The gas phase decomposition of ethylamine produces ethane and ammonia according to the following equation:- C_{2}H_{5}NH_{2} (g) → C_{2}H_{4} (g) + NH_{3} (g) The following total pressures were found for this reaction at 500°C with an initial pressure of pure ethylamine equal to 55 mm Hg. Ptotal (mm Hg) time (min) 55 0 64 2 72 4 89 10 93 12 If P_{0} is the initial pressure of reactant and ptotal is the total pressure at time t, show how the the partial pressure of reactant remaining at time t can be found. Can anyone give hint to me how to start to solve this question? is it i have to apply avogadro's law?