State, for each of the following physical quantities, if it is a scalar or a vector. Volume, mass speed acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity.

Explanation

To determine whether each of the given physical quantities is a scalar or a vector, we will analyze them one by one based on their definitions.

### Step-by-Step Solution:

1. **Volume**:
- Definition: Volume is the amount of space occupied by an object.
- Analysis: It has only magnitude (e.g., 5 liters) and does not have a direction.
- Conclusion: **Scalar**
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