几道英文版的化学题1.In a laboratory experiment,students are asked to

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几道英文版的化学题
1.In a laboratory experiment,students are asked to determine the ralative amounts of benzoic acid and charcoal in a solid mixture.Benzoic acid is relatively soluble in hot water,but charcoal is not.Devise a method for separating the two components of this mixture.
2.Discuss the similarities and differences between a liquid and a gas.
P.S:铁是混合物吗?
3.Explain the differences among solids,liquids,and gases both macroscopically and microscopically.

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

_______ the experiment,the students were asked to watch sile The students are making an experiment in the science l_____. 1.To learn about the stages in a scientific experiment. How many students are asked in 3a?Who are they? To sncceed in a scientific experiment,______ To succeed in a scientific experiment, 翻译1.What are the students asked to go to class on time for? 几道英文填空题,急Many students in our school ride the bike to school When students and parents are asked to rate subjects accordi When students and parents are asked to grade subjects accord 英语翻译When students and parents are asked to gradesubjects acc We are often asked to make a speech in life.Most of us are a