A100.0 ml graduated cylinder is half-filled with 8.0 g of diatomaceous earth, a material consisting mostly of silica and used as a filtering medium in swimming pools. how many millilitres of water are required to fill the cylinder to the 100.0 ml mark? the diatomaceous earth is insoluble in water and has a density of 2.2 g/cm3.

96.3636 mL

Explanation:

Given;

Volume of the graduated cylinder = 100.0 mL

Mass of the diatomaceous earth in the cylinder = 8.0 g

Density of diatomaceous earth = 2.2 g/cm³

Therefore,

the volume of diatomaceous earth in  the cylinder =

or

the volume of diatomaceous earth in  the cylinder =

or

the volume of diatomaceous earth in  the cylinder = 3.6363 cm³

also,

1 cm³ = 1 mL

Thus,

the volume of diatomaceous earth in  the cylinder = 3.6363 mL

Hence,

The Volume of water required to fill the cylinder upto 100 mL = 100 - 3.6363

= 96.3636 mL

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).