Word or symbol used to describe how data was measured

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.