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Draw the three different plates you would expect from obtaining a TLC from ibuprofen on silica gel using (a) toluene, (b) ethyl acetate, and (c) methanol as the eluting solvents. Explain the trend.
A sample of CO2 gas at 795 torr is cooled from 25°C until the new pressure is 125 torr. Calculate the new temperature of the gas.
An Ideal gas is in a 375mL Container. Pressure inside is 1012 mmHg. Temp is 31.3 deg Celsius. How manly moles of Ideal Gas are there?
Using a sample of 0.385 g of Alka-Seltzer, the mass of Carbon dioxide is found to be 0.122 gram. Compute and enter response (in numerical value only) to three significant figures.
a 25.00mL sample of NaClO is titrated with 0.001005M HNO3. If 10.02mL of of HNO3 is required to reach the endpoint of titration, determine the concentration of ClO- in the original sample.
How much heat energy, in kilojoules, is required to convert 74.0 g of ice at -18.0 C to water at 25.0 C ?
Sodium chloride has solubility in water at 100.0°C of 39.1 g sodium chloride per 100 g of water. Calculate the boiling point of a saturated solution of sodium chloride in water.
what is the differences between partial and full method validation? under what circumstances are they being carried out?
In one experiment, the mass of water is 93.0 grams, the initial temperature of the water is 67.2oC, the mass of liquid nitrogen added to the water is 57.8 grams, and the final temperature of the water, after the liquid nitrogen has vaporized, is 3..
Draw the Lewis structure for each of the following molecules or ions, and predict their electron-domain and molecular geometries.
determine the partial pressure and the total pressure in a 2.50 L vessel containing the following mixture of gases at 17.8 degrees celsius
Draw the structures of 1-phenyl ethanamine and tartaric acid. Calculate how much of each compound would be needed to create
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.508g/L at 25C and 721mmHg?
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