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What is the wavelength (in meters) of photons with the following energies? In what region of the electromagnetic spectrum does each appear?
Calculate the density and radius of the ball bearing (volume of a sphere of radius r is 4/3pi r^3).
How many grams of aluminum hydroxide are obtained from 18.2g of aluminum sulfide?
what product would be obtained if acetaminophen were hydrolyzed in acidic aqueous solution?
Phosphoric acid is a weak triprotic acid with the formula H3PO4. If you have 50.0 mL of a 1.0 M solution of H3PO4, how many grams of NaOH (MM = 40.0g/mol) should you add to make a buffer with a pH of 7.00?
The recommended dose is 10 body weight. How many of this suspension should be given to an infant weighing 16
A gaseous mixture of NO2 and N2O4 is in equilibrium. If the concentration of NO2 is 8.1*10-4 M what is the concentration of N2O4
How do the requirements that t and v are constant enter the derivation for delta Asys
Ethyl chloride vapor decomposes by the first-order reaction C2H5Cl --> C2H4 + HCl The activation energy is 249 kJ/mol and the frequency factor is 1.6 X 10^14 s^-1 The rate constant at 730 K is 2.4 x 10^-4 s^-1. 1)
write equations for the chemical reactions that occurred between the aqueous solutions of the oxides of sulfur and calcium and between the aqueous solutions
find the methylmercury CH3Hg concentration in fish at which regular consuption at 50g/day becomes unacceptable health risk. use epa reference dose for methylmercury
Explain the order of elution you observed while performing the gas chromatography for this experiment. What property of the product molecules seems to be the most impor- tant in determining relative retention times?
What is the approximate pH of a solution of the salt NH4(O2CCH3) (ammonium acetate)? No calculations -- only reasoning needed. pKa/pKb values in your notes
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