Environmental Science Exam Answer the following questions i 9. A. Would any of t
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Environmental Science Exam Answer the following questions i 9. A. Would any of the organisms illustrated in the food web on the firs the space provided. Envi a definition o or why Stud be deromposer in your answer 12. B. What role do decomposers play in the oxygen-carbon dioxide cycle? accom posha corsan into inorgnic carn. The de h plat ord gioral goups) resulls in the coves resuts in the coveion o Hakin by p inlocatoraaide.nch'in erino#x dirahpire. exam to create a 10. A. In the space below, use the food web illustrated on the first page of thee marine food chain showing three trophic levels B. If the chain were extended to land, name an organism from the food web on the firs page of the exam that would be at the fourth trophic level. Snah - Carnivorc 11. Below is the equation for the chemical reaction used to power rocket engines 2H, +0, 2H,0 (g) + heat NOTE: The g after H,0 indicates that the water is in a gascous state. Is this an oxidation reaction? Why or why not? 178 (more)Explanation / Answer
11) It is not an oxidation reaction beacause in this equation oxidation -reduction reaction / redox reaction is taking place. In redox reaction,there is transfer of electrons between to two speciesor where oxidation and reduction is taking place side by side. In the given reaction
2H2 + O2 = 2H2O + HEAT,
H2 , its oxidation state is changing from 0 to +1 which means lossing , hence an oxidation but O2 is in reduction process because,it is changing its oxdising state from 0 to -2 which means gaining electrons. Prior to this increase and decrease of oxidation number or lose or gain of electrons , it is a redox reaction.
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