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Survival of trout needs water in which the oxygen concentration is greater than 5 ppm. A 100-mL sample of lake water was examined according to the method outlined in question 6 with the liberated iodine requiring a 9.72mL titration with 0.01235 M thiosulfate. Is the oxygen concentration adequate to warrant the stocking of trout in this lake?
Give the formulas of all new molecules or ions formed when solutions of the following are mixed. If there is no reaction write "N.R." (a) Cl-, Br- , I-, Fe3+ (b) Fe2+, Br2 water
Draw the structures of the Hg-containing compound(s) and the final alcohol product(s) formed in the following reaction sequence, omitting, by products. If applicable, draw hydrogen at a chirality center and indicate stereochemistry via wedge-and-d..
A sample of 45.0 mg a perfect gas fills a volume of 320.0 cm^3 at a pressure of 256Torr and at a temperature of 298 K. Determine the molar mass of such a gas based on the above data and assuming perfect gas behavior.
Calcium hydrogen phosphate is a component of plant fertilizers (a source of phosphate). It is a relatively insoluble hydrated ionic compound, CaHPO4·2H2O, with a Ksp of 2.7×10-7 at 25°C
Which of the following transitions in a hydrogen atom would emit the highest energy photon? a) n=1 to n=2 b) n=3 to n=2 c) n=5 to n=1 d) n=2 to n=8 e) n=6 to n=5
you have two perfectly insulated cups. one contains water and the other contains an equal volume of another liquid that
If 46.1 g Zn at 18 degrees celsius is placed in 80 g h20 at 75 degrees Celsius what is the final temperature of the mixture. The specific heat capacities of zinc and water are 0.388 J/ g*k and 4.184 J/g*K
For the character table for C2v, why are the symmetry operations (sigmav xz and sigmav yz) different between the Z translation and the Rz rotation. Maybe a picture or drawing would help.
If 31.0 mL of 34.0% hydrochloric acid solution (density = 1.17g/mL) is diluted with water to a volume of 1.50 L, what is the concentration of the diluted solution
The compound KB5O8·X H2O was analyzed and found to contain 24.6% of water. If the formula weight of this compound is 293.15 g/mol, what is the number of water molecules (X) in the formula?
Starting with solid sodium chloride, houw would you make one liter of 2.000 ppm sodium chloride solution
Balance each of the following neutralization reactions. Express your answer as a chemical equation. Identify all of the phases in answer.
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