Respuesta :

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Answer:

1 atm  

Explanation:

The normal boiling point of a liquid is temperature at which the vapour pressure of the liquid equals 1 atm.  

If the normal boiling point of cyclohexane is 81.0 °C, the vapour pressure of the liquid is 1 atm.

The graph below shows that the vapour pressure of cyclohexane reaches 1 atm at about 81 °C.

Ver imagen znk