4. During what process does ammonia (NH3) convert to nitrate ions (NO3)- ? a. Nitrogen fixation
b. Nitrification
c. denitrification

Hey!me its for an important test! ! which issue during the progressive era would most likely have united mary harris "mother” jones and lewis hine? a) ending child labor b) regulating monopolies c) using photography to expose poor working conditions d) exposing the lack of jobs available for untrained laborers