A manometer is connected to a gas containing bulb. The open arm reads 43.7 cm where the arm connected to the bulb reads 15.6 cm. If the barometric pressure is 743 nm mercury what is the pressure of the gas in a bar?

Solution

Excess space of space pressure space space equals space 43.7 space minus space 15.6 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 28.1 space cm space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 281 space nm therefore space space space Total space pressure space of space the space gas space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 743 space nm space plus space 281 space nm space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 1024 space nm space space space space

Now space 760 space mm space pressure space equals space 1 space bar therefore space space space 1024 space space mm space pressure space equals space fraction numerator 1 space bar over denominator 760 space mm end fraction cross times 1024 space mm space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 1.347 space bar

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