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A rock is 4.2% by mass fayalite (Fe2SiO4), 8.4% by mass forsterite (Mg2SiO4), and the remainder...

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Chemistry

A rock is 4.2% by mass fayalite (Fe2SiO4), 8.4% by massforsterite (Mg2SiO4), and the remainder silicon dioxide. What isthe mass percent of each element in the rock?

_% Fe

_% Mg
_% Si

_% O

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