При нормальных условиях кислород объёмом 0,224 литра содержит количество вещества, равное 0,224:22,4 = 0,01 моль.
Ответ: 0,01 моль.
<span>(NH</span>4<span>)</span>2<span>SO</span>4<span> + 2KOH -> K</span>2<span>SO</span>4<span> + 2NH</span>3<span> + 2H</span>2<span>O</span>
<span>2NH</span>4+<span> + SO</span>42-<span> + 2K</span>+<span> + 2OH</span>-<span> -> 2K</span>+<span> + SO</span>42-<span> + 2NH</span>3<span> + 2H</span>2<span>O</span>
<span>2NH</span>4+<span> + 2OH</span>-<span> -> 2NH</span>3<span> + 2H</span>2<span>O</span>
<span>NH</span>4+<span> + OH</span>-<span> -> NH</span>3<span> + H</span>2<span>O</span>
H2 + Cl2 = 2HCl
<span>2NaCl + H2SO4 = Na2SO4 + 2HCl</span>
2Al+3H2SO4=Al2(SO4)3+3H2
m(Al)=18*0.25=4.5г
n(Al)=4.5/27=0.16моль
n(H2)=0.16*3/2=0.24моль
V(H2)=0.24×22.4=5.376л