С4H9-OH= H2O + C4H8 (Бутен)
1.<span>Al+Fe2O3--->Al2O3+FE</span>
<span>2.<span>Mg+HCl ----> MGCL+ H2</span></span>
<span><span>3.<span>NaOH2+CO2 ------> NaHCO2</span></span></span>
<span><span><span>4.<span>Ca+H2O ------> Ca(OH)2</span></span></span></span>
СН3
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H3C-C-CН2-СН2-СН3
ОН