Ch. 9 stoichiometry test [45 points] Honors Chemistry


Show your work in an organized manner, includes any relevant equation / formula, proper units in your work / answer, and the proper number of significant figures in your answer. 15 points per problem.


1. What is the mass of the precipitate formed by mixing aqueous solutions containing 100.0 g silver nitrate and 100.0 g copper (II) nitrate ?


2. How many grams of ethanol (C2H5OH) and oxygen (O2) would be needed to form 10.0 grams of water in a reaction involving the combustion of ethanol and oxygen ?


3. What is the % yield in the chemical reaction:   excess N2   +   5.0 g H2   -->    20.0 g NH3 ?