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Unknown compound X is spotted on a TLC plate that is then developed in hexane. The solvent front is measured at 4.5 cm as well as the distance traveled by compound X is measured at 1.5 cm. A sample of caffeine is spotted on the TLC plate that is then developed in a 1:1 hexane/ethyl acetate solution the solvent front is measured at 6.5 cm as well as the distance traveled by caffeine is measured at 2.15 cm. Explain what can be found about the identity of compound X in light of this data.
120g of iron heated to 100c and put into a calorimeter with 100ml of water at 20c. The final temperature of the water and iron mixture is 30c.
A sample is composed of a mixture of CaCO3 and CuSO4*5H2O. A chemist decided to analyze the mixture by dehydrating it by heating it to 120 degrees Celsius for 12 hours. If a 5.327 g sample weighed 4.281 g after dehydration
A sample of S8 (g) is placed in a container at 1325 K at an initial pressure of 1.00 atm, where it decomposes to S2 (g) by the reaction, S8 (g) 4S2 (g), At equilibrium, the partial pressure of S8 (g) is 0.25 atm. The Kp at 1325K is
Calcium and Magnesium carbonates occur together in the mineral dolomite. Suppose you heat a sample of the mineral to obtain the oxides,CaO and MgO
Which statement is correct concerning the resulting titration curve when a weak acid is titrated with a strong base
1. partition functions for particle in the boxconsider the he atom again with the three wave functions that you do not
you have two flasks of equal volume. Flask A contains H2 at 0 degree celsius and 1 atm pressure. Flask B contains CO2 gas at 25 degree celsuis and 2 atm pressure. Compare these two gases with respect to each of the following:
The reaction of an equimolar mixture of isopentyl alcohol also acetic acid will produce, at most 67% of the theoretical amount of isopentyl acetate. Confirm this with an equilibrium constant computation using K=4.2
Cesium(Cs) is used extensively in television cameras and in photocells because it has lowest ionization energy of all the stable elements.Determine the maximum kinetic energy of a photo electron ejected from cesium.
Sulfur dioxide can be produced in the laboratory by the reaction of hydrochloric acid and sodium sulfite. The skeleton equation for this reaction is: Na2SO3 + HCl --> NaCl + SO2 + H2O
What volume of 0.382 M NaOH is needed to reach the equivalence point in the titration of 24.9 mL of 0.0390 M chlorous acid, and what is the name of the salt that is formed during the titration
Ammonia has a melting point of 195 K and a normal boiling point of 240 K. At 225 K and 1atm, ammonia exists primarily as
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