1. Learning Check Acetylene gas C 2 H 2 burns in the oxyacetylene torch for welding. How many grams of C 2 H 2 are burned if the reaction produces 75.0 g CO 2 ? 2C 2 H 2 (g) + 5O 2 (g) 4CO 2 (g) + 2H 2 O(g) C 12.01 g/mol H 1.008 g/mol O 16.00 g/mol

2. Limiting Reactant What is the limiting reactant when 2.00g of Na and 2.00g of Cl 2 combine as follows: 2Na + Cl 2 2NaCl Na 22.99 g/mol Cl 35.45 g/mol

3. Problem continued…. How many grams of the remaining reactant would be left over once the reaction has run to completion? 2Na + Cl 2 2NaCl

4. Problem continued…. If the actual yield of NaCl is 2.29g, what is the percent yield?