Sometimes we can see pollutants in water – such as floating trash. What pollutants might you not “see” in water but are dangerous to living things? * short answer please

You have 125g of a certain seasoning and are told that it contains 76.0 g of salt what is the percentage of salt by mass in this seasoning

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.