Why it is wrong to use the term 'Pure Air' in Science?

Explanation:

Air is a combination of other gases, dust particles, pollens, spores etc. This means that air is a heterogeneous mixture where particles are unevenly distributed.

Air is not considered as a pure substance because there is not one element present in air. A substance which contains only one type of element is called a pure substance.

Therefore, it is wrong to use the term 'Pure Air' in Science.

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

bcde is the incorrect answer it is a