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A chemist wishing to do an experiment requiring 47Ca (half-life = 4.5 days) needs 5.0 mg of the nuclide. What mass of 47CaCO3 must be ordered if it takes 48 h for delivery from the supplier?
Transesterification of a certain triglyceride produced one molecule of methyl oleate and two molecules of methyl linoleate. Draw the original triglyceride.
Calculate the pH of 0.103 M phosphoric acid (H3PO4, a triprotic acid). Ka1 = 7.5 x 10^-3, Ka2 = 6.2 x 10^-8, and Ka3 = 4.8 x 10^-13.
At 25 degrees celsius how many dissociated H+ ions are in 167 mL of an aqueous sloution whose ph=12.07? hint find concentration of H+
an ideal gas initally at 600 K and 10 bar undergoes a four step mechanically reversible cycle in a closed system. In step 1-2, pressure decreases isothermally
Calculate the kg of fuel used for 100 kg mol of outlet ?ue gas and the kg mol of air used. (Hint: First calculate the mol O2 added in the air, using the fact that the N2 in the ?ue gas equals the N2 added in the air. Then make a carbon balance to ..
Assume the H atom oscillates toward and away from the I atom and that force constant of the HI bond is 314 N m^-1 , bond is 161pm. calculate (a) vibrational frequency of the molecule and (B) the wavelength required to excite the molecule into vibr..
Calculate the resulting pH if 150 mL of 1.50 M HClO4 is mixed with 500 mL of 0.125 M Ba(OH)2.
how many liters of oxygen will be produced if 162 grams of aluminum chlorate is decomposed
determine the equilibrium ph of aqueous solutions of the following strong acids or bases: a)15mg/l of hso4- b)10 mM NaOH c)2500 mg/l of HNO3.
Explore the effects of acid rain pre and post the 1990 Clean Air Act. Pair up and choose one of the topics listed below. One person should research and report on the damage that was being observed due to acid rain prior to 1990.
Calculate the molar solubility of iron sulfide in a solution that is saturated with hydrosulfuric acid, H2S ( [H2S] = 0.1 M) and has a pH of 2.0. Ka1 = 8.9 x 10^-8 and Ka2 = 1.2 x 10^-13.
During the discharge of an alkaline battery, 4.90of Zn are consumed at the anode of the battery. What mass of MnO2 is reduced at the cathode during this discharge?
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