Mass per unit volume of any substance is called density.
It can be represented as:
[tex]\text {Density} & = \dfrac{\text{Mass}}{\text{Volume}}[/tex]
It is measured in kg/m³.
Given,
[tex]\text {Volume} & = \dfrac{\text{Mass}}{\text{Density}}[/tex]
[tex]\text {Volume} & = \dfrac{\text{350 gm }}{\text{13.6 g/ml}}[/tex]
= 25.92 ml
Therefore, 26 ml of the volume of mercury is present.
To learn more about mass, volume and density refer to the link:
https://brainly.com/question/24386693