the substance air
(Forall (?Self ?Time) (=> (Active ?Time Air ?Self) (And (= (Lambda (?T) (If (= ?T ?Time) (Value-At (Molecular-Weight ?Self) ?T))) 28.97) (= (Lambda (?T) (If (= ?T ?Time) (Value-At (Critical-Temperature ?Self) ?T))) 133) (= (Lambda (?T) (If (= ?T ?Time) (Value-At (Critical-Pressure ?Self) ?T))) 37.7) (= (Lambda (?T) (If (= ?T ?Time) (Value-At (Ideal-Gas-Constant ?Self) ?T))) 286.99)))) (Forall (?Self ?Time) (<=> (Active ?Time Air ?Self) (And (Air ?Self) (Active ?Time Substance ?Self))))