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An important characteristic in the fischer esterification mechanism is the formation of a tetrahedral intermediate which is the result of
a. the alcohol attacking the 2-phenylacetic acid with the subsequent loss of a proton.
b. protonation of the ethanol by H2SO4.
c. protonation of the carbonyl oxygen of the 2-phenylacetic acid.
d. protonation of the hydroxyl group of the 2-phenylacetic acid.
A 1.013-g sample of ZnSO4xH2O is dissolved in an aqueous solution of BaCl2. The pure BaSO4 precipitate is filtered out of solution, dried, and its mass is determined to be 0.9400 g. What is the value of x in ZnSO4xH2O?
The density of a 50% solution of NaOH is 1.525 g/mL. What volume of a solution that is 50% by weight NaOH is required to make 1 Liter of 0.15M NaOH solution.
A 1.07 g sample of a Noble gas occupies a volume of 363 mL at 35°C and 678 mmHg. Identify the Noble gas in this sample? A) He B) Ne C) Ar D) Kr E) Xe
Discuss the common-ion effect by comparing the solubility of CaCO3 in 3.0 x 102 ml of water and in the presence of 0.015 mole of Ca(NO3)2.
1. how much energy is required to warm 175 ml of water at 18.5degc to 85.0degc? assume the specific heat of water to be
Silver chloride, often used in silver plating, contains 75.27% Ag. Calculate the mass of silver chloride required to plate 225 mg of pure silver.
use any resources available to you to find the structures of these drugs and then identify the functional group or
calculate the purity of the ammonium chloride in the sample.
1g soil has been spiked with 0.1ml of 100 ppm (v/v) trimethylbenzene and subsequently extracted with 250 mL pentane. The extract is then measured with GC-FID.
Calculate the heat evolved when 75.0 mL of a 2.00M HCl solution reacts with 37.5 mL of a 4.00M NaOH solution if the temperature rises from 20.0 degree C to 37.9 degree
Which metal is associated with the synthesis of cyclopropanes?
A sample of neon gas occupies a volume of 2.8L at 1.8 atm. What would be its volume at 1.2atm
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