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例某校研究性学习小组为了测定当地石灰石矿中碳酸钙的质量分数,取来一些矿石样品,并取稀盐酸200g,平均分成4份,进行实验,结果如下:
In order to determine the mass fraction of calcium carbonate in the local limestone mine, a school research learning team took some ore samples and took 200 g of dilute hydrochloric acid and divided it into 4 equal parts. The experiment was conducted. The results are as follows: