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What is the maximum number of phases that can be in mutual equilibrium in a four component system?
In making the 3,5-dinitrobenzoate ester derivative, what compounds could be present besides the ester? Indicate any step in the procedure that is intended to remove a possible impurity.
what do you think Does it mean that their properties also differ from a classical model of matter?
a calorimeter consists of metal parts with a heat capacity of 850.0 j k-1 and 1100 g of oil with a specific heat of
A sample of gas is collected over water at a temperature of 35.0C when the barometric pressure reading is 763 torr. What is the partial pressure of the dry gas, given PH2O =42.2 torr?
The solubility of compound A in ethanol is 0.80g per 100.0mL at 0oC and 5.00g per 100.0mL at 78oC. What is the minimum amount of ethanol needed to recrystallize a 12.00g sample of compound A.
pure acetylsalicylic acid in water and titrated solution to equivalence point using 88.43 ml of .102 M NaOH (aq) Assuming that acetylsalicylic acid has only one ionizable hydrogen calculate molar mass of acid
a student performs two melting-point determinations on a crystalline product. in one determination, the capillary tube contains a sample about 1-2 mm in height and the melting range is found to be 141 degree - 142 degree celsius
the tetraethyl lead pbc2h54in a 25.00 ml sample of aviation gasoline was shaken with 15.00 ml of 0.02381 m i2. hint one
Structure of major compound formed from: alpha-D-methoxyglucopyranose + TBDPS-Cl/AgNO3
Write a balanced net ionic equation that occurs when the slightly soluble salt Mn(OH)2 (s) dissolves in water, forming aqueous ions.B. Calculate the molar solubility of Mn(OH)2 (Ksp = 2.0x10-13) in pure water.
A compound with the molecular weight of 391.98 was determined to be 3.1% Hydrogen, 31.5% Phosphorous, and 65.4% Oxygen. Determine the empirical formula and the molecular formula for the compound.
Determine the following characteristics of the titration curve for 25.0 mL of 0.400 M NH3(aq) titrated with 0.335 M HI(aq). (For NH3, Kb = 1.8x10-5.) (1a) The initial pH : (1b) The volume of HI(aq) required to reach the equivalence point : (1c) Th..
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