HCN forms when synthetic fibers containing Orlon ® or Acrilan ® burn. Acrilan ®

Question

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× 15.0 ft 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 HCN from the fibers is 20.0% and that the carpet is 38.0 % consumed.

Express your answer to three significant figures and include the appropriate units.

Explanation / Answer

ans)

Here A rug in the laboratory measures 12.0× 15.0 ft and contains 30.0 oz of Acrilan® fibers per square yard of carpet.

Given yield of HCN from the fibers is 20% &carpet is 38%

12 x 15 = 180 sq ft this is 20 sq yard

if 30 Oz of Acrilan is present /sq yard in 20 sq yard we have 30 x 20 = 600 Oz of Acrilan this is 17009 g of Acrilan

50.9% of this is HCN so HCN is 17009 x 0.509 = 8657.6 g mass

As the carpet burns 38 % is consumed and yield of HCN from the burnt fiber is 20% SO actual HCN produced is

8657.6 x 0.38 x 0.20 = 658 g of HCN is generated in the room

The answer is 658 g HCN

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