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# PPM to Weight in a room Watch

1. Hey guys, I've got answers ranging from 50 lbs to 2.2 lbs and i need a definite on this one. How many lbs of ammonia (NH3) were in a room at a given ppm. I need to know how many LBS of ammonia were in the room

Room size: 24000 Cu/ft
PPM of ammonia: 40
2. I'm not sure you've given quite enough information but try this for size-

40 ppm (is it v/v or w/v; presumably v/v?) is 40 ml/m3

24000 cubic feet is 680 m3

Total volume of ammonia is therefore 40 x 680 = 27.2 litres

1 mole of an ideal gas occupies 22.4 litres, therefore have 1.21 moles of ammonia

1.21 moles of ammonia has a mass of 18 g (0.04 lb)

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Updated: April 19, 2013
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