heterogeneous

Is Hydrogen A Homogeneous Or Heterogeneous Mixture? sand and salt: heterogeneous; salt water: homogeneous; pure water: compound; tossed salad: heterogeneous; hydrogen: element; unfiltered air: homogeneous; an apple: heterogeneous; granite: heterogeneous; iron: element; iron with rust: heterogeneous; nitric acid: compound; wood: heterogeneous. Is hydrogen chloride a homogeneous mixture? HCl gas is a chemical compound and aqueous