Hydrogen and chlorine react to form hydrogen chloride, like this: H2(g) + Cl,(g) → 2 HCl(g)
Also, a chemist finds that at a certain temperature the equilibrium mixture of hydrogen, chlorine, and hydrogen chloride has the following composition:
compound pressure at equilibrium
H2 0.78
Cl2 1.2M
HCl 1.6M
Calculate the value of the equilibrium constant for this reaction. Round your answer to significant digits.

The value of the equilibrium constant for this reaction is 2.7

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as  

For the given chemical reaction:

The expression for is written as:

Thus the value of the equilibrium constant for this reaction is 2.7

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.