A 185 m3 room must be filled with 4 ppm NO2 gas (Nitrogen dioxide). The gas comes in cylinder of 200 bar and 50 liters (20x50 = 10,000 liters) and 50 ppm. How many cylinders are needed?
1 ppm = 1/1,000,000 (parts per million)
(can't think of more relevant equations)
The Attempt at a Solution
To be honest I do not know how to begin. The ppm part is completely new to me.
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