Galena is the ore from which elemental lead is extracted. In the first step of the extraction process, galena is heated in air to form lead(II) oxide.
2PbS(s) + 3O2(g) 2SO2(g) H = -827.4 kJ
What mass of galena is converted to lead oxide if 975 kJ of heat are liberated?
A) 203 g
B) 282 g
C) 406 g
D) 478 g
E) 564 g
Correct Answer:
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