What Mass of Solid CaO Is Needed to Remove the Sulfur

question 23

Multiple Choice

What mass of solid CaO is needed to remove the sulfur dioxide from 1.0 * 10⁶ m³ of air having an SO₂ concentration of 1.5 * 10^-9 M Assume that the reaction leading to removal of the sulfur dioxide is CaO(s) + SO₂(g) $\rarr$ CaCO₃(s) .

• A) 56 g
• B) 96 g
• C) 37 g
• D) 84 g
• E) 43 g

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