Stoichometry/chemistry help?!?!?

Fritz Haber invented a poison gas in WWI to kill soldiers. The chlorine gas (Cl2) would react with the water (H2O) in the soldiers lungs to produce hydrochloric acid (HCl) and oxygen gas (O2). If 10.0g of hydrochloric acid is enough to kill someone, how much chlorine gas would this require?
Asked Jun 03, 2014

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