6786. Pick out the wrong unit conversion of mass transfer co-efficient. September 7, 2025 by Admin 1 lb/hr.ft³.atm. = 4.8182 kg/hr.m².bar 1 kg/hr.m².atm= 0.98687 kg/hr. m .bar 1 lb/hr . ft² = 4.8823 kg/hr . m² 1 kg/hr . m² = 4.8823 lb/hr . ft² ✅ The correct answer is option D.