Butane is a common fuel used in cigarette lighters and camping stoves. normally supplied in metal containers under pressure, the fuel exists as a mixture of liquid and gas, so high temperatures may cause the container to explode. at 25.0°c, the vapor pressure of butane is 2.30 atm. what is the pressure in the container at 109.0°c? (ah vap 24.3 kj/mol.)

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

solute : a solute is a substance that is dissolved in another substance is known as a solvent. it is mixed with a special mixture know as homogeneous mixture.

solvent: a solvent is a substance that dissolved a solute, which results in a solution is known as solvent.