For this question, since the parameters volume, pressure and temperature changes, we can use the combined gas law equation.
It states that PV/T = constant
Therefore,
[tex] \frac{P1V1}{T1} = \frac{P2V2}{T2} [/tex]
Where parameters for the first instance are given on the left side and parameters for the second instance are given on the right side of the equation
Temperature in K - T1 = 6 °C + 273 = 279 K
T2 = 34 °C + 273 = 307 K
substituting the values in the equation
[tex] \frac{23.0 torr*V}{279K} = \frac{78 torr*18 mL }{307 K} [/tex]
V = 55.5 mL
