On analyse le contenu en poussières dans l'air près d'une cimenterie.À l'aide d'un échantillonneur, on recueille sur un filtre de masse 11.6564g la poussière pendant 28heures avec un débit de 46 L/min.Une fois séché le fitre pèse 11.8383g. Quelle est la concentration des poussières em mg/m3?
English:
You analyzed the air next to a cement work place. The sample you filtered has 11.6564g of dust, this was optained after 28 hours with a 46L/min flow. Once the filter is dry, he weights 11.8383g. Whats the concentration in mg/m3?
I have no idea where to start, thx for the help.
English:
You analyzed the air next to a cement work place. The sample you filtered has 11.6564g of dust, this was optained after 28 hours with a 46L/min flow. Once the filter is dry, he weights 11.8383g. Whats the concentration in mg/m3?
I have no idea where to start, thx for the help.