@X@user.full_name@X@ @GMU: What is the balanced reaction at the anode for the following galvanic cell?Cd(s) | Cd2+(aq) || Cu2+(aq) | Cu(s)

@X@user.full_name@X@ @GMU: NO2 at 383°C decomposes to form NO and O2 according to second order kinetics (see reaction below). The half-life for this reaction was measured to be 3.46e1 s when the initial concentration of NO2 was 6.03e-3 M. What is the rate constant for this reaction?2NO2(g) → 2NO(g) + O2(g)

@X@user.full_name@X@ @GMU: Determine the molality of a 5.664 wt % aqueous solution of NaF.

John Schreifels @GMU: What is the change in mass of 82Kr when it is formed from protons, electrons and neutrons if the atom has a mass of  81.913482 amu? The masses of the proton, electron and neutron are 1.00728 amu, 0.000549 amu and 1.00867 amu, respectively.

@X@user.full_name@X@ @GMU: What is the balanced reaction at the anode for the following galvanic cell?Cu(s) | Cu2+(aq) || Sn2+(aq) | Sn(s)

John Schreifels @GMU: What is the change in mass of 93Nb when it is formed from protons, electrons and neutrons if the atom has a mass of 92.9063772 amu? The masses of the proton, electron and neutron are 1.00728 amu, 0.000549 amu and 1.00867 amu, respectively.

@X@user.full_name@X@ @GMU: Uranium -238 decays in a series of steps to Pb-206. When the material is very old, one can treat the kinetics as a decay directly to Pb and the ratio of these two can be treated as a measure of the age of a rock. A rock containing 238U and 206Pb was examined to determine its approximate age. The molar ratio of 206Pb to 238U was 0.2212. Assuming no lead was originally present and that all lead formed remained in the rock, what is the age of the rock (in years)? The half-life of 238U is 4.50e9 yr.

@X@user.full_name@X@ @GMU: Which reactant in the reaction below is an acid (this one first in the answer) and which product is an acid?ClO-4 + H2SO4 → HClO4 + HSO-4

@X@user.full_name@X@ @GMU: The cell potential was -0.248 V at 25oC and a Sn4+(aq) concentration of 0.149 M. What was the hydronium ion concentration? The H2(g) pressure was 1 atm at 25oC.2H+(aq) + Sn2+(aq) → Sn4+(aq) + H2(g) Ecoell = -0.150 V

@X@user.full_name@X@ @GMU: What is the rate of consumption of A (M/s), if the rate of consumption of B is 0.287 M/s? Use the reaction below:3A + 2B + 4C → products