a mixture can be defined as a substance that can be separated into its parts by physical means such as a…

a mixture can be defined as a substance that can be separated into its parts by physical means such as a filter. which observation would indicate the substance being studied is a mixture? a. it separates into two layers after 24 hours. b. it breaks into four pieces when hit with a hammer. c. it turns black and gives off smoke when it burns. d. three different - sized crystals can be seen using a hand lens. e. when it is cut in half, both parts look the same.

a mixture can be defined as a substance that can be separated into its parts by physical means such as a filter. which observation would indicate the substance being studied is a mixture? a. it separates into two layers after 24 hours. b. it breaks into four pieces when hit with a hammer. c. it turns black and gives off smoke when it burns. d. three different - sized crystals can be seen using a hand lens. e. when it is cut in half, both parts look the same.

Answer

Brief Explanations:

A mixture can be separated by physical means. Separating into two layers after 24 hours is a physical separation due to differences in density or solubility of its components, indicating it's a mixture. Breaking into pieces with a hammer is a physical change of shape, not separation of components. Burning is a chemical change. Seeing different - sized crystals doesn't necessarily mean it can be separated by physical means to prove it's a mixture. Having two identical - looking halves when cut doesn't indicate it's a mixture.

Answer:

A. It separates into two layers after 24 hours.