please answer ALL thanks

19. What reaction is spontaneous for the following cell? Ag/AR+Fe/Fe2+E+=0.80VE2=0.44V a. 2Ag++Fc2Ag+Fe2+ b. 2Ag+Fc2+2Ag++Fe c. 2Ag+Fe2+2Ag+Fe d. There is no spontaneous reaction fis this cell. 20. Which metal will react spontancously with Ca2+(ag) at 25C ? a. Ag b. c. Me d. Hg 21. Balance the following redox cquatice using the method of your choice. Show all your work. Fe2O3+COFe+CO2 22. Balance the following redox equation uting the methed of your choice. Show all your work. Sn+HNOHHSnOS+NO 23. For the following reactions, write a balenced eyation suing half-reactions, write down the voltage to be expected and wnite down wbether or not the teaction would proceed on itr own as written. a. Sodium and water to prodace sodiam iens, hydroxide ions and hydrogen. b. Aluminum and copper (II) ions to produce aluminum ioes and copper. 19. What reaction is spontaneous for the following cell? Ag/AgE=0.80VFeFe2+E=0.44V a. 2Ag++Fe2Ag+Fe2+ b. 2Ag+Fe2+2Ag+Fe c. 2Ag+Fe2+2Ag+Fe d. There is no spontaneous reaction for this cell. 20. Which metal will react spontancously with Cu2(aq) at 25C ? 3. Ag b. Au c. Mg d. Hg 21. Balance the following redox equation using the method of your choice. Show all your work. Fe2O3+COFe+CO2 22. Balance the following redox equation using the method of your choice. Show all your work: Sn+HNO3H2SnO3+NO 23. For the following reactions, write a balanced equation using half-reactions, write down the volage to be expected and write down whether or not the reaction would proceed on its own as written. a. Sodium and water to produce sodium ions, hydroxide ions and hydrogen. b. Aluminum and copper (II) ions to produce aluminum ions and copper