What is the concentration in (a) ppmv, and (b) percent by volume, of carbon monoxide (co) that has a concentration of 35 mg/m3? the problem conditions are temperature = 25oc and pressure = 1.0 atm?

Molar mass of carbon monoxide () =

Concentration of carbon monoxide () = (given)

Since,

So, the concentration of carbon monoxide () =

a. ppmv stands for parts per million by volume is defined as the volume of a substance dissolved in one million parts per volume of the liquid.

The formula used for determining the volume is:

 -(1)

where,

is volume, is number of moles, is universal gas constant, is temperature and is pressure.

For determining number of moles, :

Temperature,

Pressure, =

Substituting the values in formula (1):

Now converting to ppmv as:

b. Percent by volume is calculated as:

%.

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