(ow many grams of chlorine gas are needed to react completely with 15.0 grams of aluminum according to the following vation? 2Al(s)+3Cl2(g)2AlCl3(s) 15. Write a balanced chemical equation to describe the reaction that occurs when aqueous solutions of tin(IV) nitrate and potassium arsenate react. Include phase notations. 16. According to the following balanced reaction, how many moles of NO are formed from 8.44 moles of NO2 in the presence of exeess water? 3NO2(g)+H2O(l)2HNO3(aq)+NO(g) 17. A 14.01g sample of N2 reacts with 3.02g of H2 to form ammonia (NH3). What mass of ammonia is formed