Final answer:
Density is the quantity of a substance in a mixture per unit volume of the mixture.
The answer is option ⇒B
Step-by-step explanation:
1. Density: Density is defined as the quantity of a substance in a mixture per unit volume of the mixture. It represents how tightly packed the particles of a substance are within a given volume.
2. Mass: Mass refers to the amount of matter in an object or substance. It is a measure of the total quantity of particles present.
3. Weight: Weight, on the other hand, is the force exerted on an object due to gravity. It is dependent on both the mass of the object and the gravitational pull acting on it.
4. Pressure: Pressure is defined as the force per unit area. It is typically used to describe the amount of force applied to a given surface area.
In the given question, the quantity of a substance in a mixture per unit volume of the mixture is being referred to. This corresponds to the concept of density, as it measures how much substance is present within a specific volume.
The answer is option ⇒B