Molar flow has the dimension amount of substance per time. The SI composite unit of molar flow is the mole per second.

Maple knows the units of molar flow listed in the following table.

An asterisk ( * ) indicates the default context, an at sign (@) indicates an abbreviation, and under the prefixes column, SI indicates that the unit takes all SI prefixes, IEC indicates that the unit takes IEC prefixes, and SI+ and SI- indicate that the unit takes only positive and negative SI prefixes, respectively.  Refer to a unit in the Units package by indexing the name or symbol with the context, for example, katal[SI] or kat[SI]; or, if the context is indicated as the default, by using only the unit name or symbol, for example, katal or kat.

The unit of molar flow is defined as follows.

A katal, which is used to describe enzymatic activity, is defined as a mole per second.