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The meconium (first stool) of newborns in an inner-city hospital is sometimes screened for the presence of drugs of abuse.
A standard addition curve was obtained for the analysis of a cocaine metabolite in a miconium sample in which the final volume was altered by the addition of each spike.
In a plot of [S]iVs/Vi versus [1.031]x+s,fVf/Vi, the slope and y-intercept were 1.031 mV/mM and 0.06 mV, respectively.
Calculate the concentration of the cocaine metabolite in the sample (2 s.f.) in mM.
anesthetic contains 64.9 % carbon, 13.5 % hydrogen, and 21.6 % oxygen by mass. At 120 degrees C and 750 mmHg, 1.00 L of the gaseous compound weighs 2.30 g.
An unkown metal crytallizes in one of the three cubic lattices.The edge length of the unit cell is 408pm.Given that the atomic radius of the metal is 144pm and the density of the solid is 19.3g/cm-3, what is the atomic symbol of the metal? a=2R a=..
Which of the following reagents could be used to separate the two anions in a solution of sodium sulfide and sodium acetate. Select all that apply.
Imagine gaseous Ar at 298 K confined to move in a two-dimensional plane of area 1.00 cm^2. What is the value of the translational partition function
A 25.0mL sample of HCl solution is titrated with a 0.139 M NaOH solution. The equivalence point is reached with 30.2 mL of base
What is the molar mass of an unknown dipotric acid if 65.0 mL of a 0.15 M solution of KOH was needed to reach the second equivilance point in the titration of 0.03 g of the acid.
one more question KOH(aq) + H3PO4(aq) For the equation given above, enter the total ionic equation and net ionic equation. only get 3 shots and already used two of them. something is missing.
health risk does each of the following classification represent Corrosive Carcinogen Teratogen Mutagen
How much heat in kilojoules is required to warm 10.0 g of ice, initially at -10.0^\circ C, to steam at 110^\circ C. The heat capacity of ice is 2.09 {\rm J}/{\rm g} ^\circ {\rm C} and that of steam is 1.84
Consider the following species: Ca, Br1-, Fe2+ , Cu+, Co3+. Li+. List the oxidizing agents. List the reducing agents. (Some could be both.) Which is the best oxidizing agent? Which is the best reducing agent
Which of the following ionic compounds will be more soluble in acid solution than in water? Explain your choice/s Determine whether the anions are basic and use Le Chatelier's principle.
Perform a degree of freedom analysis and show that all of the unknowns can be solved.
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