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What is the minimum amount of succimer that must beinjected to bind all the lead in a patients bloodstream? Assume that one male of succimer binds with one mole of lead. Assume that patients have 5.
If you were to construct a galvanic cell for the purposes of studying this reaction, what is the standard cell potential(E°) that you would measure?
A hard water solution contains 48.0g calcium chloride. How much sodium phosphate in grams should be added to the solution to completely precipitate out all of the calcium?
You take a 30 ml sample of pond water and test it with yoursampling kit. You find that the water contains 20 ppm ofphosphates. You weight the sample and find that its mass is31 g. What is the mass o
A chemist wanted to mixed 6.0 mL of solution A (d=0.82 g/mL) with solution B (d=0.94) so that the final density of the solution was 0.88 g/ml.
The density of an antifreeze solution measured 1.12g/mL. The solution was a mixture of 30% water and 70% antifreeze compound. How many g of antifreeze compound are necessary to prepare 50.0mL of ant
A gas is stores in a spherical tank (v=1.33 pie r^3 cubed) having a diameter of 10.0 ft. An unknown gas is contained in the tank with a density of 0.74 g/L.
Ethyl acetoacetate will be reacting with trans-chalcone with 25 mLethanol and a pellet of NaOH under reflux for an hour. Then it willbe crystallized with water and chilled on an ice bath for 30minut
The energy from electromagnetic radiation can used to cause the rupture of chemical bond. A minium energy of 209 kj/mole is required to break the nitrogen-phosphorous single bond.
The rate law for a reaction, 2A + B --arrow-- C, is rate = k[A][B]. What is the effect on the rate if the concentration of A is held constant while the concentration of B is doubled?
A current 1.00 g sample of carbon shows 921 disintegrations perhour. If 1.00 g of charcoal from an archeological dig in alimestone cave in Slovenia shows5.50 x 103 disintegrations in 25.2 h, wh
For a given sample of CH3OH, the enthalpychange on reaction is 25.8 kJ. How many grams of hydrogen gases are produced?
How many a) atoms of oxygen b) formula units of the compound, andc) moles of water molecules are in 4.8 g of epsom salt (Magnesiumsulfate heptahydrate)?
Calculate the fraction of the principal species in the solution by mixing 0.1M leucine and 0.1M NaOH, and the pH of that solution.
A mixture of 60 mol% n-propylcyclohexane and 40 mol%n-propylbenzene is distilled through a simple distillation apparatus; assume that no fractionation occurs durng the distillation.
A solution of 1.00 g of a protein in 20.0 ml of water has an osmotic pressure of 35.2 torr at 298 K. Calculate the molar mass of the protein.
What is the molarity of a solution of NaOH if 38.6 mL of the solution are titrated by 1.00 g of oxalic acid dihydrate?
A calorimeter contained 75.0 g water at 16.95 degrees C. A 93.3 g sample of iron at 65.58 degrees C was placed in it, giving it a final temperature of 19.68 degrees C for the system.
The structure of O-aminobenzoic acid can be determined by titration with 0.2M sodium hydroxide. How many mL of base would be needed to neutralize 0.5 g of starting material?
Hydroxylation of cis-2-butene with OsO4 yields 2,3 butanediol. What stereo chemistry do you expect for the product? Explain in detail why this is the answer.
Suppose that in starting a car on a cold morning a current of 125 amperes is drawn for 15.0 seconds from a cell of the type described above.
A 2.50 gram sample of an unknown base is dissolved in water and titrated with 0.220 M HCl to the equivalence point. It takes 36.44 mL of acid to complete this titration.
If the amine is valuable then slightly more than 1equivalent of a 3 degree (tertiary) amine, such as triethylamine orpyridine is added.
When an acid chloride or acid anhydride is used to preparean amide two equivalents of amide are required. Write reactions that can explain this.
What is the correct equillibrium constant expression for the following reaction? Fe2O3 (s) + 3H2(g) in equillibrium 2Fe (s)+3H2O(g)