Look at the chemical reaction below.

ammonium hydroxide → ammonia + water

nh4 → nh3 + h2o

in this reaction:
ammonia (nh3) is a?

The rapid decomposition of organic matter produces evidence which supports: the slow accumulation of coal deposits long ages of the earth rapid burial of vast amounts of vegetation biblical account of noah's flood

Ialready know the answers to these questions and they are on the attachment. but i just need to know why that answer is the correct one. plz asap! this is for a report that i need to email by 10!

What materials must dams have to produce electricity, and what must occur?