Check this?

Convert 220ppm of HC into ug/m^3

1mg/m^3 /is not equal to 1ppm
1ug/m^3 is not equal to 1ppb
1ng/m^3 is not equal to 1ppt

mg/m^3 = ppm x (MW/24.5)
ppm = (mg/m^3) x (24.5/MW)

where MW is the molecular weight.

(mg/m^3) = 220 x (15/24.5)
134.6938776mg/m^3
134.7mg/m^3

134.7 x 10^6 = 134700000ug/m^3

Question

Check this?

Convert 220ppm of HC into ug/m^3

1mg/m^3 /is not equal to 1ppm
1ug/m^3 is not equal to 1ppb
1ng/m^3 is not equal to 1ppt

mg/m^3 = ppm x (MW/24.5)
ppm = (mg/m^3) x (24.5/MW)

where MW is the molecular weight.

(mg/m^3) = 220 x (15/24.5)
134.6938776mg/m^3
134.7mg/m^3

134.7 x 10^6 = 134700000ug/m^3

anonymous · Answer

@UnkleRhaukus :P

unklerhaukus · Answer

what is HC  ?

anonymous · Answer

the whole thing is flawed then, I thought it was just 1 hydrogen and  1 carbon (without thinking)

Hydrocarbon

unklerhaukus · Answer

strange question,   i kinda have to go now, 
can you find someelse to help ya?