Calculate the concentration of h+ ions in a 0.010 m aqueous solution of sulfuric acid. express your answer to three decimal places and include the appropriate units.

Assuming that the concentration is given as 0.010M (there is a big difference between m and M):

Sulfuric Acid (H2SO4) is a strong acid, and thus will completely dissociate into ions in solution.  This will result in

For each mole of H2SO4, there will be 2 moles of H+.  So, [H+] = 0.0200M

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.