Extracting Copper from Sulfide Ores Can Be Performed by Roasting $\rightarrow$

question 74

Multiple Choice

Extracting copper from sulfide ores can be performed by roasting the ore in oxygen, with a subsequent reaction of copper(I) oxide with carbon.Simplified chemical equations for these steps are shown below.Mathematically combine the two reactions to create an overall balanced equation that contains CU(s) as the only form of copper as a product.Eliminate like terms from your final equation and use the lowest whole-number coefficients possible.Select the statement regarding the overall balanced reaction that is FALSE.
2 Cu₂ S(s) +3O₂ (g) $\rightarrow$ 2 Cu₂ O(s) + 2 SO₂ (g)
Cu₂ O(s) + C(s) $\rightarrow$ 2 Cu(s) + CO(g)

• A)The balanced reaction requires three moles of oxygen gas.
• B)Two moles of copper result when two moles of carbon react.
• C)Cu₂O does not appear in the final balanced equation.
• D)Two moles of CO gas are produced in the overall balanced equation.
• E)There are three reactants and three products in the overall balanced equation.

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