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Question- Write the steps in the mechanism of the base catalyzed aldol. condensation of cyclohexanone with two molecules of benzaldehyde.
Predict the compounds formed from the base catalyzed condensation of acetone and acetaldehyde.
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Intramolecular forces refer to the bonding forces within a molecule. Choose which forces are involved in the following change. those allowing fog to form on a cool, humid evening in Houston a. intramolecular b. intermolecular c. both d. neither
Explain why the melting temperature of a double-helical DNA increases when the Na+ concentration increases.
A solution is prepared my mixing 40 mL of pentane (C5H12, d = 0.63 g/mL) with 100 mL of hexane (C6H14, d = 0.66 g/mL). Assuming the volumes add upon mixing, Calculate-
The concentrations of lead in blood samples are often reported in units of micromoles of lead per liter of blood. Calculate the value of the concentration in these units of a blood sample containing 45 ppb lead.
Write the reaction mechanism for the synthesis of 1-bromobutane from 1-butanol by reaction with sulfuric acid and sodium bromide. (sn2)
You only want to add 5μL of vincristine solution to your cells. Explain what concentration should you make your stock solution of vincristine in order to make this 5uL addition
Determine the osmotic pressure of a solution that contains 0.042 g of a hydrocarbon solute (molar mass = 340 g/mol) dissolved in benzene to make a 350-mL solution. The temperature is 20.0°C.
Find the temp (in K) above which a reaction with a delta H of 123.0 kj/mol and a delta S of 90.0 J/k*mol becomes spontaneous.
The subscripts in a chemical formula represent the relative mass of each atom in a chemical compound. Explain why
a sample of nitromethane is sealed in a 15.0-l flask with oxygen gas in the stoichiometric ratio indicated in the
The freezing-point depression measurement of benzoic acid in acetone yields a molar mass of 122 g; the same measurement in benzene gives a value of 242 g
Compare the experimental mole ratio of NaHCO3 to NaCl with the theoretical mole ratio. Explain the difference. The experimental mole ratio is 1:1.
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