Hydrogen peroxide (H2O2) is unstable under certain conditions and decomposes as follows: 2H2O +O2 2H202 40 g? What will be the result when starting with 40 grams of hydrogen peroxide?

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.

so what is the problem with your lab report and whats the subject of the lab report? i will you

може ли да зареждате повече информация, моля