question 1\nwhat is the density of a substance?\nthe ratio of the substances mass to the volume it…

question 1\nwhat is the density of a substance?\nthe ratio of the substances mass to the volume it occupies.\nthe mass of the substance in a vacuum.\nthe ratio of the number of moles of the substance to its mass.\nthe volume that a substance displaces.
Answer
Brief Explanations:
Density is defined as the mass - per - unit volume of a substance. Mathematically, density $\rho=\frac{m}{V}$, where $m$ is the mass and $V$ is the volume.
Answer:
The ratio of the substance's mass to the volume it occupies.