Based on the Lewis structure of acetaldehyde (CH₃CHO) choose the appropriate pair of molecular geometries of the two central atoms. 

Based on formal charge considerations, which of the following would likely be the correct arrangement of atoms in nitrosyl chloride: ClNO or ClON?

Using the bond energies in Table 7.2, determine the approximate enthalpy change for the following reaction:            CH4(g) + I2(g) –> CH3I(g) +HI(g)

Using the bond energies in Table 7.2, determine the approximate enthalpy change for the following reaction:                   H2C=CH2(g) + H2(g) –> H3CCH3(g)

Explain how σ and π bonds are similar and how they are different. To receive full credit you need to address electron density location. You may find a sketch would be helpful.

Use principles of atomic structure to answer each of the following: (a) The radius of the Ca atom is 197 pm; the radius of the Ca2+  ion is 99 pm. Account for the difference. (b) The lattice energy of CaO(s) is –3460 kJ/mol; the lattice energy of K2O is –2240 kJ/mol. Account for the difference. (c) Given these ionization values, explain the difference between Ca and K with regard to their first and second ionization energies. Element First Ionization Energy (kJ/mol) Second Ionization Energy (kJ/mol) K 419 3050 Ca 590 1140 (d) The first ionization energy of Mg is 738 kJ/mol and that of Al is 578 kJ/mol. Account for this difference. This is a four part question. To receive full credit you must address each part.

Using the bond energies in Table 7.2, determine the approximate enthalpy change for the following reaction:              2C2H6(g) + 7O2(g) –> 4CO2(g) + 6H2O(g)

What is the elimination half life of amiodarone?

What is the main function of the IABP?

Which drug antagonizes/reverses Midazolam (Versed)?