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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) → 2PbO(s) + 2SO2(g) ΔH = −827.4 kJ
What mass of galena is converted to lead oxide if 975 kJ of heat are liberated?
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