I have a quick question about both solutions: 1. in 2-24: why do they divide the

Question

I have a quick question about both solutions:

1. in 2-24: why do they divide the 10 ppmv by 10^6 m^3? what does 10^6 m^3 represent and where does it come from?

2. similarly, in 2-25, when they rearrange the eq to solve for conc ppmv, why do they multiply by 1m^3/10^6 m^3? its confusing that right before rearranging the eq this term is not included? how can you even have 1 m^3 per 10^6 m^3 if they have the same units this makes no sense to me at all

thank you!

224 Determine the concentration in g/m3 of 10 ppm, (by volume) of trichloroethylene (TCE) (C2HCls) at standard conditions (0°C and 1 atm 2-25 If the concentration of TCE at standard conditions (0°C and 1 atm) is 15 Hg/m3, what is the corresponding concentration in ppm, (by IS volume)?

Explanation / Answer

Actually ppm means parts per million

=Quantity/10^6

So in the both case there is a multiplication of 1/10^6

Is done for it's actual mean what it is.

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