<span>K2Cr2O7+3Na2S+7H2SO4=Cr2(SO4)3+3S+K2SO4+3Na2SO4+7H2O</span>
<span>m(K2Cr2O7)=98*0,05=4,9 г</span>
<span>n(K2Cr2O7)=4,9/294=0,017 моль</span>
<span>n(S)=3n(K2Cr2O7)=0,017*3=0,05 моль</span>
<span>m(S)=0,05*32=1,6 г</span>
<span>Ответ: 1,6 г</span>