(B1-MC-12) How many of the following are oxidation-reduction reactions? NaOH (aq) + HCl (aq) → NaCl (aq) + H2O (l) Cu (s) + 2AgNO3 (aq) → 2Ag (s) + Cu(NO3)2 (aq) Mg(OH)2 (s) → MgO (s) + H2O (l) N2 (g) + 3H2 (g) → 2NH3 (g) a. 0 b. 1 c. 2 d. 3 e. 4

C

Explanation:

They involve losing and gaining of electrons therefore there is a change of state from either solid to aqueous or vise versa

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.