xFeS₂ + yO₂ -> zFe₂O₃ + wSO₂, what is the value of x + y + z – McqOptions

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1.	xFeS₂ + yO₂ -> zFe₂O₃ + wSO₂, what is the value of x + y + z + w?
A.	16
B.	21
C.	25
D.	32
Answer» D. 32

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