Which one of these chemical equations has a molar ratio with the smallest difference between elemental sodium (Na) as a reactant and the chemical formed as a product.

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Answer( precipitate );

3-isopentane; 3-methylbutane, and 1,2-methylpropane do not meet iupac rules, so they are wrong names.the only valid name onthe list is 2-methylbutane, which is the same isopentane.this is its formula:                   ch2                    |ch3 - ch - ch2 - ch3answer: 2-methylbutane