Iron (Fe) Oxygen (O2) Iron(III) Oxide (Fe2O3)
Melting Point (°C) 1538 −218.4 1565
Density (g/cm3) 7.83 0.00143 5.26
Appearance shiny, gray
metal colorless,
odorless gas red, odorless
powder
What can be concluded from this data?
A.
A chemical reaction did not occur because solid iron cannot chemically react with oxygen gas.
B.
A chemical reaction occurred because iron(III) oxide has different properties than iron and diatomic oxygen.
C.
A chemical reaction occurred because iron(III) oxide has similar properties to iron and diatomic oxygen.
D.
A chemical reaction did not occur because iron(III) oxide is not a new substance.
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1 answer
The correct conclusion based on the provided data is:
B. A chemical reaction occurred because iron(III) oxide has different properties than iron and diatomic oxygen.
This choice is accurate because the properties (such as melting point, density, and appearance) of iron(III) oxide (Fe2O3) are distinctly different from those of the reactants iron (Fe) and diatomic oxygen (O2), indicating that a new substance was formed as a result of the reaction.
