Answer: 15.0 g of
will be formed upon the complete reaction of 27.7 grams of chlorine gas with excess carbon disulfide
Explanation:
To calculate the moles :

The balanced chemical reaction is:
is the limiting reagent as it limits the formation of product and
is the excess reagent.
According to stoichiometry :
4 moles of
give= 1 mole of 
Thus 0.390 moles of will give =
of 
Mass of 
Thus 15.0 g of
will be formed upon the complete reaction of 27.7 grams of chlorine gas with excess carbon disulfide