Chloroethene, ${{\text{C}}_{\text{2}}}{{\text{H}}_{\text{3}}}{\text{Cl}}$, reacts with oxygen according to the equation below.

$$2{{\text{C}}_2}{{\text{H}}_3}{\text{Cl(g)}} + 5{{\text{O}}_2}({\text{g)}} \to {\text{4C}}{{\text{O}}_2}({\text{g)}} + 2{{\text{H}}_2}{\text{O(g)}} + 2{\text{HCl(g)}}$$

What is the amount, in mol, of ${{\text{H}}_{\text{2}}}{\text{O}}$ produced when 10.0 mol of ${{\text{C}}_{\text{2}}}{{\text{H}}_{\text{3}}}{\text{Cl}}$ and 10.0 mol of ${{\text{O}}_{\text{2}}}$ are mixed together, and the above reaction goes to completion?

A.     4.00

B.     8.00

C.     10.0

D.     20.0

A