Sometimes it is desirable to be able to determine the weight percent of one element, C 1

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Sometimes it is desirable to be able 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:


100 C = (4.19) NP2 P2 1+ N,4

Where

NA = Avogadro’s number

ρ1 and ρ2 = densities of the two elements

A1 and A2 = the atomic weights of the two elements

Derive Equation 4.19 using Equation 4.2 and expressions contained in Section 4.4.

Sometimes it is desirable to be able to determine the

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