The table shows the percentages of hydrocarbons that are found in a sample of crude oil. Percentage 30 Hydrocarbons paraffins naphthenes aromatics asphaltics 49 15 6.0 Based on the given information, what is the best classification for this sample of crude oil? an element a pure compound a pure substance a mixture

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

the answer is barium and copper bromide