An organic compound has a relative formula mass of 90g. A 7.5g sample contain 3g carbon, 0.5g hydrogen, and 4.0g oxygen. Determine its molecular formula.​

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the answer to this question is 3.

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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