Which pure molecular substance will have the lowest vapor pressure at 25 oC?  Data sheet and Periodic Table

What element is oxidized and what is the oxidizing agent in the reaction below?                Fe2O3(s) + 3CO(g)2Fe(s) + 3CO2(g)  Data sheet and Periodic Table

Use the given heats of formation to calculate the enthalpy change for this reaction.B2O3(g) + 3COCl2(g)2BCl3(g) + 3CO2(g)ΔHof of B2O3(g) is –1272.8 kJ∙mol–1ΔHof of BCl3(g) is –403.8 kJ∙mol–1ΔHof of COCl2(g) is –218.8 kJ∙mol–1ΔHof of CO2(g) is –393.5 kJ∙mol–1   Data sheet and Periodic Table

Which pair of particles has the same number of electrons?   Data sheet and Periodic Table

What element is oxidized and what is the oxidizing agent in the reaction below?                Fe2O3(s) + 3CO(g)2Fe(s) + 3CO2(g)  Data sheet and Periodic Table

What is the molecular geometry around the N atom in the molecule depicted?           Data sheet and Periodic Table

How many sigma (σ) and pi (π) bonds are in the molecule shown?           Data sheet and Periodic Table

What is the hybridization of the indicated nitrogen atoms?                         Data sheet and Periodic Table

As shown in the figure, a reaction vessel initially contains hydrogen and oxygen.  Which figure best shows the reaction once complete?                2H2(g) + O2(g)2H2O(g)                        Data sheet and Periodic Table

Using formal charges, which Lewis dot structure is correct for the carbonate ion, CO32–?   Data sheet and Periodic Table