Iam having a really hard time with this subject.

now that you have learned about balancing equations, explain to me why you are only allowed to change to numbers out front of bonds, and not the small numbers behind the elements (subscripts).

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.