[Hypnoz]

Dear

I'm having difficulty with a task concerning chemical exercises.

I tried to solve an exercise myself but I'm wondering if my results are correct.

1.    Calculate how much the MAC-value of ozone is in ppm and using the data from the paper article below.

Exceeded ozone threshold
For the first time this year, there is too much ozone measured in the air.
In Dessel there was 212 micrograms of ozone per cubic meter of air measured this Saturday, well above the standard of 180 micrograms / m³.

My results: ((212 ug/m³) / (180ug/m³) )*10^6 = 1 177 777,78

However I'm not entirely sure of this result is correct or how to solve this exercise otherwise..

Below you can find the other exercise I'm trying to solve now but of course all help is welcome.

2.   The sulfur dioxide concentration in the ambient air is often expressed in ppb volume units. Calculate the concentration in mg / m3 to 1 ppb sulfur dioxide at 20 ° C and normal atmospheric pressure corresponds.

Kind regards

[mjc123]

The MAC (maximum admitted concentration) is not the measured concentration as ppm of the "standard". It is (I assume) the "standard", expressed as ppm. What is the mass of 1 m³ of air? What is 180 µg as a fraction of this, expressed in ppm?