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The molecular formulas of methane, ethane and butane are CH4, C2H6 and C4H10, respectively. What would be their empirical formulas respectively?

The molecular formulas of methane, ethane and butane are CH4, C2H6 and C4H10, respectively. What would be their empirical formulas respectively? Correct Answer CH<sub>4</sub>, CH<sub>3</sub> and C<sub>2</sub>H<sub>5</sub>

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