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Potassium - 42 is a radioisotope that nutritionists use to determine whether the body is effectively using potassium at the cellular level.
The half-life of potassium-42 is 12.4 hours. Assuming that a patient's cells assimilate all the potassium chloride tagged with potassium-42, approximately what percentage of the dose remains in 2.1 days? __________ .
What is the band gap energy in kilojoules per mole if bule diamonds absorb orange light with a wavelength of 675nm
Define the metabolism of on glycerol trioleate, C51 H93 O6, a common fat, produces 3.022*10^4kj of heat. Explain how many grams of the fat must be burned to increase the temperature of 50g of water from 25 degrees Celsius to 30 degrees Celsius
Why is the resonance energy of pyrrole (21 Kcal/mol) greater that the resonance energy of furan (16 kcal/mol)
calculate the vapor pressure of an aqueous solution at 30 degrees c made from 100 g of sucrose c12h22o11 and 100g of
Make a list of the operations you will need to perform in order to display a spectrum of your food dye on the spectrophotometer.
warmed then 125 microliters of unknown xylene and 10 mg detergent were refluxed for 45 minutes. Then we added sodium bisulfite until the purple color was gone for one step. What is the role of sodium bisulfite in such a procedure?
we used 5 different concentration levels to test the absorbtion a potato slice had (to increase its weight) then we had to make a scatter plot chart and find the isotonic point
How many types of nonequivalent protons does the following compound contain. (CH3)2CHCl Why
It required 71.5 mL of a 0.155 M KNO3 solution to fully react the copper in the ore sample. What was the percent copper in the ore.
how many whole drops (.05 mL/drop) of 6 M HCl are required to dissolve the calcium carbonate? b) What is the Ca concentration when this is dissolved and diluted to 100.00mL
why is it an important concept that atoms generally appear in whole number molar ratios to each other in chemical
A 50.00ml solution of the acetylsalicylic acid HC9H7O4 is titrated with 0.1000 M KOH. It needed 22.08 ml of KOH to reach the equivalence point of the titration. Ka = 3.0x104
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