Part of the SO2 that is introduced into the atmosphere by combustion of sulfur containing compounds ends up being converted to sulfuric acid, H2SO4. __SO2 + __O2 + __H2O __H2SO4
Determine the limiting reactant given that 5.0 mol SO2 is reacting with 44 g O2 and 3.5 x 1024 molecules H2O.
Using this information, what is the mass of H2SO4 that can be formed?

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

the awnser is group 12