Which compound has the the highest melting point? al2(co3)3c12h22o11c8h16h20

Al₂(CO₃)₃ would have the highest melting point.

If it existed, it would consist of Al³⁺ and CO₃²⁻ ions, and the strong attraction between them would give the ionic compound a high melting point.

C₁₂H₂₂O₁₁ and C₈H₁₆ are organic compounds (molecular). Molecular compounds typically have low melting points.

Water, of course, freezes at 0 °C.

pure substance: iron,copper

impure substance: water,charcoal

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.