2018年中考化学真题分类汇编1物质的构成和变化考点6化学用语3化学式的组成和构成1填空题商标说明(无答案).doc

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1化学用语(18 泰安)26、(2 分)儿童缺锌会引起食欲不振、发育不良等症状。如下图为某补锌口服液说明书的部分信息,图中葡萄糖酸锌化学式已不完整,请根据相关信息回答下列问题:(1)葡萄糖酸锌的化学式量是 455,则葡萄糖酸锌化学式中氢原子右下角的数字为_;(2)若儿童 1kg 体重每日需要 0.5mg 锌,每天从食物中只能摄入所需锌的一半。体重为 20kg 的儿童,理论上一天还需服该口服液_支? (18 乐山)47(4 分)右图是“牌”钾肥的部分信息:根据该信息计算:(l)硫酸钾中各元素的质量比;(2)该钾肥中钾元素的质量分数最高为多少?2(18 山西)24、在山西省人民医院消化科的宣传栏里,有这样一则宣传:(1)观察图 1,集体就餐时,为避免疾病传播应该注意的是_(写一条)。(2)胶囊中尿素的相对分子质量是_。农业生产所使用的化肥中,尿素可用作_肥。

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