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Explain why if benzoic acid were substituted for 2-methoxyphenylacetic acid in this experiment the enantiomeric ratio of the yeast reduction product could not be determined by 1 H NMR. If you begin with 50 mmol of benzaldehyde, and all 4 steps in your synthesis proceed in 100% yield and you were to use all of the product of each step in the next, what would be the yield of final product in grams? What if each step proceeds in 75% yield?
A mixture of FeO and Fe2O3 with a mass of 10.0 g is converted to 7.43 g Fe of pure Fe metal. What are the amounts in grams of FeO and Fe2O3 in the original sample
Octane has a density of 0.692 g/mL at 20 degrees celsius How many grams of oxygen are required to burn 1.10 gal of octance.
What one reagent should re-energize the light solution after it has faded? Explain using moles and limiting reagents.
When sodium is heated, a yellow spectral line whose energy is 3.37x10^19 J/photon is produced. What is the frequency and wavelength of this light?
How many liters of oxygen are needed to exactly react with 19.8 g of methane at STP?
Consider a situation in which 211g of P4 are exposed to 240g of O2. What is the maximum amount of P2O5 that can theoretically be made from 211g of P4 and excess oxygen?
Suppose a snack bar is burned in a calorimeter and heats 2,000 g water by 20 °C. How much heat energy was released? (Hint: Use the specific heat equation.) Give your answer in both joules and calories.
Calculate the minimum volume of distilled water, in liters, necessary to completely dissolve a 7.5 g sample of AgBr (s) at 298K. The molar mass of AgBr is 188 g mol
The solubility product of lead chromate is 2.0x10^-16 calculate the solubility in moles per liter of lead chromate in each of the following solutions:
Calculate the standard entropy change for the reaction 2H2(g)+ 02(g) --> 2H_2O(l) using the data from the following table: Substance Delta Hf degrees Delta Gf degrees S degrees
A 355 ml container holds .146g of Ne and an unknown amount of Ar at 35 degrees C and a total pressure of 26 mmHg. Calculate the moles of Ar present
How does the entropy of the system PbI2(s) + H2O(l) change as PbI2 (s) dissolves in water at 25 degrees celsius? Explain your answer.
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