3.a piece of jewelry is made up 18 k.it means that the jewelry is made up of_______.
a.18 parts is made up of copper and 6 parts is gold.
b.18 parts is made up of gold and 6 parts is copper.
c.9 parts is made up of gold and 9 parts is made up copper
d.18 of the jewelry is made up of finest gold suited for the purpose.
4.crystal of a solute were dissolved in warm water until most of them disappeared.what factor affect the solubility of the substance?
a.nature of the solute
b.stirring
c.temperature
d.size of the solute​