Match the effects on the concentration of SO2 gas when the following changes occur after initial equilibrium has been established in this system (N. C = no change).
2SO2(g) + O2(g) 2SO3(g) + 46.8 kcal
pressure increases
increase [02]
increase volume of chamber
adding a catalyst
raising the temperature

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.      

i think its 100

i hope this !