For which one of the following molecules is the indicated type of hybridization not appropriate for
m the central atom?

a. becl2 sp2
b. sih4 sp3
c. bf3 sp2
d. c2h2 sp
e. h2o sp3

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?