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Pheromones are compound secreted by the females of many insect species to attract males. one of these compounds contains 80.78 percent C, 13.56 percent H, 5.66 percent O. A solution of 1.19 g of this pheromone in 7.23 g of benzene freezes at 2.52 Celsius. What are the molecular formula and molar mass of the compound?
(The normal freezing point of pure benzene is 5.5 Celsius)
How would you determine the dS and dH for Cu2+ binding soil given K (distance) values at two different temperatures
How were atomic masses for the elements determined?
For the following reactions, identify the substance that is the oxidizing agent and the substance that is the reducing agent.
What is the ratio of the enantiomeric products? b) What name is given to a mixture of enantiomers present in the ratio determined in part (a)?
And what are the correct settings for a perkin elmer UV-vis Lamda 40 for a calibration curve to pass through zero?
Consider the reaction of phosphorus and nitric acid. Determine how the oxidation number of phosphorus changes during this reaction. The phosphorus compound formed is phosphoric acid.
Helium gas is contained in a pressure vessel of volume V=10m3. Determine the mass (in kg) of helium in the tank if the temperature is 20°C and the pressure is 4 bar. Use the ideal gas law. For Helium, M=4.003 kg/kmol.
Explain how the smoke components, as well as the smoke itself
A metal was heat up in hot water and then put into a Styrofoam cup of water at room temperature. the specific heat was calculated.
What is the literature melting points for borneol and isoborneol. What would be expected for the melting point range of a mixture of the two isomers.
A 130 mL stock solution contains 1.5 M CuF2. When 11 mL of the stock solution is diluted to 23 mL, what will the concentration of F- ions be?
Predict whether the benzoin condensation would work with 4-tolualdehyde, 4- trifluoromethylbenzaldehyde, and 4-N ethylaminobenzaldehyde. Draw the structure of any products that are formed.
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