If a particular substance has a half-life of 8 years, what is the annual decay rate for this substance?

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

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.