Methanol is the substance that can be broken down by chemical means, the remaining ones are elements.
CH3 is a methyl radical, which is formed by removing the hydrogen atom from methane, so the hybridization is SP^3
The two ways to measure the sand in a sand castle are by counting the number of pails of sand used to build the castle and by determining the mass of the sand used in building the castle. The first method makes use of the volume of the pail to determine the amount of sand while the second method is a more quantitative way.<span />