a. Describe alpha particles, beta particles, and gamma rays. Include a discussion of how far they travel and what stops them.
b. If 200 grams of salt is dissolved in 8000 grams of water, what is the salt concentration in percent? Show your work.
c. Why is dissolved oxygen an important water quality parameter? Are higher or lower values better for water quality? What is the saturation concentration (mg/L) of dissolved oxygen in freshwater at 20oC?