题目

写出化学方程式，一步实现下列转变。 (1)Al→NaAlO2                                                   (2)Al2O3→AlCl3                                                       (3)Fe(OH)2→Fe(OH)3                                                   (4)Na2O2→Na2CO3                                                    (5)Na2CO3→NaHCO3                         9．已知实数a，b，c满足a＞0，b＞0，c＞0，且abc=1．（Ⅰ）证明：（1+a）（1+b）（1+c）≥8；（Ⅱ）证明：$\sqrt{a}+\sqrt{b}+\sqrt{c}≤\frac{1}{a}+\frac{1}{b}+\frac{1}{c}$．