A student needs to prepare 50.0 mL of a 1.10 M aqueous H2O2 solution. Calculate the volume of 5.1 M H2O2 stock solution that should be used to prepare the solution.

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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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