Mg+2HCl=MgCl2+H2↑
n(Mg)=(150*(100\%-7\%/100\%))/24=5.8125 моль
n(Mg)=n(MgCl2)=5.8125 моль
m(MgCl2)=5.8125*95=552.1875 г
A) Fe2O3+6HCl=2FeCl3+3H2O
б) не знаю
в) 3Fe3O4+8Al=4Al2O3+9Fe
г) 4Fe(OH)2+O2+2H2O=4Fe(OH)3
<span>BaO + H</span>₂<span>O
= Ba(OH)</span>₂
<span>Ba(OH)</span>₂<span> + K</span>₂<span>S = BaS</span>↓ + 2KOH
<span>BaS + 2HNO</span>₃<span>= Ba(NO</span>₃<span>)</span>₂<span> + H</span>₂<span>S</span>↑
0,5
моль х г
BaO -------> <span>Ba(NO</span>₃<span>)</span>₂
1 моль 261
г
х = 0,5 моль ·
261 г = 130,5 г
196 г хг
H2SO4+2NaCl=Na2SO4+2HCl
98 142
х=142*98/196=71 г