Solid HS is added to 280 ml of a 0.450M CaCl solution until no more CaS is formed (see reaction below). At the end of the experiment 5.50 g of CaS is formed. What is the percent yield for the reaction? Molar Masses: Ca (40.08), S (32.07), CI (35.45) CaCl (aq) + HS(s) 2HCl(aq) + Cas(s) A Question 5 A system loses internal energy to the surroundings. Under which of the following conditions below will this always be true with respect to the system? E = q + w O All of the above Oq must be negative and w must be positive Oq must be positive and w must be negative Oq must be negative and w must be negative Oq must be positive and w must be positive 3 pts Question 6 3 pts A 9.45g piece of an unknown metal at 193.3 C is placed into a coffee cup calorimeter containing 84.6g of water at 6.0 C. After the metal is added to the water the temperature of the water climbs to 10.5 C. What is the specific heat of the metal in J/(gC)? Note: the specific heat of water is 4.18 J/(gC).