What is the activation energy for the reaction in this energy diagram?

a.
+40 kj
b.
+60 kj
c.
+80 kj
d.
+20 kj
e.
+100 kj

What is formed when amino acids form long chains or polymerize

Aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. how many grams of aluminum sulfate would be formed if 250 g h 2 so 4 completely reacted with aluminum? 2al( s ) + 3h 2 so 4 ( aq ) ? al 2 (so 4 ) 3 ( aq ) + 3h 2 ( g )

The process by which liquid water changes into water vapour is called what ?