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A compound contains only C, H, and O. To analyze the compound, you determine its empirical formula by analysis for C and H, and its molar mass by freezing point depression. (a) What is the empirical formula if a 0.01510 g sample gives 0.01102 g of H2O and 0.04484 g of CO2 on combustion? (b) If you dissolve 1.000 g of the powder in 100.000 g of camphor, you find that the melting point of the solution is 177.05 EC. Pure camphor melts at 179.75 EC. The kfp for camphor is !40.0 deg/molal. What is the molar mass of the white powder? (c) What is the molecular formula of the white powder?
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Give the steps to prepare the column required for the best purification of 0.40g of crude product using silica
Describe how branched-chain fatty acids affect the fluidity of membranes and rank the following fatty acids in the order of increasing solubility in water.
A cylinder fitted with a piston contains 3.00 moles of He gas (ideal!) at P = 1 bar and is held in a large constant-temperature bath at 400 K. The pressure is reversibly increased to 5.00 bar.
explain if you can use an integrated rate law to find the orders of each reactant in a reaction with more than one reactant
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The pressure is changed to 8.75 atm and the gas is cooled to 15 C. Calculate the new volume of the gas using the ideal gas equation.
A particular Lake contains 10^10 liter of water. Due to acidification, the pH of the Lake is 5.00. It has been decided to add enough calcium carbonate to the lake to bring the pH to 6.00.
Value of E: 1.3 g x 1 mole/100.09=1.29 x 10-2 moleCaCO3 Using the value in your answer to question E., calculate the number of moles of HCl that two TUMS
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What is the frequency of a photon emitted from a hydrogen atom when an electron makes a transition
What is the enthalpy change corresponding to the melting of 2.5 moles of H2O? What is the system? What is the surrounding?
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