@X@user.full_name@X@ @GMU: The osmotic pressure of a 14.019 mM solution of Fe(NO3)3 is 0.924 atm at 28.97 °C. How many ions per formula unit of Fe(NO3)3 must there be? The compound may not be completely ionic.

@X@user.full_name@X@ @GMU: The vapor pressure of benzene, C6H6, (l) at 314.9 K is 212.1 mm Hg. What is the heat of vaporization if its normal boiling point is 353.3 K?

John Schreifels @GMU: What is the change in mass of 185Re when it is formed from protons, electrons and neutrons if the atom has a mass of 184.952951 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: When 7.065 g of lysine was dissolved in 100.2 g of benzene, the boiling point was 354.5 K. What is the formula mass of this compound? The boiling point elevation constant for benzene is 2.53 (°C*kg)/mol. The melting point and boiling points are 5.50°C and 80.10°C, respectively.

@X@user.full_name@X@ @GMU: Which reactant in the reaction below is an acid (this one first in the answer) and which reactant is a base?NO-3 + HCO-3 → HNO3 + CO3-

@X@user.full_name@X@ @GMU: After 74.372 seconds the concentration of A was reduced from 0.3071 M to 0.2286 M. What is the first order rate constant?

@X@user.full_name@X@ @GMU: How much energy in kJ is released to form one mole of 191Ir from protons, electrons, and neutrons if the nucleus has a mass of 190.960584 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 would the be after addition of 5.94 mL of 0.1000 M NaOH to 25.00 mL of 0.1000 HA (a weak acid, Ka = 2.12e-4)?

@X@user.full_name@X@ @GMU: NO2 at 378°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 3.16e1 s when the initial concentration of NO2 was 7.73e-3 M. What is the rate constant for this reaction?2NO2(g) → 2NO(g) + O2(g)

@X@user.full_name@X@ @GMU: How much energy in kJ is released to form one mole of 87Rb from protons, electrons, and neutrons if the nucleus has a mass of 86.909187 amu? The masses of the proton, electron and neutron are 1.00728 amu, 0.000549 amu and 1.00867 amu, respectively.