Rate expression for ammonia synthesis is___________________? March 17, 2019 – by admin Rate expression for ammonia synthesis is___________________? A. Kc=x2/(a-x)(b-x) B. Kc=x2/v(a-x) C. Kc=4×2/(a-2x)2(b-x)D. Kc=4x2v2/(a-x)(b-3x)3