Density and solubility are similar because they both involve water, but they are different because density involves dissolving a material and solubility involves floating or sinking a material.
Density and solubility are similar because they both involve water, but they are different because density involves dissolving a material and solubility involves floating or sinking a material.
Crude oil is usually found below natural gas reservoirs, so the answer is C. Keep in mind, however, that this is not always the case, and that crude oil can be found above gas as well.
