Assignment:
Question 1. Explain, using appropriate equations, why combustion of fuels containing a sulphur leads to production of acid rain.
Question 2. A solution contains 5.55x10-5 grams of Pb2+ ions in 3.50 litres. What is the Pb2+ ion concentration in parts per million (ppm)?
Question 3. If you initially have 254 grams of a radioactive isotope, how many grams remain after four half lives?
Question 4. Why can it be said that ozone in the stratosphere is beneficial, but ozone at the earth's surface is harmful ?
Question 5. A natural body of water has an O2 content of 8.00 milligrams per litre. How many litres of it are needed to decompose the organic matter in 1.00 litre of wastewater with a biological oxygen demand (BOD) of 137 mg per litre?
Your answer must be typed, double-spaced, Times New Roman font (size 12), one-inch margins on all sides, APA format.