which description best fits a gas?

Options

A. definite shape and volume strong intermolecular attractions
B. definite volume shape of container moderateintermolecular attractions
C. definite volume shape of container weak intermolecular attractions
D. no defimite volume and takes the shape of container no intermolecular attraction

Answer

To determine which description best fits a gas, we need to analyze the properties of gases compared to solids and liquids.

### Step-by-Step Solution:

1. **Understanding the Properties of Gases**:
- Gases do not have a definite shape or volume. Instead, they take the shape and volume of their container. This is due to the high kinetic energy of gas molecules, which allows them to move freely and spread out.

2. **Intermolecular Forces in Gases**:
- The intermolecular forces in gases are very weak compared to solids and liquids. This weak attraction allows gas molecules to move independently of one another.

3. **Evaluating the Options**:
- **Option A**: Definite shape and volume, strong intermolecular attraction – This describes solids, not gases.
- **Option B**: Definite volume, shape of container, moderate intermolecular attraction – This describes liquids, not gases.
- **Option C**: Definite volume, shape of container, weak intermolecular attraction – This is incorrect for gases as they do not have a definite volume.
- **Option D**: No definite volume, takes the shape of the container, no intermolecular attraction – This accurately describes the behavior of gases.

4. **Conclusion**:
- Based on the properties of gases, the best description is **Option D**: "no definite volume, takes the shape of container, no intermolecular attraction."

### Final Answer:
The description that best fits a gas is: **D) No definite volume, takes the shape of the container, no intermolecular attraction.**