Honors Chemistry Extra Stoichiometry Problems 1. Silver nitrate reacts with barium chloride to form silver chloride and barium nitrate. a. Write and balance the chemical equation. 2 AgNO3 + BaCl2 ! 2 AgCl + Ba(NO3)2 b. If 39.02 grams of barium chloride are reacted in an excess of silver nitrate, how many representative particles (and what type) of silver chloride are produced? 39.02 ! 1 1 ! 208.233 ! 2 1 ! 6.02 10 !" . . 1 = 2.256 10 !" . . c. If 410.8 grams of barium nitrate are produced how many grams of silver nitrate were reacted? 410.8 ( ! ) ! 1 1 ( ! ) ! 261.335 ( ! ) ! 2 ! 1 ( ! ) ! 169.872 ! 1 ! = 534.1 ! 2. Nitrogen gas is reacted with hydrogen gas to form nitrogen trihydride. a. Write and balance the chemical equation. N2(g) + 3 H2(g) ! 2 NH3(g) b. How many liters of nitrogen trihydride are produced at STP if 80.28 grams of hydrogen gas are reacted in an excess of nitrogen? 80.28 ! 1 1 ! 2.016 ! 2 ! 3 ! 22.4 ! 1 ! = 594.7 ! c. How many grams of hydrogen are needed to fully react 621.9 grams of nitrogen gas? 621.9 ! 1 1 ! 28.014 ! 3 ! 1 ! 2.016 ! 1 ! = 134.3 ! d. How many liters of nitrogen gas are needed to completely react 90.38 L of hydrogen gas at STP? 90.28 ! 1 1 ! 22.4 ! 1 ! 3 ! 22.4 ! 1 ! = 30.09 ! OR 90.28 ! 1 1 ! 3 ! = 30.09 !