Question: 1. Environmental engineering basics (4 points; 1 each) Provide a brief, accurate response to each of the following problems or questions. Your responses should demonstrate

1. Environmental engineering basics (4 points; 1 each) Provide a brief,

1. Environmental engineering basics (4 points; 1 each) Provide a brief, accurate response to each of the following problems or questions. Your responses should demonstrate your clear understanding of key concepts. (a) Consider a parcel of air that has a fixed temperature, T, and pressure, P, and composition. The temperature increases. Does the air density increase, decrease, or stay the same? Explain. (b) Tetrachloroethylene (C2Cl4,MW=166g/mol), also known as PE, is an organic solvent usec for dry cleaning clothes. It is regulated in the US as a drinking water contaminant. The drinking water standard is 0.005mg/L. What is the corresponding level of PCE in water, expressed in units of ppb ? (c) What is transferred from one species to another in a redox reaction? (d) A cloud droplet in the unpolluted atmosphere has pH=5.6. Why isn't the pH equal to 7

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