Hydrogen Cyanide Poisoning
Hydrogen cyanide, HCN, is a poisonous gas. The lethal dose is approximately 300. mg HCN per kilogram of air when inhaled. The density of air at26 ∘C is 0.00118 g/cm3.
Calculate the amount of HCN that gives the lethal dose in a small laboratory room measuring 12.0 ft×15.0 ft×8.50ft.
Consider the formation of HCN by the reaction of NaCN(sodium cyanide) with an acid such as H2SO4 (sulfuric acid):
2NaCN(s)+H2SO4(aq)→Na2SO4(aq)+2HCN(g)
What mass of NaCN gives the lethal dose in the room?
HCN forms when synthetic fibers containing Orlon® or Acrilan®burn. Acrilan® has an empirical formula of CH2CHCN, so HCN is 50.9% of the formula by mass. A rug in the laboratory measures 12.0× 15.0ft and contains 30.0 oz of Acrilan® fibers per square yard of carpet. If the rug burns, what mass of HCNwill be generated in the room? Assume that the yield of HCNfrom the fibers is 20.0% and that the carpet is 37.0% consumed.
Posted on October 2, 2013, in Question and tagged Chemistry, density, density of air, Hydrogen cyanide, Hydrogen Cyanide Poisoning, lethal dose, question, science, sodium cyanide, synthetic fibers, The density of air at 26 ∘C is 0.00118 g/cm3.. Bookmark the permalink. 4 Comments.
Rant4u 
1.) 15.3 g
2.) 27.8 g
3.) 641 g
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These answers are incorrect. The correct answers are: 1.)15.7g and 2.)28.5g and 3.)526g
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The answers above are incorrect. The correct answers are: 1.)15.7g and 2.)28.5g and 3.)526g. I wanted the next person to have the correct answers. Thanks!
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No, Tommy and Anonymous are in correct in the first two answers. Rant4u actually has the first 2 answers correct! The 3 commentors are incorrect at the last question.
1.) 15.33 g (Not 15.7)
2.) 27.8 g (Not 28.5)
3.) 624 g
These are correct because I got them correct on my MasteringChemistry assignment.
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