Question

question 4 (multiple choice worth 4 points) (01.06br mc) which of the following correctly describes a mixture? the particles are chemically bonded together, and they retain their individual physical and chemical properties. the particles are not chemically bonded, and they can only combine in certain set ratios. the particles do not retain their individual chemical properties, and they can only be separated by chemical means. the particles have no set ratio for how to combine, and they can be separated by physical means.

Explanation:

To determine the correct description of a mixture, recall the properties of mixtures:

• Mixtures are made of substances (particles) that are not chemically bonded.
• The components of a mixture can combine in any ratio (no set ratio) and can be separated by physical means (like filtration, distillation).
• Components retain their individual chemical and physical properties.

Now analyze each option:

1. "The particles are chemically bonded together, and they retain their individual physical and chemical properties." → Incorrect. Mixtures have no chemical bonding between components.
2. "The particles are not chemically bonded, and they can only combine in certain set ratios." → Incorrect. Mixtures have no set ratio for combination (compounds have set ratios).
3. "The particles do not retain their individual chemical properties, and they can only be separated by chemical means." → Incorrect. Mixture components retain their properties and are separated by physical means.
4. "The particles have no set ratio for how to combine, and they can be separated by physical means." → Correct. This matches the properties of a mixture (no chemical bonding, variable composition, physical separation).

Answer:

The particles have no set ratio for how to combine, and they can be separated by physical means.