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化学式中元素质量分数的计算及比较,化学式中原子个数的确定是初中学生学习化学的一大难点,笔者结合教学实际,给出几种巧解方法,希对学生有所启发.
Calculation and comparison of elemental mass fractions in chemical formula, the determination of the number of atoms in the chemical formula is a major difficulty for junior high school students to learn chemistry. The author gives some clever solutions based on the teaching practice, and hopes to inspire the students.