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The OTC antihistamine chlorpheniramine maleate is a cationic acid (positive charged) with an unionized conjugate base and a pKa of 9.4. Calculate the ratio of ionized to unionized drug forms that would exist in the plasma at physiological pH (7.4). What is the percent ionized to unionized
After the reaction has reached equilibrium, the absorbance of the product C is measured and its concentration is determined to be 0.00745 M. Calculate the equilibrium constant for this reaction.
A zero-order reaction has a constant rate of 1.50×10?4. If after 55.0 seconds the concentration has dropped to 4.50×10?2, what was the initial concentration?
If the pressure exerted by ozone in the stratosphere is 3 x 10^-3 and the temperature is 247 , how many ozone molecules are in a liter?
sodium chloride dissolved in 225 g of water has a density of 1.98g/ml. Calculate the molarity of sodium chloride.
What is the mole fraction of ethanol, CH3CH2OH, in an aqueous solution that is 20.0% ethanol by mass? 0.150
The density of hydrogen gas in a flask is 0.147 g/L at 305 K. what is the pressure inside the flask? Calculate the density in G/L of CH4(g) at 75 Celsius and 2.1 atm (R= .08206 L*atm/mol*K).
We have a nuts, bolts, and indirect measurement lab coming up. We'll get a bag of nuts/bolts and I need 2-3 methods on estimating the mass of a bolt without opening the bag. Thanks.
A benzylic carbocation is generated under the conditions of part A. would the presence of a para CH3O- group on the benzene ring
Write a balanced net ionic equation for the neutralization reaction and Tartaric acid,( C4H6O6) , has two acidic hydrogens.
A gas-filled balloon having a volume of 6.00 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23°C and 3.00 10-3 atm, respectively. Calculate the final v..
A 20.0-mL sample of 0.25 M HNO3 is titrated with 0.15 M Na OH. What is the pH of the solution after 30.0 mL of NaOH have been added to the acid?
A reaction has an activation energy of 40 kJ/mol. What happens to the rate if you increase the temperature from 70 C to 80 C? Does the rate increase by
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