A rock is 5.0% by mass fayalite (Fe2SiO4), 7.0% by mass
Chapter 2, Problem 2.130(choose chapter or problem)
A rock is 5.0% by mass fayalite (Fe2SiO4), 7.0% by mass forsterite (Mg2SiO4), and the remainder silicon dioxide. What is the mass percent of each element in the rock?
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