A manomete is connected to a gas containing bulb. The open arm reads `40.0 cm` where as the arm connected to the bulb reads `15.0 cm`. If barometric pressure is `74.0 cm Hg`, then what is the pressure of gas in bar?

Explanation

Difference in mercury levels of two arms `=40.0-15.0`
`=25.0 cm`
Since level of `Hg` in the , limb connected to gas bulb is lower than that in open limb, this means that gas pressure is more than the atmosphere pressure.
`:.` Gas pressure `=` (Barmetric pressure)+(Difference in `Hg` levles)
`=74.0cm +25.0 cm=99.0 cm`
or `(99.0)/(76)atm` or `(99.0xx1.01325)/(76)"bar"`
`=1.319"bar"`