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Unformatted text preview: UNIVERSITY OF CALIFORNIA, LOS ANGELES Civil and Environmental Engineering Department CEE 153 Introduction to Environmental Engineering Science Example Problems for Problem Set # 1 _____________________________________________________________________________ [Note: numerical answers are given in the brackets] 1. A 100 mL sample of water is found to contain 1 mg of dissolved arsenic. Express the concentration of arsenic as: a) mg/L [10 mg/L] b) ppm (mass of arsenic per mass of solution) [10 ppm] c) gram-moles/L (often denoted as M) [0.00013 M] 2 Suppose the average concentration of SO 2 in an air sample is measured to be 400 g/m 3 at 25 C and 1 atm pressure. Does this exceed the (24 hr) air quality standard of 0.14 ppm? [0.153 ppm exceeds standard] 3. A nitrogen analysis of a wastewater sample gives the following results: Ammonia 30.0 mg/L of NH 3 Nitrite 0.10 mg/L of NO 2- Nitrate 1.50 mg/L of NO 3- Organic nitrogen 15.0 mg/L of nitrogen Find the concentration (mg/L) of total nitrogen (N) in the sample.Find the concentration (mg/L) of total nitrogen (N) in the sample....
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This note was uploaded on 10/22/2011 for the course WASTEWATER 384 taught by Professor Stolzenbach during the Spring '11 term at UC Davis.
- Spring '11