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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

Between two samples of helium and neon at the same temperature, which (if any) has the highest average kinetic energy and which (if any) has the highest average speed?   Data sheet and Periodic Table

How much heat is evolved or absorbed when 25.0 g of silver oxidizes to form silver oxide (Ag2O) under standard conditions? The enthalpy of formation (ΔHfo) of Ag2O is –31.05 kJ∙mol–1 and the molar mass of silver is 107.87 g∙mol–1.   Data sheet and Periodic Table

Which species has this ground-state electron arrangement?        1s2 2s2 2p6 3s2 3p6 3d10  Data sheet and Periodic Table

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

What is the molecular geometry around the N atom in the molecule depicted?           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

Which statement best describes the bond length(s) in the nitrite ion (shown)?  The bond length of N–O is 136 pm and N=O is 122 pm.          Data sheet and Periodic Table

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