Sample Exercise #2

• What is the concentration in ppb of selenium if 1.3 mg is found in 2500. kg of soil?
• The EPA requires cyanide levels to be less than 0.20 ppm. What mass of cyanide would this be in a 65 kg person?
• What is the concentration, in ppm, if 0.808 grams of CaCl2 is dissolved in 250.0 ml of water.
• What mass of nickel is in a 2.4 kg sample of propanol if the concentration is 20 ppb?