Which part of an atom is mostly empty space

The part of an atom that is mostly empty space is the Cloud/Mist/Fog.

Explanation:

Most of an atom is a cloud of electrons surrounding a space called the nucleus with tiny protons and neutrons.

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

24

the right answer is c i just did the question.