What is dimensional analysis? How is it used?

dimensional analysis is the way of converting different units. when you add two physical quantities or equate them they must be in same units.

uses:

to check the correctness of a physical formula

to convert the value from the one system to another.

to form a relationship between different physical quantities

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