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John Schreifels @GMU: What is the change in mass of 15N when it is formed from protons, electrons and neutrons if the atom has a mass of 15.00010897 amu? The masses of the proton, electron and neutron are 1.00728 amu, 0.000549 amu and 1.00867 amu, respectively.

John Schreifels @GMU: What is the balanced reaction for the following galvanic cell?Ni(s)| Ni2+(aq) || Fe3+(aq) | Fe(s)

@X@user.full_name@X@ @GMU: Which product in the reaction below is an acid (this one first in the answer) and which reactant is an acid?HClO + HO2- → ClO- + H2O2

@X@user.full_name@X@ @GMU: What is Kp for the reaction below, if Kc = 8.53e-5 at 439.0°C?2A(s) + 5B(g) → 4C(g)

@X@user.full_name@X@ @GMU: Determine the molality of a 7.239 wt % aqueous solution of LiBr.

@X@user.full_name@X@ @GMU: Calculate the pH of 116.02 mL of a buffer initially consisting of 0.1074 M (CH3)3N and 0.1420 M (CH3)3NHNO3 after addition of 0.0016 mol of HCl. Assume that no volume change occurs after addition of the acid. The Kb of (CH3)3N is 6.30e-5

@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 B (M/s), if the rate of consumption of C is 0.330 M/s? Use the reaction below:2A + 5B + 3C → products

@X@user.full_name@X@ @GMU: What is the fraction of A remaining after 62.466 minutes if the first order rate constant is 2.149e-4 s-1?

@X@user.full_name@X@ @GMU: What is the solubility in g/L of CO at a partial pressure of 288.7 torr, if the solubility at a partial pressure of 426.9 torr is 0.01636 g/L?