I am studying for a test and this is a question I got incorrect on an assignment. They give us the correct answer, but since we only hand in our answers (and not the work shown), I don't know how they got it. I wonder if someone could, in the 'dumbest' way possible, explain this to me. Chemistry is not my forte. --------- An ore contains 42.9% of the mineral CaF2, which is a source of the elemtn F. How much ore must be processed in order to obtain 42.0 kg of F? --------- The answer (the correct one) is 201 kg. Please help! Thank you.