Definition:
--ratio between the amount of reactants and the amount of products produced by the reactants in a chemical reaction.
--it is based on the fact that all atoms are conserved in a chemical reaction.
Calculation:
Question:
How many moles of Cl2 are needed to produce 3.4 moles of NaCl in the chemical reaction which sodium metal and chlorine gas combine to form solid sodium chloride?
Step 1:
Write a balanced equation.
2 Na(s) + Cl2(g) --> 2NaCl(s)
Step 2:
Find the ratio for NaCl to Cl
Cl2/NaCl = 1/2
Step 3:
Convert into NaCl
3.4 moles NaCl x 1 mole of Cl2/2 moles of NaCl = 1.7 moles of Cl2
