The following minerals contain zinc. Rank the minerals in order of percent zinc

Question

The following minerals contain zinc.  Rank the minerals in order of percent zinc from least to greatest:  sphalerite, ZnS; smithsonite, ZnCO3; zincite, ZnO; gahnite, ZnAl2O4.                 A. ZnCO3 < ZnAl2O4 < ZnS < ZnO                 B. ZnO < ZnS < ZnAl2O4 < ZnCO3
                C. ZnAl2O4 < ZnCO3 < ZnS < ZnO                 D. ZnO < ZnS < ZnCO3 < ZnAl2O4
                E. ZnAl2O4 < ZnCO3 < ZnO < ZnS The following minerals contain zinc.  Rank the minerals in order of percent zinc from least to greatest:  sphalerite, ZnS; smithsonite, ZnCO3; zincite, ZnO; gahnite, ZnAl2O4.                 A. ZnCO3 < ZnAl2O4 < ZnS < ZnO                 B. ZnO < ZnS < ZnAl2O4 < ZnCO3
                C. ZnAl2O4 < ZnCO3 < ZnS < ZnO                 D. ZnO < ZnS < ZnCO3 < ZnAl2O4
                E. ZnAl2O4 < ZnCO3 < ZnO < ZnS ZnCO3 < ZnAl2O4 < ZnS < ZnO ZnO < ZnS < ZnAl2O4 < ZnCO3
ZnAl2O4 < ZnCO3 < ZnS < ZnO ZnO < ZnS < ZnCO3 < ZnAl2O4
ZnAl2O4 < ZnCO3 < ZnO < ZnS                 A. ZnCO3 < ZnAl2O4 < ZnS < ZnO                 B. ZnO < ZnS < ZnAl2O4 < ZnCO3
                C. ZnAl2O4 < ZnCO3 < ZnS < ZnO                 D. ZnO < ZnS < ZnCO3 < ZnAl2O4
                E. ZnAl2O4 < ZnCO3 < ZnO < ZnS

Explanation / Answer

C ZnAl2O4 < ZnCO3 < ZnS < ZnO

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