A molecular electron configuration of σ22s-2s σ*22s-2s σ22p-2p π42p-2p π*42p-2p σ*12p-2p for a 1+ cation is for which two atoms in a molecule?

Name F in the pic below.(posterior view) 

What is the common order name of the taxon indicated?

Determine the oxidation state of nitrogen in KNO2.

Of the following substances which would you expect to have the highest vapor pressure? (i.e. the weakest intermolecular forces)

The following reaction is used to generate hydrogen gas over water in the laboratory. If 243 mL of gas is collected at 25°C and has a total pressure of 745 mm Hg, what mass of hydrogen is produced? A possibly useful table of water vapor pressures is provided below.                             Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g)                       T (°C)          P (mm Hg)                                                                                                             20                17.55                                                                                                             25                23.78                                                                                                              30                31.86

A 1.000 kg sample of nitroglycerine, C3H5N3O9, explodes and releases gases with a temperature of 1985°C at 1.100 atm. What is the volume of gas produced?                                                 C3H5N3O9(s) → CO2(g) + H2O(g) + N2(g) + O2(g) (unbalanced)

The cusps of the atrioventricular (AV) valves attach directly to:

Which of the following species has a pyramidal structure (molecular geometry)?

The best Lewis structure for sulfuric acid has zero formal charges, sulfur as the central atom, and no bonds between S and H. How many single and double bonds, respectively, are there in this Lewis structure?