[Constantine]

Does chemistry have such a term as "nitration modulus" with respect to portions of a nitrating agent and a nitrated substance? It is concerned with urea nitration with a mixed acid. Or may I use the term "mass ratio of nitrating agent/urea instead of the former term?

[Arkcon]

I'm afraid you may be using jargon, appropriate for the nitration application, that is not in common use.  One thing for sure, your example, the nitration of urea, is not a topic of discussion for this forum.  We do allow general discussions on theoretical concepts, but the direct mention of the production of an explosive, especially one that is most commonly used by novices for terror purposes -- that is not allowed.  If you really need to understand these concepts, you can start another thread, trying to keep the topic more abstract.  This one is locked.