# 1.Write the possible products and determine if the reaction

1.Write the possible products and determine if the reaction will occur.Include which products are insoluble and which are soluble. Ca(NO3)2+NaCI 2. Determine the percent mass of Sulfer in the molecules of H2SO4. Show how you found the answer. 3. 2C2H6+7O2=4CO2+6H2O (Two part question) 1. How many moles of oxygenwould you need to produce 25 moles of CO2? 2. How many moles of waterwould be produced if you used 32 moles of O2? (Show how you did both ofthese) 4. Describe the first step in a stoichiometry problem. Why is it vitalto complete this step before beginning any calculations?