Question

In Appleton, Wisconsin, the median indoor airborne concentration of chloroform (CHCl3) was found to be 0.35μg m-3. Convert this concentration to a mole fraction in parts per billion (ppb) assuming that T = 293 K and P = 1 atm.

Answer 1

Answer : The concentration to a mole fraction in parts per billion (ppb) is, 350 ppb

Explanation :

As we are given that the concentration of chloroform is,
`0.35\mu g/m^3`.

Now we have to convert it into parts per billion (ppb).

As we know that,

`1\mu g/m^3=10^(-6)g/m^3`

and,

`1\text{ ppb}=10^9`

So,

`0.35\mu g/m^3=0.35* 10^(-6)g/m^3=0.35* 10^(-6)* 10^9\text{ ppb}=350\text{ ppb}`

Thus, the concentration to a mole fraction in parts per billion (ppb) is, 350 ppb