Rate Constant of Zero Order Rxns for Macrofluids is the 1st step where the value of Rate Constant is Obtained, when reactant Contains Macrofluid. And is denoted by k0,Macrofluids. Rate Constant of Zero Order Rxns for Macrofluids is usually measured using the Mole per Cubic Meter Second for Reaction Rate. Note that the value of Rate Constant of Zero Order Rxns for Macrofluids is always positive.