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An industrial plant emits SO2 into the atmosphere on a steady basis. Rainfall records indicate that the annual precipitation is 75 cm/year, at a pH of 4.4. A nearby lake has the following characteristics: surface area = 8 km2, average depth = 10 m, pH = 5.8, alkalinity = 25 mg/L as CaCO3. The area from which runoff drains directly to the lake is 25 km2. Assume that only 20% of the rain falling on the land reaches the lake. Assume also that on a yearly basis the lake is completely mixed, and that the small river flowing into and out of the lake can be neglected as far as acidification is concerned. How many years will it be before the lake will reach a pH of 5.0?
A 1.20 M solution of citric acid (H3C6H5O7) in water has a density of 1.10 g/cm3. Calculate the normality. Citric acid has three acidic protons.
The mole fraction of potassium nitrate in an aqueous solution is .0194. The density of the the solution is 1.0627 g/mL. Calculate the molarity of the solution.
calculate the heat released when 176g of water at 23.0 degrees celsius are converted to ice at -10.0 degrees celsius?
A gas sample containing 1.65 mol at 25°C exerts a pressure of 413 torr. Some gas is added to the same container, and the temperature is increased to 50.°C.
A 97 gram solution of silver nitrate contains 10 grams of AgNO3. What is the percent by mass of silver nitrate in this solution
Why must you avoid using your hands in handling the magnesium ribbon and the crucible and cover? 2.Why must objects be cooled to room temperature before taking their weights(masses)
How many moles of NaF must be added to 100.00mL of 0.15 M HF to prepare a buffer with pH=3.30. Ka(HF)=7.1*10^-4
A proton in a linear accelerator has a de Broglie wavelength of 144 rm pm. what is the speed of the proton?
An electrophilic addition is? Answer . a) An addition to an alkene initiated by a nucleophilic attack. b) An addition to an alkene initiated by an electrophilic attack
When maleic acid is heated to about 100C it forms maleic anhydride.however fumaric acid requires a much higher temperature
Calculate the freezing point and boiling point of a solution of 383 g of glucose dissolved in 400 g of water
A beaker with 1.70×102 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.20 mL of a 0.490 it M HCl solution to the beaker. How much wi..
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