Question- 1. Rainwater collected contains Pb, Cu and Zn at 8.5, 5.0 and 7.5 micro ¬g/L. Determine these concentrations in units of mol/L (or nmol/L).
2. The concentration of ozone (O3) on a warm summer day (T = 33 °C, P = 1 atm) is 110 ppbv. What is the concentration in (a) mg/m3and (b) moles of O3per 106moles of air?
3. The mass of toluene (C7H8) in a 1 kg subsurface soil sample collected after an underground storage tank was removed was measured to be 5.5 mg. What is the concentration of toluene in the soil in (a) ppmmand (b) ppbm?
Please be very comprehensive in your answer and do not omit any steps