Problem: Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 oC. A 250 mL sealed flask contains 0.65 g of butane at -22 oC. How much butane is present as a liquid?

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Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 oC. A 250 mL sealed flask contains 0.65 g of butane at -22 oC. How much butane is present as a liquid?

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