What is the mass fraction of sulfur (%) in pyrite (FeS2)?

univerkov | June 20, 2021 | education

Let us calculate the mass fraction of sulfur in pyrite FeS2, knowing the atomic masses of iron (56 amu) and sulfur (35.5 amu).
D (%) = (35.5 * 2) / (35.5 * 2 + 56) * 100% = 55.9%.

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