@X@user.full_name@X@ @GMU: What is the activation energy (in kJ/mol) for the reaction below if the rate constants are 2.700e-4 M-1s-1 at 327.00°C and 7.20e-4 M-1s-1 at 345.23°C?H2(g) + I2(g) → 2HI(g)

@X@user.full_name@X@  @GMU: When 9.889 g of aspirin was dissolved in 107.4 g of benzene, the freezing point was 276.0 K. What is the formula mass of this compound? The freezing point depression constant for benzene is 5.12 (°C*kg)/mol. The melting point and boiling points are 5.50°C and 80.10°C, respectively.

@X@user.full_name@X@ @GMU: What is the fraction of A remaining after 94.689 seconds if the first order rate constant is 5.751e-3 s-1?

@X@user.full_name@X@ @GMU: What is the solubility in g/L of CH4 at a partial pressure of 714.3 torr, if the solubility at a partial pressure of 531.0 torr is 0.01457 g/L?

@X@user.full_name@X@ @GMU: What must the reaction quotient Q be, if the free energy is -846.229 kJ at 25.0oC?4C2H2(g) + 5 H2(g) → C8H18(g) ΔGo = -819.870 kJ.

@X@user.full_name@X@ @GMU: What would the pH be after addition of 19.15 mL of 0.1000 M NaOH to 25.00 mL of 0.1000 HA (a weak acid, Ka = 3.71e-4)?

@X@user.full_name@X@ @GMU: What is the conjugate base and base dissociation constant of H3PO4 if its acid dissociation constant is 7.520×10-3 ?

@X@user.full_name@X@ @GMU: The osmotic pressure of a 13.236 mM solution of KOH is 0.423 atm at 16.03 °C. How many ions per formula unit of KOH must there be? The compound may not be completely ionic.

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

John Schreifels @GMU: What is the change in mass of 197Au when it is formed from protons, electrons and neutrons if the atom has a mass of 203.97302 amu? The masses of the proton, electron and neutron are 1.00728 amu, 0.000549 amu and 1.00867 amu, respectively.