Every pure substance has exact and specific density. What are two purposes that a chemist would use a calculated density for.

1. Density can be used to identify a substance

2. Density can be used to ascertain whether a substance will float in water.

Explanation:

The calculation of the density of a substance can be used to identify the substance. If the density of a substance is calculated accurately, and compared with a table of standard densities, then we can identify that substance.

Also, density determines whether an object will float or sink in water. If an object is less dense than water then it will float in water. If it is denser than water, then it will sink in water.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.