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The balanced chemical equation for the reaction is:
2 Cu2S + 3 O2 -> 2 Cu2O + 2 SO2
From the equation, we can see that 2 moles of copper sulfide react to produce 2 moles of sulfur dioxide.
Therefore, when 10.0 mol of copper(I) sulfide reacts, 10.0 mol / 2 = 5.0 mol of sulfur dioxide will be formed.
Now, we can calculate the mass of sulfur dioxide formed using the molar mass of SO2:
Molar mass of SO2 = 32.07 g/mol + 2 * 15.999 g/mol = 64.07 g/mol
Mass of 5.0 mol of SO2 = 5.0 mol * 64.07 g/mol = 320.35 g
Therefore, when 10.0 mol of copper(I) sulfide reacts, 320.35 grams of sulfur dioxide will be formed.