@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: 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: 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: To what temperature would you have to heat carbon disulfide, CS2,(l) to cause its vapor pressure to become 176.7 mm Hg if its heat of vaporization and boiling point are 26.80 kJ/mol and 319.1 K, respectively?