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

question 72

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.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 NOT true. 2 Cu₂S(s) + 3 O₂(g) $\to$ 2 Cu₂O(s) + 2 SO₂(g)
Cu₂O(s) + C(s) $\to$ 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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Definitions:

Midpoint Formula

A method used in economics to calculate the elasticity of demand or supply between two points on a curve by averaging the quantities and prices.

Price Elasticity

A parameter that quantifies the change in demand for a commodity in response to its price alterations.

Midpoint Formula

A mathematical method used to find the midpoint or average between two points, often used in economics to calculate price or quantity averages.

Price Inelastic

Describes a situation where the demand for a product does not change significantly with a change in its price.