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As a separation and detection method, would TLC or paper chromatography yield better results in the analysis of each of the following pairs of compounds?
(a) CH3CH2 SO3H and CH3CH2SO2NH2
(b) H2N ring CO2H and ring CO2H
(c) CH3(CH2)6COCH3 and CH3(CH2)6COHHCH3
Identify the mass spectral (MS) peaks you would expect for 4-Heptanone (M+ and m/z for all fragments). Just FYI, the professor said
4. How many grams of NaNO3 would you add to 250g of H2O in order to prepare a solution that is .500 molal in NaNO3?
the 20 ml of water added to the erlenmeyer flask is to be previously boiled deionized water. Since water does absorb CO2 from the atmosphere and since CO2 dissolved in the water causes it to be slightly acidic
How many moles of HCL must be added to 1.50L of 1.70M KOH to obtain a pH of 2.00?
Calculate the frequency of the loght corresponding to the lowest energy pure virational and pure rotational transitions. In what regions of the eletromagnetic spectrum do the transitions lie?
An unknown compound contains only carbon, hydrogen, and oxygen (C_xH_yO_z). Combustion of 5.50 of this compound produced 8.07 of carbon dioxide and 3.30 of water.
Using as sample of gas of 12.0 moles are in a tank of 8.00 Litres at the temperature of 22.6 degree celsius. compute the difference in pressure between CH 4 and an ideal gas under these conditions
Five metal rods (Copper, Iron, Nickel, Tin and Zinc), at room temperature, of equal mass are place in a 100 oC water bath. Which metal will reach 80 oC first.
At 4.00 L, an expandable vessel contains 0.864 mol of oxygen gas. How many liters of oxygen gas must be added at constant temperature and pressure
Carbon and silicon belong to the same group and are known to have similar properties. Do you think that silicon can replace the role that carbon
What is the partial pressure of hydrogen and nitrogen when the gas mixture is composed of 8.00 g hydrogen and 56 grams nitrogen.
A 1L steel tank has a safety valve that opens when the internal pressure exceeds 850 torr. The tank is filled with He at 23 oC and 0.991 atm.
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