57 Which of the following describes a chemical property of oxygen? A Oxygen liquefies under pressure. B An oxygen molecule may consist of two or three atoms. C The density of oxygen is 0.00133 g/cm3. D Oxygen reacts with iron to form rust. 58 Liquid sodium can be produced from a concentrated solution of sodium chloride, NaCl. First the NaCl solution is evaporated until only solid NaCl deposits remain. The solids are crushed, melted, and placed in an electrolytic cell called a Downs cell. Inside the cell, sodium ions are reduced to liquid sodium at the cathode. Then the liquid sodium is removed. In which part of the production of sodium described above does a chemical change take place? A evaporation of the sodium chloride solution B crushing of the solid NaCl deposits C melting of the crushed NaCl deposits D reduction of sodium ions to liquid sodium

Question

57 Which of the following describes a chemical property of oxygen? A Oxygen liquefies under pressure. B An oxygen molecule may consist of two or three atoms. C The density of oxygen is 0.00133 g/cm3. D Oxygen reacts with iron to form rust. 58 Liquid sodium can be produced from a concentrated solution of sodium chloride, NaCl. First the NaCl solution is evaporated until only solid NaCl deposits remain. The solids are crushed, melted, and placed in an electrolytic cell called a Downs cell. Inside the cell, sodium ions are reduced to liquid sodium at the cathode. Then the liquid sodium is removed. In which part of the production of sodium described above does a chemical change take place? A evaporation of the sodium chloride solution B crushing of the solid NaCl deposits C melting of the crushed NaCl deposits D reduction of sodium ions to liquid sodium 
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GPT-4o mini · Answer

57. The correct answer is **D**. Oxygen reacts with iron to form rust. This describes a chemical property because it involves the chemical reaction of oxygen with another substance (iron) to produce a new compound (rust). 58. The correct answer is **D**. Reduction of sodium ions to liquid sodium involves a chemical change. It transforms sodium ions (Na⁺) into liquid sodium (Na), which is a different substance than the ions present in the solution. The other options involve physical changes (evaporation, crushing, melting) where the chemical identities of the substances do not change.