A sample of a compound that is known to contain only carbon, hydrogen and oxygen is combusted and they produced are trapped and weighed 8.38g and yeiled 16.0g carbon dioxide and 9.5g hydrogen.. what is the empirical formula

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.