What is the total number of moles in a mixture of 20.0 g of H2O2, 1.20 x 1024 molecules of SiO2, and 3.70 mol of I2?

the answer is true.

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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