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磷酸的相对分子质量是多少

2025-03-15 11:50:06

推荐回答（1个）

回答1：

硫酸根的相对分子质量为96，既然R的为70，那么该硫酸盐相对分子质量428中个位的8必然只与硫酸根数量有关，说明该分子中有3个硫酸根（3*6=18，出现8），再计算可得R数为2，说明R是正三价的。那么一个R对应一个磷酸根，R的磷酸盐的相对分子质量为70+95=165。选a

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