The mass of the products of a chemical reaction will be

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

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.

Helium decays to form lithium. which equation correctly describes this decay?