Glucose, better known as table sugar, is a covalent compound, which conclusion would best be drawn from this information?
O glucose has a high melting point
O glucose is a strong conductor of electricity
glucose has a low melting point
glucose is made of metal and nonmetal elements

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.

i think its 100

i hope this !

5.6⋅10−^19  j

do you need the explaination?