What is the difference between a compound and a mixture?

What is the difference between a compound and a mixture?
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Answer: A compound is a substance composed of two or more different elements chemically combined in a fixed proportion, while a mixture is a combination of two or more substances that are not chemically combined and can be separated by physical means. For example, water is a compound made up of hydrogen and oxygen atoms in a fixed proportion, while a mixture of salt and sand can be separated by physical means such as filtration.
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