Answer:
a
Explanation:
The correct statement about semi-empirical methods is
It combines a theoretically sound model of bonding with some experimentally determined parameters.
These methods are typically referred to by acronyms which encode some of the underlying theoretical assumptions.
Clean? I’m pretty sure not sure what it means but.
Charles Law is the law that states pressure and temperature are directly proportional at constant volume and miles
Any buffer exists in this equilibrium
HA <=>

In a buffer, there is a large reservoir of both the undissociated acid (HA) and its conjugate base (

)
When a strong acid is added, it reacts with the large reservoir of the conjugate base (

) forming a salt and water. Since this large reservoir of the conjugate base is used, the ph does not alter drastically, but instead resist the pH change.
The object has an overall positive charge.