John Schreifels @GMU: What is the total entropy change at 25oC for the reaction below, if the standard entropies of reactants and products are So(C(gr)) = 5.74 J/mol*K, So (H2(g)) = 130.68 J/mol*K, and So (C3H8(g)) = 270.2000J/mol*K and the heat of formation of C3H8(g)) is -103.8500 kJ/mol.C3H8(g) → 3C(gr) + 4H2(g)

@X@user.full_name@X@ @GMU: Which product in the reaction below is an acid (this one first in the answer) and which product is a base?BrO- + HCO-3 → HBrO + CO3-

@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 2.481. 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 is the equilibrium concentration of H3O+ in 0.1724 M H2S? See reaction belowH2S + H2O → HS- + H3O+ Ka = 9.100×10-8

@X@user.full_name@X@ @GMU: The osmotic pressure of an unknown solution is 0.568 atm at 12.84 °C. Which of the solutions below is the most likely one? Assume any salt is completely ionic!

@X@user.full_name@X@ @GMU: What is the pOH of 5.60e-3 M HCl?

@X@user.full_name@X@ @GMU: Which of the crystalline substances below is an example of a covalent network solid?

@X@user.full_name@X@ @GMU: The osmotic pressure of a 12.498 mM solution of Co(NO3)3 is 0.766 atm at 17.85 °C. How many ions per formula unit of Co(NO3)3 must there be? The compound may not be completely ionic.

@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 ?