2NaOH+H2S=Na2S+2H2O
m1(NaOH)=300*20/100=60
m2(NaOH)=2*23+2*16+1=80
m1(H2S)=(1*2+32)*40/22.4=60.714
m2(H2S)=1*2+32=34
m1(NaOH)/m2(NaOH)<m1(H2S)/m2(H2S)
m2(Na2S)=23*2+32=78
m1(Na2S)=60*78/80=58.5
m1(NaOH)=300*20/100=60
m2(NaOH)=2*23+2*16+1=80
m1(H2S)=(1*2+32)*40/22.4=60.714
m2(H2S)=1*2+32=34
m1(NaOH)/m2(NaOH)<m1(H2S)/m2(H2S)
m2(Na2S)=23*2+32=78
m1(Na2S)=60*78/80=58.5