C. 0.5 mol
From the balanced chemical equation, we can see that the mole ratio between Na2SO4 and BaSO4 is 1:1. Therefore, if 0.5 moles of Na2SO4 react, then 0.5 moles of BaSO4 will be formed.
How many moles of BaSO4 are formed if 0.5 moles of Na2SO4 react with excess BaCl2?
Na2SO4 + BaCl2 → BaSO4 + 2NaCl
A. 0.144 mol
B. 0.75 mol
C. 0.5 mol
D. 0.25 mol
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