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Suppose a refrigerator is designed based on the Joule-Thompsoneffect. What characteristics (e.g., conduit design,type of gas, quantity of gas flow) determine how much heat can beremoved from the surroundings of the expanding gas per second forsuch a refrigerator?
the same retention but different selectivity as what precentage of mixtures for acetonitrile/water and tetrahydrofuran/water?
On size-exclusion chromatogram you have three peaks (2.9, 3.5, and 4.8 min). Column dead volume is 12 mL, and flow rate 4 ml/min. Are your separation conditions fit for size-exclusion requirements? Explain why.
an expandable cylinder filled with neon a monatomic ideal gas initially has a volume of 4.0 l at 1.5 atm and 20 oc.
Oxyanions of phosphorus are buffer components in blood. For a KH2PO4/Na2HPO4 solution with pH = 7.40 (pH of normal arterial blood), what is the buffer-component concentration ratio
Why do you need to keep a mixture of NaBH4 and MeOH in ice bath. Write down equation and explain why you have to put in ice immediately.
draw the structures for all the products obtained from the Diels - alders reaction of 2 methyl 1,3 butadiene and propene
Starting with 86.3 g NO and 25.6 g H2, find the theoretical yield of ammonia in grams
Suppose that the microwave radiation has a wavelength of 11.2cm . How many photons are required to heat 295mL of coffee from 25.0C to 62.0C
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 these two samples are mixed and then compressed in a 1.3 L vessel, what is the final pressure of the mixture. Assume that the temperature remains unchanged.
a 0.450-kg ice puck moving east with a speed of 3.00ms has a head-on collision with a 0.900-kg puck initially at rest.
calculate change of pH value when we add 100mL of 0,4M HCl to 100mL of 0,4M NH3. K(NH3)
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