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Mercury (Hg) is a toxic heavy metal. Typically the "free metal ion", Hg2+, is considered the most toxic form. For a natural water with a pH = 7.8 and containing 0.5 mg Hg/L of total soluble Hg(II) and 50 mg Cl/L of total soluble chloride (Cl-) species, calculate the concentration of all soluble Hg(II) species. Which Hg(II) species is most prevalent? Assume there are no solids present, that the major ligands present are Cl- and OH-, and ignore activity corrections. If you make assumptions to solve this problem, clearly state them and be sure to check them.
If 3.30ml of vinegar needs 45.0ml of 0.130M NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.10qt sample of this vinegar?
How are the opposing pathways of glycolysis and gluconeogenesis prevented from extensive futile cycling? a) The catabolic and anabolic pathways do not take place in the same part of the cell
Understanding of chemistry basics - which of the following is not changed by the activity of an enzyme during a chemical reaction?
Determine the % relative error for the following quantities: if there is no uncertainty given for a specific value, assume an absolute error of "1" in the last digit.
Pyridine is a heterocyclic aromatic compound similar in structure to benzene. It is widely used as an organic base because it reacts with acids, but is inert to most reagents.Write an equation with structural formulas to show how pyridine reacts w..
calculate the mass of Cl2 consumed if the battery delivers a constant current of 853 A for 28.0 min.
how much heat is required to raise the temperature of 789 g of acetic acid from 25 degrees celsius to 82.7 degrees celsius? Specific heat = 2.05 J/gdegreeCelsius
A gas bottle contains .65 mol of gas at 730 Hg pressure. If the final pressure is 1.15 atm, how many moles of gas were added to the bottle?
Determine the equilibrium concentrations - what are the new equilibrium concentrations of all species.
How many liters of hydrogen gas are collected over water at 18 degrees Celsius and 725 mmHg when 0.84 g of lithium reacts with water?
H2C2O4(aq), Ka1 = 6.5 x 10-2 and Ka2 = 6.1 x 10-5. Don't forget that Kw = 1 x 10-14. Then Determine K for the reaction
A gasous mixture of O2 and Kr has a density of 1.104 grams per liter at 435 torr and 300 K. What's the mole percent of O2 in the mixture?
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