Convert 1 mm of Hg into pascal. Take density of Hg = 13.6 x 103 kg m-3 and g = 9.8 m s-2

ρ = 13.6 10³ kg m^-3

g = 9.8 m s ^-2

h = 1 mm = 0.001 m

Pressure = h ρ g

= 0.001 × 13.6 × 10³ × 9.8 = 133.28 Pa

Hence, 1 mm of Hg = 133.28 Pa