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Hydrogen Cyanide (HCN) is a poisonous gas that is used in gas chambers for the execution of those sentenced to death. It can be formed by the following reaction:
H(aq)+ NaCN (s)? HCN (g) + Na (aq)

What volume of 4.00 M HCL is required to react with excess NaCN to produce enough HCN to fill a room 16x7x4 feet at a pressure of 850 mmHg and 65 F?

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