Knowledge Check Decide whether each chemical reaction in the table below is an oxidation-reduction ("redox") reacti of the reducing agent and the formula of the oxidizing agent. I Don't Know 2HS (g) + O(g) 25 (s) + 2HO(1) 1 2 Ca(s) + O(g) 2CaO (s) HC(aq) + NH,(aq) NH Cl(aq) Submit redox reaction? O yes reducing agent: oxidizing agent: reducing agent: oxidizing agent: Question 4 redox reaction? yes O yes reducing agent: 0 7 oxidizing agent: Ca O no 01 redox reaction? O no no