Calculate the equilibrium constant K for the following reaction: H2(g) + Cl2(g) ⇋ 2 HCl (g) at equilibrium, [HCl] = 0.50 M, [H2] = 0.75 M, [Cl2] = 0.25 M

K = 1.33

Explanation:

[HCl] = 0.50M

[H₂] = 0.75M

[Cl₂] = 0.25M

equation of reaction,

H₂ + Cl₂ ⇄ 2HCl

K = [Products] / [Reactants]

K = [HCl]² / [H₂][Cl₂]

K = [0.5]² / [0.75][0.25]

K = 0.25 / 0.1875

K = 1.33

The equilibrium constant K is equal to 1.33

the answer is either b or c

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms