A piece of zinc-copper alloy has a mass of 25 g. It was placed into a graduated cylinder and the volume of the water is increased by 3.2 mL. What is the density of the alloy ? (Write your answer two significant figure. e. g .: 2.5 ) g/cm^ 3

Ansa leaf changing color in autumn;

Van der waals forces are temporary electromagnetic forces established between uncharged atoms. some neutral molecules, when close together, can become temporarily “charged,” as electrons move around the atom. water is a polar molecule, the side of the molecule that the hydrogens bond to being more positive, and the opposite side bound to the lone pairs of electrons being more negative. this means that it participates in dipole-dipole interaction (non-polar exhibits dispersion forces), and it has the capacity for hydrogen bonding.