Give the major force between ethanol and water. dipole-dipole dispersion hydrogen bonding ion-ion ion-dipole

Hydrogen bond.

Explanation:

Ethanol which has general formula of CnH2n+1OH; a polar –OH group, which hydrogen bonds to water hence, makes ethanol soluble. This -OH group undergoes an intermolecular attraction with water molecules forming Hydrogen bond with the Oxygen as well as the hydrogen.

Alkanols have a trend in which solubility decreases as the CnH2n+1-alkyl group increases. This is because the alkyl group is not water-soluble (hydrophobic) hence its inability to form hydrogen bond with individual water molecules.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3