Answer the following question given this paragraph: 

[PCl 3][Cl 2] (0.135)(0.135) = = 0.021 0.87 [PCl 5] The equilibrium constant calculated from the equilibrium concentrations is equal to the value of Kc given in the problem (when rounded to the proper number of significant figures). Thus, the calculated equilibrium concentrations check. Kc =.


Q: Because of their reactivity, we do not find most representative metals as free elements where?

 Choices:

- in water

- in the atomospher

- underground

- in nature

A:
in nature
