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What is the [H3O+] of a buffer that consists of 0.154 M CH3CH2COONa and 0.645 M CH3CH2COOH? Ka of propanoic acid, CH3CH2COOH is 1.3 x 10-5. Use E notation and 3 significant figures.
The mass spectrum of an organic compound shows the relative abundance of M to be 34.29% and M+1 to be 8.901%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon atoms in the compound. Natural abundance: 12C is 98..
What is the molarity of a calcium hydroxide solution if a 25.0 mL sample is exaclty neutralized by 42.5 mL of 0.0750 M nitric acid?
Calculate the grams of Titanium that will be plated from a Ti(NO3)4 solution using a current of 15 amperes for 3 hours
What is the reaction rate when the concentration of ClO2(aq) is 0.0613 M and that of OH-(aq) is 0.130 M if the temperature is the same as that used to obtain the data shown above
Calculate the vapor pressure of water, in torr, above a solution prepared by dissolving 65.40 g of ZnCl2 in 445.0 g of water at 323.0 K. The vapor pressure of pure water at 323.0 K is 92.50 torr.
For TiCl4, delta H (not) is 54.3 kJ/mol and delta S (not) is 133 J/mol*K what is the boiling point of TiCl4 in degrees C
Calculate the vapor pressure of a solution prepared by dissolving 70.0 g of naphthalene, C10H8 (a nonvolatile nonelectrolyte), in 220.0 g of benzene, C6H6, at 20°C. Assume the solution is ideal. The vapor pressure of pure benzene is 74.6 torr at 2..
How would the Rf values change if you used pure dichloromethane ( no methanol ) as the mobile phase for the TLC separation of curcumin
suppose a 0.100 M solution of each of the following substances is prepared. Rank the pH of the resulting solutions from lowest to highest: KF, NH4I, HBr, NaCl, LiOH.
What is the enthalpy change for the combustion of 12.5 g C4H10 in excess oxygen? C4H10 g + 13/2 O2 g = 4 CO2 g + 5 H2O g H= -1895 kJ
If a car has an EPA mileage rating of 30 miles per gallon, What is this rating in km L-1? 1 liter = 1 dm3, 1 gallon = 3.785 liter, 1 mile = 1.609 km.
Under certain conditions of temperature and pressure, 15.0 mL of a gas "Cb" with a molas mass of 56.0 g/mol effused through a pinhole in 30min.
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