Concentration in ppm question

[From: ] [author: ] [Date: 12-11-12] [Hit: ]

the danger point in breathing SO2 for humans is 2620 micrograms per metre cubed, what is the concentration in ppm?

1m^3 x (10dm/m)^3 x 1L/dm = 1000L
2620mcg = 2.62mg
1ppm = 1mg/L
2.62mg / 1000L = 2.62x10^-3ppm

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