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標題: [重要物] Sometimes it is desirable to determine the weight percent of one element [打印本頁]

作者: Smallcat 時間: 2022-10-12 21:25 標題: Sometimes it is desirable to determine the weight percent of one element

因為我花了四小時解出這題，為了造福後輩，決定寫下我的解法。
當然，可能和某些付費的解答網站是一樣的。

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Sometimes it is desirable to determine the weight percent of one element, C1, that will produce a specified concentration in terms of the number of atoms per cubic centimeter, N1, for an alloy composed of two types of atoms. This computation is possible using the following expression:

where NA is Avogadro's number, ρ1 and ρ2 are the densities of the two elements, and A is the atomic weight of element 1
Derive Equation 4.22 using a modified form of Equation 4.2 and expressions contained in Section 4.4.

首先，題目要我們用4.2的變形來開始，原本長這樣：