)-cooh)=n(ch3-ch(nh2)-coona)

m=n*M

m(ch3-ch(nh2)-coona)=0,23*101=23,23