NaOH+CO2( изб)-->NaHCO3 - кислая соль
М (О2)=32г/моль
8г/32=0,25моль
22,4*0,25=5.6л
2. <span>8г-------------------------------------------------Хл </span>
<span>Mg + 2CH3COOH = (CH3COO)2Mg + H2 </span>
<span>24г----------------------------------------------22,4л </span>
<span>Х=8*22,424=7,47(л) </span>
<span>Ответ-7,47л</span>