Ineed with chemistry for valence electrons

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration?

What reaction is taking place? 02 + c3h8 = h20 + co2

22. a flask containing 450 ml of 0.50 m h2so4 was accidentally knocked to the floor. how many grams of nahco, do you need to put on the spill to neutralize the acid according to the following equation: h2so4(aq)+2 nahcos(aq) na, so(aq) +2 h20()+2 co2(g) d) 38 g a) 2.3 g b) 9.5 g c) 19 g