An Organic Compound Is to Be 24

An organic compound is to be 24.78% C,2.08% H,and 73.14% Cl by mass.At 373 K and 0.987 atm,0.800 g of this gas occupies 256 mL.How many moles of gas are present,and what is its molecular formula?

A) 0.969 mol; C₂H₄Cl
B) 0.00825 mol; C₂H₂Cl
C) 0.116 mol; C₃H₃Cl₃
D) 0.00825 mol; C₂H₂Cl₂
E) 0.0815 mol; C₂H₄Cl₂