Solved: Chlorine gas preparation, How much MnO2 should be added to excess HCl to obtain 275mL of, Chemistry

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Chlorine gas preparation

Assignment:

Chlorine gas can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid:
MnO2(s) + 4HCl(aq) --> MnCl2(aq) + 2H2O(l) + Cl2(g)

How much MnO2 should be added to excess HCl to obtain 275mL of chlorine gas at 5.0C and 650 mmHg?

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