What is the total number of valence electrons in a germanium atom in the ground state

Does the energy in a solid increase or decrease when changing to a liquid?

If 90.0 grams of ethane reacted with excess chlorine, how many grams of dicarbon hexachloride would form

You wish to prepare a buffer consisting of acetic acid and sodium acetate with a total acetic acetate plus acetate concentration of 250 mm and a ph of 5. what concentrations of acetic acid and sodium acetate should you use