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1.分子大小例1 现在已经有能放大数亿倍的非光学显微镜(如电子显微镜等),使得人们观察物质内的分子排列成为可能.图1是用放大倍数为3×107倍的电子显微镜拍摄的二硫化铁晶体的照片,照片下方是用最小刻度为毫米的刻度尺测量照片的情况.请估测出二硫化铁分子体积的数量级. 分析照片上每个二硫化铁分子间的距离约为d=1cm,照片被放大了3×107倍,所以每个二
1. Molecular size Example 1 Now that there are non-optical microscopes (such as electron microscopes) that can magnify hundreds of millions of times, it becomes possible to observe the molecular arrangement within the material. Figure 1 is an electron microscope with a magnification of 3 x 107 times. Photographs of iron disulfide crystals were taken. Photographs were taken at the bottom of the photo using a scale with a minimum scale of millimeters. Please estimate the order of magnitude of the molecular volume of iron disulfide. Analyze the distance between each iron disulfide molecule on the photograph. For d=1cm, the photo is magnified 3x107 times so every two