Charles's law describes the relationship of the volume and temperature of
gas at a constant mass and pressure. according to this law, what would
happen to the volume of the gas if its temperature decreased from 400 k to
300 k?
o
a. the volume would be 4/3 of its original value.
b. the volume would decrease from 400 ml to 300 ml.
o
c. the volume would increase by 100 ml.
o
d. the volume would be 3/4 of its original value.

The allotropes of carbon include a variety of structures that include three-dimensional tetrahedral lattices, planes of hexagonal rings, cylindrical tubes of hexagonal rings, and spheres of five- and six-membered rings. similar shapes of network covalent atomic solids are possible with carbon nitride, boron, and pure silicon (e.g., silicene is a graphene-like allotrope of pure silicon). in contrast, silicates exist as either highly ordered or amorphous (more random) three-dimensional lattices. what could explain why there are there no naturally occurring sheets, stacked sheets, cylindrical tubes, or spheres of network covalent atomic solids composed of silicon and oxygen (sio2)? would pure silicate structures make good lubricants or good electrical conductors?