@X@user.full_name@X@ @GMU: When 3.160 g of urea was dissolved in 106.0 g of benzene, the freezing point was 276.1 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 conjugate base and base dissociation constant of H2CO3 if its acid dissociation constant is 4.300×10-7 ?

@X@user.full_name@X@ @GMU: What is the correct expression for the solubility product of copper (I) sulfide?Cu2S(s) → 2Cu+(aq) + S2-(aq)

@X@user.full_name@X@ @GMU: What is the value of Ksp in water, if 7.26e-6 M of A2B2 dissolves according to the reaction below?A2B2(s)→2A(aq) + 2B(aq) where A and B are ions

@X@user.full_name@X@ @GMU: BaO has a face-centered cubic unit cell in which the O2- anions occupy corners and face centers, while the cations fit into the hole between adjacent anions. What is the radius of Ba2+ if the ionic radius of O2- is 140.0 pm and the density of BaO is 5.720 g/cm3?

@X@user.full_name@X@ @GMU: What is the value of Ksp in water, if 1.08e-6 M of A3B2 dissolves according to the reaction below?A3B2(s)→3A(aq) + 2B(aq) where A and B are ions

@X@user.full_name@X@ @GMU: By how much would the rate of reaction (see below) change if the concentration of Cl2 increased by a factor of 2.413. The rate law of this reaction is Rate = k1/2.CHCl3(g) + Cl2(g) → CCl4(g) + HCl(g)

@X@user.full_name@X@ @GMU: What must the reaction quotient Q be, if the free energy is -248.125 kJ at 25.0oC?2C2H2(g) + H2(g) → C4H6(g) ΔGo = -216.790 kJ.

@X@user.full_name@X@ @GMU: The cell potential was -0.564 V at 25oC and a Cu2+(aq) concentration of 0.114 M. What was the hydronium ion concentration? The H2(g) pressure was 1 atm at 25oC.2H+(aq) + Cu(s) → Cu2+(aq) + H2(g) Ecoell = -0.340 V

@X@user.full_name@X@ @GMU: What is the rate of consumption of C (M/s), if the rate of consumption of A is 0.225 M/s? Use the reaction below:4A + 5B + 6C → products