Apure silver ring contains 2.10×1022 silver atoms. part a how many moles of silver atoms does it contain?

The number of moles of silver atoms it contain =0.0349 moles

calculation

by use of Avogadro's law constant

that is 1 mole= 6.02 x10^23 atoms

               ?      = 2.10 x10 ^22 atoms

=(2.10 x10^22 atoms x 1 moles)/(6.02 x10^23 atoms) =0.0349 moles

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.

that's it!

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~ trueboss72