A United Nations toxicologist studying the properties of mustard gas, S(CH2CH2Cl)2 , a blistering agent used in warfare, prepares a mixture of 0.675 M SCl2 and 0.973 M C2H4 and allows it to react at room temperature (20.0 ºC). At equilibrium the concentration of mustard gas at equilibrium is 0.350 M. Calculate Kc.
SCl2(g) + 2C2H4(g) ↔ S(CH2CH2Cl)2(g)
A. 14.4
B. 3.94
C. 0.0249
D. 5.34
E. 6.8 x 10-2