Pyridine reacts with hydroxide by nucleophilic aromatic substitution. complete the mechanism by drawing curved arrows, the structure of the charged intermediate, and the structure of the major uncharged product. all non-bonding electrons must be shown, including those associated with charges.

whats the meaning of /

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )