1. When tantalum interacts in the temperature range of 1000…1800 K, one thermodynamically stable phase Ta2O5 is formed on the metal surface. Determine whether the oxide film Ta2O5 has protective properties? The densities of the oxide Ta2O5 and Ta are 8.73 and 16.65 g/cm3, respectively, the relative atomic mass of tantalum is 180.95 g.

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