Fe2O3 + 6HNO3(разб. ) = 2Fe(NO3)3+ H2O обмен
<span>Fe(NO3)3+H2O=Fe(OH)3 + HNO3 обмен</span>
<span /><span>Fe(OH<span>)3=Fe2O3+H2O разложение</span></span>
<span><span>Fe2O3=Fe +O2 разложение</span></span>
<span><span>Fe+ Cl2= FeCl2 соединение</span></span>
<span><span>FeCl2+ HNo3=Fe(No3)3+H2O обмен</span></span>
<span><span /></span>
<span>N2+3H2=2NH3 </span>
<span>4NH3+5O2=4NO+6H2O </span>
<span>2NO+O2=2NO2</span>
C4H9COOH+C3H7OH=C4H9COOC3H7+H2O
С2h4+h2o->c2h5oh
C2h5oh+o2->ch3coh
Ch3coh+Ag2o->ch3cooh+2Ag
Ch3cooh+c2h5oh->ch3cooc2h5+h2o
Ответ:%(28,50,12.5,40)
Объяснение:и так, M(k2s)=40*2+32=80+32=112, 32/112=28%, 80/112=71%
в 1 массовая доля равна 28%, далее M(SO2)=32+16*2=64. 32/64=50%,
M(K2SO3)=40*2+32+16*3=112+48=160, 32/160=0,2*100=20%; M(S8)=12.5% ;
SO3=32+48=80=32/80=40%