You should be able to talk during moderate exercise, but won't be able to sing, because it would disrupt breathing.
15ml
30kg x 5mg = 150
150 divided by 10 mg/ml= 15ml
<span>Hostility is harmful insofar as it affects one's ability to live their satisfactorily, or affects the lives of others negatively.</span>
This is true because your trying to get a clear message