1. a plant extract can be obtained with organic solvents such as acetone or ethyl alcohol, and is composed of plant pigments such as chlorophyll a and b, carotene, and xanthophylls. write a brief explanation about why a plant extract is a mixture, whether it is homogeneous or heterogeneous, and how it can be separated.
2. a scientist has a sample of a substance that could be magnesium, sodium, stainless steel, or copper. name two properties the scientist could use to identify the substance, and explain why the scientist could use each property to identify the substance.