Question

select the true statements about density. density can be used to help identify a substance. the density of a substance does not depend on the size of the sample. to calculate density, divide the volume of a substance by its mass. density is an extensive property.

Explanation:

1. Density is a characteristic property of a substance. Different substances have different densities, so it can be used for identification.
2. Density is an intensive property, meaning it does not depend on the amount or size of the sample.
3. The formula for density is $

ho=\frac{m}{V}$, where $m$ is mass and $V$ is volume, so we divide mass by volume, not the other - way around. Extensive properties depend on the amount of matter, while density does not, so it is not an extensive property.

Answer:

• Density can be used to help identify a substance.
• The density of a substance does not depend on the size of the sample.