Question

Assume that the NO, concentration in a house with a gas stove is 150 pg/m°. Calculate the equivalent concentration in ppm at STP.

Answer 1

Explanation:

It is known that for $NO_{2}$, ppm present in 1 $mg/m^{3}$ are as follows.

                      1 $\frac{mg}{m^{3}}$ = 0.494 ppm

So, 150 $pg/m^{3}$ = $\frac{150}{1000} mg/m^{3}$

                       = 0.15 $mg/m^{3}$

Therefore, calculate the equivalent concentration in ppm as follows.

             $0.15 \times 0.494 ppm$

              = 0.074 ppm

Thus, we can conclude that the equivalent concentration in ppm at STP is 0.074 ppm.