The value of k equivalent for the reaction expressed in scientific notation is 1.2 × 10⁻³. Then the correct option is D.
The equation in which chemically react with each other is called chemical reaction and if this reaction is shown mathematically then it is called a chemical equation.
The given chemical equation will be
[tex]\rm H_2 + F_2 \xrightarrow[equil.]{at\ 600} 2HF[/tex]
[HF] = 5.82 x 10⁻² m
[H₂] = 8.4 x 10⁻³ m
[F₂] = 8.4 x 10⁻³ m
The value of k equivalent for the reaction expressed in scientific notation will be
[tex]\rm k_{eq} = \dfrac{8.4*10^{-3}*8.4*10^{-3}}{5.82*10^{-2}}\\\\k_{eq} = 1.2 *10 ^{-3}[/tex]
More about the chemical equation link is given below.
https://brainly.com/question/20492533