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A mixture containing 18.8uM of the analyte of interest and 44.4uM of the internal standard produced chromatographic peak areas of 306 for the analyte and 511 for the standard. A second solution containing an unknown quantity of the analyte as well as 55.5 uM of the internal standard produced peak areas of 251 for the analyte and 563 for the internal standard.
Explain what is the concentration of the analyte in the second solution expressed as uM?
Copper (II) Iodate precipitates from iodate solution. The formula of the precipitate is Cu(IO3)2. A saturated solution of this substance was made in 0.01 M KlO3. The copper concentration was found to be 0.0012M
Compute the pH of a solution made by mixing 67 grams of sodium acetate, NaCH 3 COO, to 37 g of acetic acid, CH 3 COOH, and dissolving in H 2 O to form 300. mL of solution ?
a water solution containing 2.00 g of an unknown molecular substance dissolved in 10.00 g of water has a freezing point
A strong line in the spectrum of atomic mercury has a wavelength of 254 nm. While mercury emits a photon of light at this wavelength, the frequency of this light is
Naturally occuring chlorine has two isotopes, Cl-35, which has an atomic mass of 34.969 amu and Cl-37. If the average atomic mass of chlorine is 35.46 amu and its natural abundance is 75.53%,
The vapor pressure of water is 0.196 atm at 60 C. What is the equilibrium constant for the transformation H2O (l)--><--H2O (g)
A patient needs 2.80×10-2 of a sulfa drug. There are 8.00 tablets in stock. How many tablets should be given?
What are some methods done by latent fingerprints. What are some advantages and disadvantages to latent fingerprints?
A 12-gram mixture of methane, CH4, and ethane, C2H6, is completely combusted in oxygen. If the total mass of H2O produced is 23.4 grams, what was the approximate mass of the methane in the original mixture
The E2 reaction of most compounds is known to proceed preferentially by removal of a proton ant-periplanar to the leaving group. based upon this generalalization, predict the geometry of the 1-bromo-1,2-diphenylethylene
H2S and H2O have simipar structures and their central atoms belong to the same group. Yet H2S is a gas at room temperature and H2O is a liquid. Use bonding principles to explain why.
As water is warmed, the solubility of sugar crystals in it *increases *decreases *remains constant *Fluctuates randomly
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