problem involving the consumption of dissolved oxygen in water by sugar

A large pond is 300m by 95m with an average depth of 2.5m. Assuming that the pond is saturated with oxygen, calculate the amount of sugar (C12H22O11) in kg that would be sufficient to completely consume the dissolved oxygen.

Determining pecent contribution to alkalinity from a solution

For a solution having .0025 equivalents/liter total alkalinity (contributions from HCO3- (negative one charge), CO3-- (negative two charge) and OH- (hydroxide)) at [H+] = 4.69E-11, what is the percentage contribution to alkalinity from CO3-- (negative two charge)? A hint was given: Calculate the bicarbonate concentration and the contribution of the bicarbonate to the total alkalinity. *** I have worked this problem several times trying several different approaches, so can you PLEASE work the problem out for me to understand how you derived the solution. Thanks.

Mass of Carbon burned to increase the average carbon dioxide level

Taking the mass of the atmosphere to be 4.5E15 metric tons, what mass of carbon must be burned in order to increase the average carbon dioxide level in the atmosphere by 0.5 ppm by volume (in metric tons)? The only Hint given was: The average molar mass of air is 28.96 g/mol. Can you please work this problem out for ease of understanding. Thanks.

Problem with Henry's constants and partial pressures

Consider the following aqueous route to oxidize SO2: SO2(aq) + H2O2(aq) -> H2SO4(aq) k = 1.1 X 10^3 L/mols a. The partial pressure and Henry's law constants for SO2 and H2O2 are 2.1 ppm (KH = 1.2 mol L-1atm-1) and 4.8 ppb (KH = 1.0E5 mol L-1atm-1), respectively. Calculate the reaction rate of this process. b. Calculate the reaction rate (per liter of air) if the amount of liquid water in the atmosphere is 0.02 g L-1. Hint: Convert ppm and ppb to partial preferences, calc rate. Please give a specific answer, and show me how to work it out. Thanks!

Stokes Law and particle sedimentation

Stokes' Law describing partial sedimentation is given by: Rate = [(gd^2)(Δρ)]/18η where g = 9.81 m s^-2 is gravitational acceleration. Δρ is the density difference between particles and the air, air viscosity of η = 1.36E-4 g cm^-1 s^-1 and d is the particle diameter in centimeters. a. Calculate the weight of one cubic centimeter of air at 1.0 atm and 15 degrees celsius. b. Assume particles have a density of 2.40 g cm^-3 and are being released by a 100 m smokestack. How long does it take a 25μm particle to settle to the ground? c. It rains exactly once a week. What is the smallest particle size (μm) that can settle to the grounds before wet... click for more