When a firework explodes is it a physical change or a chemical change /

The conventional equilibrium constant expression (kc) for the system below is: 2icl(s) ⇄ i2(s) + cl2(g) [cl2] ([i2] + [cl2])/2[icl] [i2][cl2]/[icl]2 none of the listed answers are correct [i2][cl2]/2[icl]

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

Define the kinetic molecular theory