text: hello ppl!how do i convert 15.7kg of no2/hectare/year into ppm (part per million)? hi! i know this might sound strange but, can anyone give me a hand here? chemistry was never my strong hobby! :/ anywya, if u know how to solve this would u b so kind and post the formula u used to do this conversion? thanx in advance!!! part of your question is missing!  provide the full question for a complete answer.