Comparing metalic and covalent bonds in terms of nature of the bond

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(k=1.86 c/mol/kg for water and i=1 for sugar

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?