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What effect did the addition of acetanilide have on the melting point of the unknown component? What about the addition of phenacetin?
water in a coffee-cup calorimeter (see above figure) the temperature rises from 24.00 oC to 40.03 oC. Calculate H in kJ/mol FeCl3 for the solution process.FeCl3(s) Fe3+(aq) + 3 Cl-(aq)
The molar enthalpy of fusion of solid silicon is 46.4 kJ mol-1, and the molar entropy of fusion is 27.6 J K-1 mol-1.
The molar mass of corn oil is 890g/mole. How many moles and how many grams of sodium hydroxide are required to react with the 15mL (13.7g) of corn oil? Show your calculations.
The normal boiling point of ethanol is 78.4 degrees C, and at this temperature ?vapHθ = 38.7 KJ mol-1. Calculate the value to which the pressure must be reduced to boil ethanol at 25 degrees C in a vacuum distillation.
What is the molarity of the carbonate ion in sodium carbonate, Na2CO3, prepared by dissolving 3.5 g of sodium carbonate in enough water to form 0.800 L of solution?
Explain why Î"G can only be used to determine the spontaneity of a reaction. Be very detailed in your answer.
what is the total volume of gases produced by the combustion of 500g of butane. assume 1 atm, temp 28 degrees C and that water is produced as a gas
Explain Molecular and Empirical Formulas, Ibuprofen, a headache remedy, contains 75.69% C, 8.80% H and 15.51% O by mass, and has a molar mass of 206g/mol.
A calorimeter contains 27.0 mL of water at 11.0 C. When 2.10 g of X (a substance with a molar mass of 74.0 g/mol) is added, it dissolves via the reaction X{(s)}+H_2O{(l)} -> X{(aq)}
a sample of oxygen occupies 178 mL in a cylinder shown at a barometric pressure of 734 torr and 25 degrees Celcius. If the piston is pushed in and compresses the oxygen sample to 134 mL, what is the pressure (in torr) of the gas?
What is the molarity of acetic acid, CH3COOH (MM= 60.0) in vinegar if a 5.00mL sample of vinegar requires 22.50mL of a 0.195M NaOH solution to neutralize it?
A 36.4 l volume of methane gas is heated from 15 degrees C to 98 degrees C at constant pressure. what is the final volume of the gas?
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