ONLY NEED HELP WITH PART B. Calculate the relative amount of each phase present

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ONLY NEED HELP WITH PART B. Calculate the relative amount of each phase present in terms of mass fraction?

***I do not understand what Wb and Walpha are in terms of these equations given:

Walpha=C0-CL/Calpha-CL

WL=Calpha-C0/Calpha-CL

MY QUESTION: for the Walpha eqn, is CL supposed to be our Calpha, and for WL eqn is Calpha supposed to be our CB?

Given the phase diagram in problem #1. what phases are present in a Pb-Sn alloy with 60 wt% Pb at 150 degree C? Calculate the relative amount of each present in terms of mass fraction (Wn, Wt, etc.).What is the composition of each phase?

Explanation / Answer

Please explain C.

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