# 5 chemistry q/a

May 5th, 2015
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Assignment Details There are five questions/problems on this assignment. Attempt ALL problems Please show your working so that any errors can be tracked as part of your feedback. 1. Thiazole (C3H3NS) occurs natrually as part of vitamin B1 (thiamin) such as in pasta and bread. Thiazoles have anti-tumor and anti-viral properties but most thiazole compounds are flavourings. If it is combusted perfectly in air the products are carbon dioxide, water, hydrogen sulphide (H2S) and nitrogen. What is the balanced reaction? [8 marks] What is the RMM of thiazole? [2 marks] What is the fuel-air mass ratio? [5 marks] What is the oxygen depletion? [4 marks] What is the yield of CO2? [2 marks] What is the yield of H2O? [2 marks] What is the yield of N2? [1 mark] For ideal combustion, what is the yield of carbon-monoxide? [1 mark] You may assume the composition of air is 21% O2 and 79 % N2. A periodic table is provided overleaf, should you need one.

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Name CourseDate 11. What is the balanced reaction? Solution: we have 20C3H3NS +60O2=60CO2+ H2O+20H2S +10N22. What is the RMM of thiazole ? Solution: we have RMM= (12*3)+(3*1)+(14)+(32)= 853. What is the fuel-air mass ratio? Solution: We have Fuel-air ratio= 20/60= 0.33334. What is the oxygen depletion? Solution: Assume mass of oxygen= 21g Moles= 21/16= 1.3125moles Depletion rate= 60*1.3125= 78.75 Moles/sec5. What is the yield of CO2? Solution:We have 85g of thiazole gives 44g theoretically 37.19gproduces mass of CO2= 37.19*44/85= 19.25g which is the yield of CO26. What is the yield of H2O? Solution: We have85g = 18g 37.19= ? Yield of water= 37.19*18/85= 7.86g7. What is the yield of N2? Solution: We haveYield of nitrogen= 37.19*32/85= 14 g8. For ideal combustion, what is the yield of carbon-monoxide? Solution: We have Yield of CO= 37.19*28.01/85= 12.26g2When we begin chipping away at blaze it is critical to choose the smolder significance on the grounds that it is discriminating. Things to consider are temperature, framework, compass of contact, circulation system to skin, and anatomic territory. Epidermal significance varies with body surface, which can offer varying degrees of warm protection. More settled adults and young children similarly have more slim skin (Clarke J. Blazes, 1999, 55). Superficial burns It has follow

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