用数字和化学符号表示:2个水分子 ___  _____; 3个氯离子____________

用数字和化学符号表示:
2个水分子 ___  _____; 3个氯离子____________;五氧化二磷____________
4个氧原子            ;+2价的锌元素        ;碳酸根离子___________

答案

2H2O   3Cl    P2O5    4O    Zn2+   CO32解析:

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