30 g of iron(III) oxide (Fe₂O₃), a fine reddish-brown powder composed of iron and oxygen. This compound occurs naturally as hematite and is widely used in industrial, laboratory, and artistic applications. It serves as a pigment in paints and ceramics, an abrasive in polishing compounds, and a reactant in thermite welding due to its strong oxidizing properties. Iron(III) oxide is also employed in magnetic materials, catalysis, and as a raw material in steel production.