Question: Sometimes it is desirable to be able to determine the weight percent of one element, C 1 that will produce a specified concentration in terms

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

N_A = 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

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

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