Enthalpy change = energy products -
energy reactants
Standard enthalpy change of a reaction is the energy change when the number of moles of reactant in a reaction react together to form products under standard condition.
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Answer
there is 2 electrons on that atoms
Explanation:
Because each carbon atom can form for chemical bonds to another’s atoms and because the carbon atom is just the right small size to fit in comfortably as parts of very large molecules