In the oxidation-reduction reaction h2o + 2mno2 + zn → mn2o3 + zn(oh)2, the half-reaction of the zinc is? a. zn(oh)2 → zn + 2e- b. zn(oh)2 → zn + 2oh- c. zn + 2oh- → zn(oh)2 + 2e- d. zn + 2oh- + 2e- → zn(oh)2

D

Explanation:

2MnO2 + H2O => Mn2O3 + 2OH is the correct balanced equation. All others are missing or have incorrect coefficients.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).