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How might you use 13C NMR spectroscopy to determine if the brominated product (2,3-dibromo-3-phenylpropanoic acid) is contaminated with some unreacted starting material (during the bromination of trans-cinnamic acid)?
A student mixed 75.0 mL of water containing 0.75 mol HCl at 25 degrees C with 75.0 mL of water containing 0.75mo of NaOH at 25 degrees in a foam up calorimeter. The temperature of the resulting solution increased to 35 degrees C.
A pipette is used to add 32 mL of 0.2 M Pb(NO3)2 to a 261.0 mL solution of 0.3 M NaF. Determine the equilibrium concentration of Pb2+(aq) in the final solution. Ksp(PbF2)=3.6E-8.
a rectangular block of plastic, measuring 1.50 cm by 2.29 cm by 1.84 cm, floats in the middle of the Pacific Ocean. The volume of sea water displaced by the plastic block is 5.46 cm3. Assuming the density of the sea water is 1.025 g/mL, what is th..
Radio waves are very low energy forms of electrmagnetic radiation. What is the energy of a mole of radio wave photons with a
A "Nature Valley Trail Mix " chewy granola bar contains 140 calories (Cal). If this energy were to be used to heat up 4.25 L of water at 25 degrees Celsius
why does hydrochloric acid and acetic acid have the same equivalence, while hydrochloric acid and sulfuric acid
The heat of formation of Al2O3(s) is -1669 kJ/mol. Calculate the heat evolved when .267 g of Al burns in oxygen.
How many simabonds are there in a C60 molecule? 2. Which has stronger carbon-carbon bonds: graphite, diamond or C60? Please explain
Calculate the molar mass of a nonelectrolyte that lowers the freezing point of 25.00 g of water to -3.9 degrees Celsius when 4.27 g of the substance is dissolved in the water.
In an equilibrium mixture the partial pressures of SO2 and O2 are 0.165 atm and 0.755 atm, respectively. What is the equilibrium partial pressure of SO3 in the mixture?
Sulfuric Acid is the most commonly produced industrial chemical in the world. It is shipped in a concentrated form to save volume and weight.
A solution of water (Kf = 1.86 degrees C/m) and glucose freezes at -2.55 degrees C. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 degrees C. Express the molal concentration numeri..
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