The following reaction was carried out in a 2.25 l reaction vessel at 1100 k: c(s)+h2o(g)⇌co(g)+h2(g) if during the course of the reaction, the vessel is found to contain 6.75 mol of c, 15.0 mol of h2o, 3.60 mol of co, and 6.40 mol of h2, what is the reaction quotient q? enter the reaction quotient numerically.

h

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.

im pretty sure its b