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Hydrogen cyanide gas (HCN, 27.03g/mol) is extremely toxic. Levels around 3.2mg/L can kill a person in...

Hydrogen cyanide gas (HCN, 27.03g/mol) is extremely toxic. Levels around 3.2mg/L can kill a person in about one minute. Suppose a reaction generates 0.0158atm of HCN gas at 5.00 degrees Celsius in a 16.0L fume hood. How many milligrams per liter of HCN is this?

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Expert Solution

pressure = 0.0158 atm

volume = 16.0 L

temperature = 5.00 oC = 278 K

P V = n R T

0.0158 x 16 = n x 0.0821 x 278

n = 0.01108

moles of HCN = 0.01108

mass of HCN = 0.299 g = 299 mg

concentration of HCN = 299 / 16 = 18.7 mg / L

concentration of HCN = 18.7 mg / L

queen_honey_blossom answered 2 years ago
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