Gaseous hydrogen iodide is placed in a closed container at 425 degrees C, where it partially decomposes to hydrogen and iodine: 2HI(g)--->/<---H2(g)+I2(g). At equilibrium it is found that [HI]= 3.59

0.0184

Explanation:

There is some info missing. I think this is the original question.

Gaseous hydrogen iodide is placed in a closed container at 425 °C, where it partially decomposes to hydrogen and iodine: 2 HI(g) ⇄ H₂(g) + I₂(g). At equilibrium, it is found that HI = 3.59 × 10⁻³ M, H₂= 4.87 × 10⁻⁴ M, and I₂= 4.87 × 10⁻⁴ M.

What is the value of Kc at this temperature?

Express the equilibrium constant to three significant digits.

Let's consider the following reaction at equilibrium.

2 HI(g) ⇄ H₂(g) + I₂(g)

The concentration equilibrium constant (Kc) is the product of the concentration of the products raised to their stoichiometric coefficients divided by the product of the concentration of the reactants raised to their stoichiometric coefficients.

Kc = [H₂] × [I₂]/[HI]²

Kc = 4.87 × 10⁻⁴ × 4.87 × 10⁻⁴/ (3.59 × 10⁻³)²

Kc = 0.0184

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.