Determine the mass of one drop of mercury by measuring the mass of 5 mL of mercury. Calculate the number of mercury molecules in one drop of mercury; m5 mL of Hg = 67.67 g. Assume 1 drop = 0.05 mL.

Motivation cannot be developed with practice; a person either possesses it or they do not.

What are the first three quantum numbers for the electrons located in subshell 2s?

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?