17. For molecules of comparable mass, why are dipole-dipole forces stronger than dispersion forces? (2 points) O Dipole-dipole forces involve specific areas of the molecule, while dispersion acts throughout.
O Dipole-dipole exists between permanent dipoles, while London dispersion exists between temporary dipoles.
O Dipole-dipole forces are intra-molecular and are stronger than intermolecular forces.
O Dipole-dipole forces occur between molecules,, and London dispersion forces do not.

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answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

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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.