 We extend the derivation of the 2MA by establishing two advances to previous efforts: a) relative concentrations and b) non-elementary reactions.
<fluency>  We extend the derivation of the 2MA by establishing two advances to previous efforts: a) relative concentrations and b) non-elementary reactions.
 We extend previous derivations of 2MA by establishing two advances to previous efforts: a) relative concentrations and b) non-elementary reactions.