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An acetate acetic acid buffer has a pH = 5.00, containing 0.100 M NaOAc. Calculate the pH of the solution after adding 10 mL of 0.10 M NaOH to 100 mL of this buffer.
A 0.0100 molal aqueous solution of a weak acid freezes at -0.0219 oC. Calculate the percent ionization of the weak acid, HA.
Consider a stoppered flask containing benzene, iodine, and air, which has reached equilibrium at 298K. Which one of the following statements concerning the system at equilibrium is true?
What is the final temperature when 125 g of iron at 92.3 °C is dropped into 50.0 g of water at 27.7 °C? The specific heat of iron is 0.444 J g-1 °C-1 and the specific heat of water is 4.184 J g-1 °C-1.
What volume of ammonia gas measured at 762 mm Hg and 21.0 °C must be absorbed by the same solution to neutralize the HCl?
RNAse is an enzyme that cleaves the P-O5\' bond in RNA. It has two His residues in the active site. Suggest a plausible explanation
A 1L steel tank is fitted with a safety valve that opens if the internal pressure exceeds 850 torr. It is filled with helium at 23 oC and 0.991 atm and placed in an oil bath. To what temperature (oC) will the oil bath need to be heated to first ..
Rank the fluorine species from most to least stable. To rank items as equivalent, overlap them.
Would the following procedural errors cause an increase, a decrease, or no change in your calculated molecular weight? Indicate clearly the reasoning in each case.
Identify the mass spectral (MS) peaks you would expect for 4-Heptanone (M+ and m/z for all fragments). Just FYI, the professor said
The radius of the Earth is approximately 6370 km. if one could dig down straight towards the center of the Earth, one would find that the innermost 3480 km (the core) has an average density of about 11.g/cm^3.
Determine the enthalpy change for the reaction. 2NO2 (g) -> 2NO(g) + O2(g) These are the given equations: NO + O3 -> NO2 + 02 DeltaH = -198.9 kJ / mol O3 -> (3/2)O2 DeltaH = -142.3 kJ/mol
Partial pressures of SO2 and N2, 3.00 g of SO2(g) is originally in a 5.00 L vessel at 21 degrees Celsius and is transferred to a 10.0 L vessel at 26 degrees Celsius. 2.35 g N2(g) is originally in a 2.50 L vessel at 20 degrees Celsius and is transf..
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