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A wildlife biologist is interested in testing the pH of the water in a lake. He obtains a 200mL sample of the water and titrates this sample with a 0.050 M NaOH solution. Neutralization of the lake water needs 40mL of the NaOH solution. If the size of the lake can be described as 1.1 km long by 2.3 km wide and has a depth of10m, approximate how many moles of acid are present in the lake water.
a) 10^8 molesb) 2.5 x 10^5 molesc) 2 x 10^-8 molesd) 2.5 x 10 ^-8 molese) 10
paradichlorobenzene c6h4cl2 is a component of mothballs. a solution of 2.00 g in 22.5 g of cyclohexane boils at 82.39
2Na + 2H2O ----> 2NaOH + H2 . If 7.2g of Na undergoes reaction with water and the resulting hydrogen is bruned in oxygen to produce water, how many grams of water would be produced
What observed rotation is expected when 1.58M solution of (R)-2-butanol is mixed with an equal volume of a 0.790 M solution of racemic 2-butanol, and the resulting solution is analyzed in a sampling container that is 1 dm long
Write a net ionic equation for the reaction that occurs when excess hydriodic acid (aq) and iron(II) sulfide (s) are combined.
William places 20 mL of a 2.6 M sulfuric acid solution into a small flask with a few drops of phenolphthalein indicator. He fills a buette with and 1M NaOH. How many mL of the NaOH solution will he use when the solution in the flask just turns pin..
A 49 lb child is suuposed to receive 93 units/kg of heparin sodium by IV infusion every 4 hours. How many units will the child receive over the course of one day (round to the nearest unit).
Given that the partial pressure is 7.0x10^-4 atm, what is the pH of water at equilibrium with the atmosphere
Use the particle-in-a-one-dimensional-box model to calculate the longest-wavelength peak in the electronic absorption spectrum
All of the sulfate ion is in the precipated as barium sulfate. the mass of Barium Sulfate 0.5032g . What is the average mass of saccharin per tablet ? What is the % mass of saccharin per tablet?
the partial pressure of o2 in air at sea level is 0.21 atm. using henrys law calculate the molar concentration of o2 in
Express the concentration of .0220M aqueous solution of Fluoride, in mass percentage and parts per million. Assume the density of of the solution is 1.0g/mL
How much work is done when a 185g tomato is lifted 15.0m. 39.6J The tomato is dropped. What is the velocity, v, of the tomato when it hits the ground. Assume 91.9 % of the work done in Part A is transferred to kinetic energy, E, by the time the to..
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