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Hydrogen cyanide is a poisonous gas. The lethal dose is approximately 3.0 x 102 mg HCN per kilogram of air when inhaled.
(a) Calculate the amount of HCN that gives the lethal dose in a small laboratory room measuring 12 x 15 x 8.0 ft. The density of air is 0.00118 g/cm3. (b) If the HCN is formed by reaction of NaCN with an acid such as H2SO4, what mass of NaCN gives the lethal dose in the room?
2 NaCN (s) + H2SO4 (aq) → Na2SO4 (aq) + 2 HCN (g)
Sagot :
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