Если моль 1.8 , то масса
CaO = 1.8 * 56 = 100.8 грамм
Fe2(SO4)3+3BaCl2=3BaSO4+2FeCl3
<span>H2SeO4 → H2(+1)S(+6)O4(-2)</span>
<span><span>H3AsO4 → H3(+1)As(+5)O4(-2)</span></span>
<span><span><span>HClO4 → H(+1)Cl(+7)O4(-2)</span></span></span>
<span><span><span><span>H3PO3 → H3(+1)P(+5)O3(-2)</span></span></span></span>
<span><span><span><span><span>H2Cr2O7 → H2(+1)Cr2(+6)O7(-2)</span></span></span></span></span>
<span><span><span><span><span><span>H2CrO4 → H2(+1)Cr(+6)O4(-2)</span></span></span></span></span></span>
2NH4+2O2=N2+4H2O
2N(+4)+8e=N2(0)/*1 ок-ль,вос-е
O2(0)-4e=2O(-2)/*2 вос-ль,ок-е