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18 September, 16:23

A 1.50 liter flask at a temperature of 25°C contains a mixture of 0.158 moles of methane, 0.09 moles of ethane, and 0.044 moles of butane. What is the total pressure of the mixture inside the flask?

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  1. 18 September, 16:54
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    The total amount of moles inside the flask is

    n = 0.158 + 0.09 + 0.044 = 0.292 mole

    According to Boyle's Law, the total pressure of a mixture in a container does not depend on the identity of the gas and only on the amount of the number of moles. So, assuming the mixture behaves like an ideas gas:

    P = nRT/V = 0.292 (0.08206) (25+273) / (1.50)

    P = 4.76 atm
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