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For the decomposition of mercury(II) oxide, HgO, to mercury and oxygen: 2HgO(s) → 2Hg(l) + O2(g)   ΔGo = 117.1 kJ What is the standard Gibbs free energy of formation (ΔGfo) of mercury(II) oxide?

Which solution all at 25 oC will have the highest vapor pressure? Assume all solutions are ideal.

Which set of quantum numbers is correct and consistent with n = 3?

A mixture is made of 100.0 mL of water and 1.0 g of silver chloride, AgCl.  What does this solution look like and what mass of silver chloride is in the solution? The molar solubility of AgCl is 1.3×10–5 and the molar mass is 143.32 g/mol.

The formation of hydrazine, N2H4, is: N2(g) + 2H2(g) ⇌ N2H4(l) This reaction has the energy diagram shown. Which change will increase the value of K?

What is the correct order of size (from largest to smallest) of K, K+, Ca, and Ca2+?

What are the Brønsted-Lowry acids in this reaction? NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH–(aq)

Which balanced thermochemical equation corresponds to the enthalpy of formation (ΔHfo) of carbon monoxide, CO(g)? The enthalpy of formation (ΔHfo) of CO(g) is –110.53 kJ/mol 

What mass of sodium hydroxide (NaOH, molar mass = 40.0 g/mol) is needed to make 100.0 mL of a 0.125 M NaOH solution?

A 1.0 L flask is filled with NO and O2 initially, and after the reaction establishes equilibrium, the flask is found to contain 0.0018 mol NO, 0.0012 mol O2 and 0.78 mol NO2. What is the value of the equilibrium constant, Kc, at this temperature? 2NO(g) + O2(g) ⇌ 2NO2(g)