Consider the reaction. 2HF(g)—H2(g)+F2(g). What is the value of Keq for the reaction expressed in scientific notation

A). 2.1 ×

Explanation:

Given reaction,

2 (g) ⇄ (g) + (g)

The concentrations are as following;

= 5.82 × M

= 8.4 × M

= 8.4 × M

So,

= [( ) × ()] ÷ []^2

Now,

We can determine the value of by substituting the values in above formula:

= [ (8.4 × M) × (8.4 × M)] ÷ [(5.82 × )^2

= 2.08 *

=  2.1 ×

∵ = 2.1 ×

Thus, option A is the correct answer.