Chemistry

Problem

A 10.0 g ore sample contains 85.0% CuS by mass. The CuS is completely roasted in excess O2 according to 2 CuS(s) + 3 O2(g) → 2 CuO(s) + 2 SO2(g). What mass of CuO(s) is produced? a)

8.4\ \text{g}

7.1\ \text{g}

9.8\ \text{g}

6.0\ \text{g}

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