Please I need help.
Write the expression for the equilibrium constant Keq for the reaction below:

2KClO3(s) ⇔ 2KCl(s) + 3O2(g)

a.[KClO3] / [KCl] [O2]

b. [KClO3]2 / [KCl]2 [O2]3

c. [KCl] [O2] / [KClO3]

d. [KCl]2 [O2]3 / [KClO3]2

Answer choise.

d

c

a

b

Ineed with a, b, c, d, and e on the long answer

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !