I think the answer is: D) The reaction could spend more time in the reverse direction than in the forward direction.
Answer:
The bond angles between the axial bonding groups are slightly less than 180°.
The bond angles between the equatorial bonding groups are slightly less than 120°.
Explanation:
Accordign to VSEPR theory, a molecule with four bonding groups and one lone pair on the central atom has a trigonal bipyramidal electronic geometry.
The position of the lone pair can be located in the equatorial position or axial position.
When the lone pair is found in equatorial position, it has two axial groups that repel it and the angle of the lone pair between each axial group is 90°.
When the lone pair is in axial position it has 3 equatorial groups that repel it and the angle of the lone pair between each equatorial group is 90°.
Since the molecule has a lone pair, the most stable geometric structure is when the lone pair is in the equatorial position, because it has fewer repulsions than in the axial position.
The molecular geometry is "seesaw"
The bond angles between the axial bonding groups are slightly less than 180°.
The bond angles between the equatorial bonding groups are slightly less than 120°.
A physical change is a change when a substance phases changes only. A chemical change is a change where a substance upon applying conditions or adding another substance to it, changes into a wholly new product. Hence the answer to this problem is physical change.
There is no single chemical composition that characterizes all glass. Typical glass contains formers, flexes, and stabilizers. Formers make up the largest percentage of the mixture to be melted. And typical soda-lime-silica glass the former is silica (silicon dioxide) in the form of sand.