which is a pure substance?\n○ soda\n○ gasoline\n○ salt water\n○ carbon dioxide
which is a pure substance?\n○ soda\n○ gasoline\n○ salt water\n○ carbon dioxide
Answer
Brief Explanations:
A pure substance has a fixed - composition and distinct properties. Soda is a mixture of water, carbon dioxide, and various flavorings and sweeteners. Gasoline is a mixture of hydrocarbons. Salt water is a mixture of salt (sodium chloride) and water. Carbon dioxide ($CO_2$) is a compound with a definite chemical formula and fixed composition, making it a pure substance.
Answer:
carbon dioxide