Answer: The moles of product present in the vessel is 0.092 moles
Step-by-step explanation:
For the given chemical equation:

We are given:
Initial moles of reactant = 0.200 moles
Unreacted moles of reactant = 0.108 moles
Reacted moles of reactant = 0.200 - 0.108 = 0.092 moles
By Stoichiometry of the reaction:
1 mole of reactant produces 1 mole of product
So, 0.092 moles of reactant will produce =
of product
Hence, the moles of product present in the vessel is 0.092 moles