How is the structure around a given atom related to repulsion between valence electron pairs on the atom involved

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

Give the set of reactants (including an alkyl halide and a nucleophile) that could be used to synthesize the following ether: draw the molecules on the canvas by choosing buttons from the tools (for bonds and charges), atoms, and templates toolbars, including charges where needed. ch3ch2och2ch2chch3 | ch3

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel