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The pressure of the gas is equal to the pressure exerted by the mercury column. The pressure exerted by the mercury column is calculated as follows:
Pressure = Density of mercury
Gravity
Height of mercury column
Density of mercury = 13.6 g/cm³
Gravity = 9.8 m/s²
Height of mercury column = 34.6 cm = 0.346 m
Pressure = 13.6 g/cm³
9.8 m/s²
0.346 m = 461 torr
Therefore, the pressure of the gas is 461 torr.