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In the spring time, a background ozone level of 29.0 ppbv was measured in Edmonton. Convert the mixing ratio of 29.0 ppbv ozone to units of molecules cm-3. Assume a pressure of 1.108 atm and a temperature of 12.5 ºC.
A urine sample was found to have a pH of 5.34. Define what would be the ratio of the unprotonated form A- to the protonated form, HA, for uric acid in this urine sample
Determine the number of cells per milliliter of the original culture when the total number of colonies and the total number dilutions are as follows
A 2.5-L sample of a 6.3M NACl solution is diluted to 75L.What is the molarity of the diluted solution?
in a saturated solution of mgf2 at 18c the concentration of mg2 is 1.21 x 10-3 molar. the equilibrium is represented
A 100.0ml of sample of drinking water was buffered at PH 10.0 and after the addition of Calmagite indicator, required 35.41ml of 4.652X10^-3 m EDTA to reach the end point for the titration. Calculate the total hardness of the water in ppm of CaCO3
Glycine can be obtained in three forms (differing in charge and conjugate ions): (a) glycine hydrochloride, (b) isoelectric glycine (sometimes called glycine, free base), and (c) sodium glycinate. Draw the structures of these three forms.
Many household cleaning products contain oxalic acid, H2X2O4 , a diprotic acid with the following dissociation constants: , . Calculate the equilibrium concentration of C2O4^2- in a 0.20M solution of oxalic acid.
Lucite is 71.4% carbon, 9.59% hydrogen, and 19.01% oxygen. What is the empirical formula for Lucite?
Assume a solution of acetic acid (pKa 4.7) has been partially neutralized with a base to a pH of 6.0. Determine the percent of acid present.
If a sample of dry nitrogen occupies 447mL at STP. Define what would its volume be if it were collected over water at 26 degrees Celsius and 750torr
A compound has an empirical formula of CH2Br and vapor density of 6.00 g/L at 375K and .983 atm. Determine molar mass of compound
The generic metal hydroxide M(OH)2 has Ksp = 3.85×10-18. What is the solubility of M(OH)2 in pure water
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