Ethane, C2H6, dissociates into methyl radicals by first-order reaction at elevated temperatures. If 250 mg of thane is confine to a 500 mL reaction vessel and heated to 700 degrees Celsius, what is the initial rate of ethane decomposition if k = 5.5 x 10^-4 s^-1 in the rate law (for the rate of dissociation of c2h6)?