D(N2)=Mr(Cl2)/28=35.5*2/28=2.54
А)
8 x
S+O2=SO2
m=32 V=22,4л
8/32=x/22,4
x=5,6л
б)
10 x x
C7H16+11O2=7CO2+8H2O
m=400 V=158,6 m=144
VCO2=10/400=x/158,6
x=4л
mH2O=10/400=x/144
x=3,6г
в)
Fe2O3+3H2=2Fe+3H2O
x/67,2=140/112
xV=84л
x/6=140/112
x=7,5г
C6H5COOH+C3H7OH=C6H5COOC3H7+H2O
3Н2 + WO3 = W + 3H2O
3Al + Fe2O3 = 3AlO + 2Fe
(4 верно)
H₂SO₄<span> = H</span>⁺<span> + HSO</span>₄⁻
С(H₂SO₄) = C(H) = C(HSO₄) = 0,0388 моль/л
рН = –lg 0,0388 = 1,4
<span>Ответ: pH = 1,4</span>