What is the Kb value for a 0.17M solution of unknown with a pH of 9.45?

Kb = 4.673 E-9

Explanation:

∴ C B = 0.17 M

∴ pH = 9.45

⇒ pOH = 14 - 9.45 = 4.55

⇒ pOH = - Log [OH-]  = 4.55

⇒ [OH-] = 2.8184 E-5 M

mass balance:

⇒ C B = 0.17 M = [B] + [BH+]

charge balance:

⇒ [OH-] = [BH+][H3O+] is neglected, it come frome the water

⇒ [B] = 0.17 - [BH+]

⇒ [B] = 0.17 - [OH-] = 0.17 - 2.8184 E-5

⇒ [B] = 0.16997 M

⇒ Kb = [OH-]² / [B]

⇒ Kb = (2.8184 E-5)² / (0.16997)

⇒ Kb = 4.673 E-9

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.