守恒思想是重要的化学思想,利用守恒法解答化学问题是中学化学中重要的解题方法。守恒思想的核心是元素守恒,利用元素守恒有助于从本质上理解物质在转化过程中一些物理量发生变化的根本原因,从而能够抓住问题的本质,达到快速解题、事半功倍的效果。例1同温同压下,amL NO、bmL N Conservative thinking is an important chemical idea. Using conservation law to solve chemical problems is an important problem solving method in middle school chemistry. The core of conservation is the conservation of elements, and the use of element conservation helps to understand the fundamental causes of the changes in the physical quantities of matter in the process of transformation, so that we can grasp the nature of the problem and achieve the effect of solving problems quickly and doing half the effort. Example 1 Same pressure as temperature, amL NO, bmL N