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Gold-198 is a beta emitter with a half-life of 2.7 days. what percentage of a Gold-198 sample remains after 13.5 days? what other product is formed, and what percentage of the original sample has been converted to this species after 13.5 day?
What is the freezing point (°C) of a solution prepared by dissolving 11.3 g ofCa(NO3)2 (formula weight= 164 g/mol) in 115 g of water? Assume that i=3.00 for Ca(NO3)2 and the molal freezing point depression constant for water is1.86°C/m.
If the molar solubility of Cd3(PO4)2 at 25 oC is 1.19e-07 mol/L, what is the Ksp of Cd3(PO4)2 at this temperature
plot the temperature distribution in all relevant dimensions for each side of the aluminum cylinder as a function of position for 5 different time intervals, ranging between (and explicitely including t=0 and t= infinity
one mole of methane has a mass of 16.0 grams. how many grams of methane are needed to make 1.0 l of a 0.20 molar
Compare and contrast diethyl ether as a general anesthetic to the modern gaseous ther general anesthetics used today. What are the benefits
the transport of glucose from the intestine across the intestinal cell into the blood. Identify each step and their order by dragging the description into the appropriate box.
During the isomerization of trans-1,2-dibenzoylethylene C16H12O2 using 95% Ethanol C2H6O , and UV light irradiation. What is the overall equation for this reaction. What is the product.
Given 5.2 g of hydrobromic acid (48%) calculate the number of mL. (MW HBr: 80.91 g/mol, density: 1.49 g/mL) I am getting 1.675 but it is counting it wrong. Anyone else getting something different
A certain first-order reaction (products) has a rate constant of 6.90×10-3 s^{-1} at 45 C. How many minutes does it take for the concentration of the reactant, [A], to drop to 6.25% of the original concentration?
In a semi-conductor, the molecular orbital states that allow for the conduction of electric current are the lowest energy states available and the higher energy states available
if 30.15 ml of 0.0995 M naoh is required to neutralize 0.216 g of an unknown acid, HA, what is the molecular weight of the unknown acid
What simple compund reacts with carboxylic acid to make lidocaine? Identify and draw the structures of two simpler compounds one from which should be a carboxylic acid, from which you could make lidocaine.
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