Question: A sample of ferric oxide (Fe 2 O 3 , density = 5.24 g/mL) obtained from ignition of a gravimetric precipitate weighed 0.296 1 g

A sample of ferric oxide (Fe₂O₃, density = 5.24 g/mL) obtained from ignition of a gravimetric precipitate weighed 0.296 1 g in the atmosphere. What is the true mass in vacuum?

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