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CEE 2300_assignment 1_ solution

# CEE 2300_assignment 1_ solution - CEE 2300 Fall 2007...

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CEE 2300, Fall 2007 Assignment 1: Solution Problem 1 The tragedy of the commons is the situation that arises when a commonly shared resource (e.g. soil, water, air) is collectively degraded by individuals, impacting the entire community. It generally occurs due to the fact the individuals make decisions based on minimizing the impact on themselves without considering the collective impact of their actions on the community. An example of this would be acid rain. Through the 1970’s and 1980’s companies found it cheaper to emit SO 2 and NO 2 than to remove it from their stacks. The cost of the emissions was collectively shared by many of the citizens within the US in the form of many acidified lakes and streams in the US (impacting tourism), decreases in crop production in some locations, and human health impacts. The tragedy of the commons can be avoided primarily by government legislation, or in a broader sense an entity that oversees an entire community. Problem 2 The primary energy sources in the world are coal, natural gas, and oil. Problem 3 (2-3) Calculate the atomic weight of boron Given: Isotopic mass and fractional abundance Solution: a. Atomic weight is the sum of products of isotopic mass and fractional abundance (10.013)(0.1978) + (11.009)(0.8022) = 10.812 atomic mass units Problem 4 (2-8) Concentration of iron Given: 2.4 g ferric phosphate, 1.0 L of water, ionic strength = 0 and 0.5 M, assuming temperature is 25º C. Solution:

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CEE 2300_assignment 1_ solution - CEE 2300 Fall 2007...

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