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During a work-up, we are asked to interrupt vacuum, "drizzle" cold methanol over the crude product, then reestablish vacuum. What is the purpose of this step and why does the methanol need to be cold?
If the imaging agent had an initial rate of 7500 decays per minute (dpm) and if the imagine required 1 hour to complete, what would the decay rate be immediately after the test is completed?
how many moles of N atoms are there in .882 moles of (NH2)2CO?
Brominated biphenyls (PBB) is created through an electrophilic aromatic bromization out of the hydrocarbon biphenyl.
Explain how the acid hydrolysis of starch differs from the enzyme catalyzed hydfolysis. Compare products as well as conditions of time
When N2O5 (g) is heated it dissociates into N2O3 (g) and O2(g) according to the following reaction: N2O5(g) N2O3(g) + O2(g) Kc= 7.75 at a given temperature. The N2O3(g) dissociates to give N2O(g) and O2(g) according the following reaction:
diamond crystallizes in a cubis cell with a+0.35670 nm and Z=8. Using 3.51 g/cm cubed as the density of diamond calculate te value of avagadro's number.
The unit cell of platinum has a length of 392.0pm along each side. Use this length and your answer from part a (14 particles in unit cell, coordination #=12, 4 unique particles per unit cell) to calculate the density of platinum metal in kg/m3
Consider the following reaction how many moles of oxygen are requited to produce 1.50 moles of water. Assume that there is an excess of C3H7SH present.
For the equilibrium H2(g)+ CO2 (g) H20 (g) + CO(g) Kc = 3.18 at 1106K. If each of the four species was initially present at a concentration of 3.000M, calculate the equilibrium concentration of the CO(g) at this temperature
Calculate the potential of the cell. Indicate whether the reaction will proceed spontaneously in the direction considered (oxidation on the left, reduction on the right) or an external voltage source is needed to force this reaction to occur
what is the order of increasing steric hindrance within these reactions and what is the reason for that order in terms of calculated energies, distance, and structures.
magnetite was found to contain 2.5698 g of iron and 0.9816 g oxygen. What is the empirical formula for this oxide of iron?
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