1. A perpetrator contemplated producing hydrogen cyanide (HCN) gas to kill his victims, which he would produce by mixing calcium cyanide, Ca(CN)2, with phosphoric acid, H3PO4, to produce hydrogen cyanide (HCN) gas and the calcium phosphate, Caz(PO4)2, salt. , a) Write the reaction of calcium cyanide with phosphoric acid a b) If the hydrogen cyanide (HCN) gas produced from the reaction of the calcium cyanide with phosphoric acid fills a 10.00 ft x 9.50 ft x11.5 ft room with 535 ppm of asphyxiating gas (HCN), suffocation and death can occur within minutes. How much calcium cyanide, in grams, would have had to react with excess phosphoric acid for death to occur by suffocation. Assume room temperature and pressure