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What are the advantages and disadvantages of using methanol, ethanol and water as a solvent for reactions with sodium borohydride?
How many grams of NH4Cl must be added to 0.490 L of 1.00 M NH3 solution to yield a buffer solution with a pH of 8.90?
A 10.00 mL 0.25 M formic acid sample is being titrated with 0.25 M NaOH. What is the pH of the solution after adding 15.00 mL NaOH solution?? Ka=1.8x10-4
Which reaction sequence would be best to prepare m-chloroaniline from benzene? a. chlorination, nitration, reduction
Calculate the standard free-energy change for the following reaction at 25 degrees C. 2Au^3+(aq) + 3 Cr(s) 2Au(s) + 3Cr^2+(aq)
1.00 x 10-2 M Mg(NO3)2 and 250 ml of 1.00 x 10-1 M NaF.Calculate the concentrations of Mg2+ and F- at equilibrium with solid MgF2 (Ksp of MgF2 = 6.4 x 10-9).
How much heat energy is required to convert a 1.00 L block of ice at -40.00 degrees Celsius to steam at 250.0 degrees Celsius?
Calculate the pH at the equivalence point in a 0.10 M acetic acid/0.10 M sodium hydroxide titration when 27.4 mL of NaOH was used in titration.
A sample of gas has an initial volume of 13.8L at a pressure of 1.26 atm If the sample is compressed to a volume of 10.8L, what will its pressure be?
Calculate the pH of the solute in an aqueous solution of 0.372 M (CH3)3N(aq) if the Kb is 6.5 Ã- 10âˆ'5.
a column of air with a pressure of 1.57 x 105 Pa and an area of 1.07 m2 and given that the acceleration due to gravity is 9.8 m/s2, what is the mass of the column.
Iron is obtained commercially by the reaction of hematite (Fe2O3) with carbon monoxide. How many grams of iron is produced when 25 mol of hematite reacts with 30 mol of carbon monoxide? with the balanced equation of Fe2O3 + 3CO = 2Fe + 3CO2
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 265.0 Torr at 45.0 °C. Calculate the value of ?H°vap for this liquid. Also, calculate the normal boiling point for this liquid.
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