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What is the approximate molecular mass of dry air containing 78% nitrogen and 22% oxygen?

Answer»

hi there!!!EXPLANATION:Gn, Mass of NITROGEN = 0.78 gMass of oxygen = 0.22 GTO calculate: molecular mass of dry air.MM of dry air = percentage composition in air * molecular mass of that                                      compound.                       = (0.78)(28) + (0.22)(32)                       = 21.84 + 7.04                       = 28.88 g/mol.Hope my answer HELPS u.......



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