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Write the Henderson-Hasselbalch equation for a solution of propanoic acid (CH3CH2CO2H, pKa = 4.874 ) using HA and A- in the expression. Using this equation, calculate the quotient [A-]/[HA] at A) pH 4.56 B) pH 4.874 C) pH 5.40.
Calculate the vapor pressure of the solution at 25oC when 12.43 grams of testosterone, C19H28O2 (288.4 g/mol), are dissolved in 246.7 grams of diethyl ether.
On a quantitatively labeled number line, draw where the radial nodes of the 1s, 2s, and 3s hydrogen wavefunctions sit.
How many grams of magnesium chloride must be dissolved in 568 g of water to give a solution that freezes at -2.38°C
Initial concentration of CH3NC is 0.0340M. How many minutes does it take for the CH3NC concentration to drop to 0.0300M?
Many gases are shipped in high-pressure containers. Consider a steel tank whose volume is 65.0 {\rm L} and which contains {\rm O_2} gas at a pressure of 16500 {\rm kPa} at 23^\circ C.
If 30.0 L of oxygen gas is cooled from 473 K to 274 K at constant pressure, what is the new volume of oxygen
Solid phosphorus pentabromide, PBr5, has been shown to have the ionic structure [PBr4+][Br? ]. Write the electron-dot formula of the PBr4+ cation
Diamond is the hardest known substance. Fe metal is soft sunstance. Using your knowledge of bonding, explain why diamond is hard
a) Using the value Ecell = 0.68V, calculate the [Ag+] in the test solution after equilibrium is reached. b). Setup a reaction table for equation above and calculate the formation constant for Ag(S2O3)23-.
Give the structure and names of five alkenes having the molecular formula C6H12 that produce hexane on catalytic hydrogenation.
The rate of phosphorus pentachloride decomposition is measured at a PCI5 pressure of 0.015 atm and then again at a PCl5 pressure of 0.30 atm. The temperature is identical in both measurements. Which rate is likely to be faster
1.2 mol of helium is mixed with 2.3 mol of argon in a volume of 1.0L and a temperature of 25.0C. Assuming that helium and argon are perfect gases, what is the pressure of the mixture
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