Question: 2 . ( 1 0 pts ) A hypothetical A - B alloy of composition 5 5 wt % B - 4 5 wt %

2.(10 pts) A hypothetical A-B alloy of composition 55 wt%B-45 wt% A at some temperature is found to consist of mass fractions of 0.5 for both a and B phases. If the composition of the B phase is 90 wt% B -10 wt% A, what is the composition of the a phase?

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