Which is true about the dissolving process in water?
a. polar solutes do not dissolve easily in water.
b. water molecules are attracted by solute ions at the surface of the solute.
c. water molecules move throughout the solute.
d. solute molecules pull water molecules away from the surface.

B. Water molecules are attracted by solute ions at the surface of the solute.

Explanation:

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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

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.