‍10月2日，辽宁营口

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一位83岁的老人

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随手在纸上快速写出

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苯甲酸钠的化学结构式在网上走红

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外孙马先生称

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自己吃饭时说

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不少酱油里都含有苯甲酸钠

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姥姥立刻拿出纸笔

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写出苯甲酸钠结构式

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自己感到特别惊讶

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这么大年龄还能记住

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马先生称

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姥姥毕业于辽宁师范

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网友纷纷表示

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这位姥姥可太厉害了

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也有人感叹

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早把当初学的还回去了

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也有网友晒出

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自己家里的老学霸

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（辽沈晚报综合）

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石君心2647为何硼酸是一元酸?它的结构式怎么写? -
毋叛曹18220663223 ______ 硼酸电离:H3BO3+H2O=H2O→B(OH)3≈(可逆)≈B(OH)4+H+.硼酸是因为在水中与水中羟基结合生成四羟基合硼酸根和一个氢离子,所以被定义为一元酸

石君心2647β—奈乙酸和顺丁烯二酸的结构式咋写? -
毋叛曹18220663223 ______ β—萘乙酸和顺丁烯二酸的结构和结构式见图:

石君心2647乙烯的结构式?和乙酸的最简式?怎么写啊 -
毋叛曹18220663223 ______[答案] 乙烯就是一种不饱和烃,它的分子里含有碳碳双键, 乙烯的分子式是C2H4,结构式是,它的结构简式是CH2=CH2.

石君心2647酸用化学符号如何表示? -
毋叛曹18220663223 ______ HA 这个是通用的酸的表达符号 H代表氢离子 A是acid也就是酸的缩写

石君心2647...Cu和Ag的催化条件下被氧气氧化的化学方程式.2.写出该酸在一定条件下,每两个分子发生分子间脱水生成环状酯的所有可能的结构式、 -
毋叛曹18220663223 ______[答案] CH4 ------- CH4+Cl2→CH3Cl+HCL -------点燃 CH4+2O2→→CO2+2H2O(完全燃烧) -------点燃 CH4+O2→→CO+2H2O(不完全燃烧) ----1000℃ CH4→→→C+2H2 C2H6的性质与CH4相似, C2H4 -------点燃 C2H4+3O2→→2CO2+2H2O(完全燃...

石君心2647为什么草酸、碳酸的分子式是先写氢?H2C2O4 H2CO3 -
毋叛曹18220663223 ______[答案] 碳酸是无机酸,氢先写.草酸是有机酸,可以写结构式:HOOC-COOH,对有机物来讲写分子式一般都写明结构,比如乙酸CH3COOH,丙酸C2H5COOH,草酸没同分异构体,并且表明他是二元酸故氢写在前,还比如H4EDTA(乙二胺四乙酸),H2...

石君心2647我能写出常见高级脂肪酸的结构简式:软脂酸、硬脂酸、油酸() - 上学吧
毋叛曹18220663223 ______ 硫酸 H2SO4; 盐酸:HCl; 硝酸:HNO3. 谢谢采纳!

石君心2647什么酸什么的化学式咋写?酸一般写在末尾吗?例举硅酸钠,过程 O(∩ - ∩)O谢谢 -
毋叛曹18220663223 ______ 酸根在后,金属在前Na2SiO3

石君心2647如何写酸的化学式 -
毋叛曹18220663223 ______ 关键你背了化学式之外,你还要背它对应的化学价.例如硝酸根是负一价的,那么,它只能和正一价的离子结合,而H和Ag的离子恰好是正一价的,所以你就可以知道了,一个硝酸根正好可以和一个H或者Ag离子结合.而如果是Mg离子,那么他的离子是正二价的,所以对应的如果和硝酸根结合,那就需要两个-1价的才能达到电荷守恒. 所以关键就是各种离子的化学价以及电荷守恒定律