1.在实验室进行实验,学生们被要求在固态混合物中确定的苯甲酸和木炭相对质量.苯甲酸能溶于热水,但木炭不溶.制订这一混合物分离的两种方法.
2.讨论液体和气体的相似性和差异性.
P.S：铁是混合物吗?
3.在宏观和微观两方面解释固体,液体和气体之间的差异
几道英文版的化学题1.In a laboratory experiment,students are asked to
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