The gas phase decomposition of sulfuryl chloride at 600 K SO2Cl2(g)SO2(g) + Cl2(g) is first order in SO2Cl2. During one experiment it was found that when the initial concentration of SO2Cl2 was 4.80×10-3 M, the concentration of SO2Cl2 dropped to 6.24×10-4 M after 531 min had passed. Based on this experiment, the rate constant for the reaction is min-1

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.

explanation: no but i do not usually comment

i believe the answer is 5,000