Author: Anonymous

What is the energy of a photon with a wavelength of 245 nm? 

Of the substances below, which will hydrogen bond with water?  

What amount of Al2O3 is produced from the reaction of 3.0 mol Al with 2.0 mol Fe2O3? 2Al + Fe2O3 → Al2O3 + 2Fe

For the reduction of silver with hydrogen: 2Ag+(aq) + H2(g) → 2H+(aq) + 2Ag(s) Given the thermodynamic data in the table, what is the standard change in Gibbs free energy for this reaction at 298 K?   ΔHfo / kJ∙mol–1 So / J∙mol–1∙K–1 Ag+(aq) 105.58 72.68 Ag(s) 0 42.55 H2(g) 0 130.68 H+(aq) 0 0  

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

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?

What is the limiting reactant when 10.0 g of carbon monoxide (CO, molar mass = 28.01 g/mol) and 15.0 g of iron(III) oxide (Fe2O3, molar mass = 159.70 g/mol) are allowed to react completely to form carbon dioxide (CO2) and iron (Fe).                         Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)

The figure represents the initial contents of a reaction vessel mixture of nitrogen monoxide (NO) and oxygen (O2) at a pressure of 1 atm. Keeping the volume and temperature constant, what are the final total pressure (Ptot) and partial pressure of nitrogen dioxide (PNO2) when the reaction is complete (assuming a 100% yield)? 2NO(g) + O2(g) → 2NO2(g)  

How many protons, neutrons, and electrons are in one atom of ?

Which aqueous solution will have the highest freezing point?