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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 and the distance traveled by compound X is measured at 1.5 cm. A sample of caffeine is spotteed on the TLC plate that is then developedi n a 1:1 hexane/ethyl acetate solution the solvent front is measured at 6.5 cm and the distance traveled by caffeine is measured at 2.15 cm. What can be determined about the identity of compound X in light of this data.
Draw a Lewis structure for each of the following molecules, and then use the VSEPR theory to predict the molecular deometry of each.
The formula of a complex formed by a reaction such as M + nX = MXn can be determined by the method of continuous variations. The absorbances of a series of solutions of varying composition are measured at the wavelength at which the complex shows ..
For the reaction given below at 700°C, Kc = 0.534. H2(g) + CO2(g) reverse reaction arrow H2O(g) + CO(g) Calculate the number of moles of H2 that are present at equilibrium
what is the minimum velocity that the fluid should travel at in order to remain in the most efficient flow regime for heat tranfer if the fluid is i)water ii)paraffin oil iii) helium (1 atm) in each case Tinfinity= 75 deg
The volume of a sphere is . A sphere of metal has a radius of 1.56 cm. It has a mass of 147.9 grams. What is the density of this metal?
A 1.00 g sample of a gaseous compound of boron and hydrogen occupies 0.820 L at 1.00 atm and 3 degrees C. What is the molecular formula for the compound
A mixture of p-nitroaniline and o-nitroaniline is separated by column chromatography. which compound will be eluted first? Give reason.
what is the theorectical yield of disulfure chloride? what mass of the excess reactant reamains when the reaction is completed?
how many grams of copper are produced when excess aluminum reacts with 11.0 g of copper oxide.
a weather ballon filled with helium has a volume of 1.0*10^-4L at 1.00 atm and 30.0C. it ascends to an altitude at which the pressure is only 0.60 atm and the temperature is -20.0C. what is the volume of the ballon at the higher altituda.
Calculate the molar concentration of H3PO4 in this solution: Calculate the number of grams of this solution required to hold 87.5 g H3PO4:
Ammonia is produced by the reaction of hydrogen and nitrogen N2(g)+3H2(g)--->2NH3(g). a) How many moles of H2 are needed to react with 1.0 mol of N2? b) How many moles of N2 reacted if 0.60 mol of NH3 is produced?
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