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Zirconium oxidizes to ZrO2. The density of Zr is 6.5mg/m3 and that of ZrO2 is 5.9 mg/m3 . The atomic mass of Zr and O

Zirconium oxidizes to ZrO2. The density of Zr is 6.5mg/m3 and that of ZrO2 is 5.9 mg/m3 . The atomic mass of Zr and O is 91.22 U and 16 U respectively. Calculate the Piling-Bedworth ratio (P-B ratio) and determine if the oxidation is protective or non-protective.

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