Answer
(b) produces the greatest amount of products.
3 $Cl_2$ molecules.
Work Step by Step
1. Count the amount of each reactant in each diagram:
a. 7 HCl and 1 $O_2$
b. 6 HCl and 3 $O_2$
c. 4 HCl and 5 $O_2$
2. Determine the amount of $H_2O$ each diagram will produce.
a. 7 HCl produce 3.5 $H_2O$, and 1 $O_2$ produce 2 $H_2O$. Therefore, this mixture will produce 2 $H_2O$.
b. 6 HCl produce 3 $H_2O$, and 3 $O_2$ produce 6 $H_2O$. Therefore, this mixture will produce 3 $H_2O$.
c. 4 HCl produce 2 $H_2O$, and 5 $O_2$ produce 10 $H_2O$. Therefore, this mixture will produce 2 $H_2O$.
3. The one that produces the greatest amount of products is (b).
4. According to their balance coefficients, the amount of $H_2O$ produced is the same as the amount of $Cl_2$ produced. Therefore, (b) produces 3 $Cl_2$
