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> 下列叙述正确的是（　　） A．818O与819O是不同的核素，因此分别由这两种原子组成的分子其化学性质不同 B．常温下，pH=1的水溶液中Na+、ClO-、HCO3-、Fe2+可以大量共存 C．明矾和漂白粉常用于自来水净化和杀菌消毒，两者的作用原理相同 D．C（石墨，s）=C（金刚石，s）△H＞0，所以石墨比金刚石稳定

问题：

发布时间：2024-09-12

下列叙述正确的是（　　）

A．₈¹⁸O与₈¹⁹O是不同的核素，因此分别由这两种原子组成的分子其化学性质不同

B．常温下，pH=1的水溶液中Na⁺、ClO^-、HCO₃^-、Fe²⁺可以大量共存

C．明矾和漂白粉常用于自来水净化和杀菌消毒，两者的作用原理相同

D．C（石墨，s）=C（金刚石，s）△H＞0，所以石墨比金刚石稳定

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