Rochel Roary
Tuesday, August 2, 2011
Chemistry mass problem?
What mass of chromium is present in 234 grams of an ore of chromium that is 55% iron (II) dichromate, FeCr2O7, and 45% impurities by mass? If 90% can be recovered from 400.0 grams of the ore, what mass of chromium is obtained?
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