acids and bases chemical reaction equilibrium chemistry organic chemistry chemical reactions activation energy dna molecule living organisms acyl alkyne glucose Organic hydrogen peroxide ketone substrates local anesthetic constituents atomic mass carbon atoms sodium alkenes concentration methanol isomer alkene reagents chromosomes dehydration electron pair hydrogen bonds presence electrons aspirin room temperature hydrogen oxidation derivatives exothermic reaction phosphate highest energy selectivity ammonia carbon dioxide diels alder reaction dehydration reaction atomic weights ethers heat flow organic solvents catalyst molecules racemic mixture catalysts amino acids intermediates esters reactants correlation junior chemistry journal article transition state water molecules temperatures reagent single step atom alcohols cytosine protons neutrons and electrons chemicals thymine cesium electron density krebs cycle proteins joules cell cycles electrophile protons pyruvate synthesis organic reactions metabolism carbons solvent cis acetone electron acceptor byproducts cells nucleophile salicylic acid catalytic hydrogenation hydrogen gas covalent bonds atoms alcohol chirality molecule