Respuesta :

Na₂CO₃ + 2HCl → 2NaCl + CO₂ + H₂O

1 mol Na₂CO₃ - 1 mol CO₂

0.2 mol Na₂CO₃ - x mol CO₂

x=0.2*1/1=0.2 mol
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译文
Yes, I totally agree that the answer should be 0.2mol.
Besides，if it's not excess hydrochloric acid，the answer will be 0.2 mol，too.

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