What is the percent composition by mass of sulfur in the compound MgSO4 (gram formula mass = 120 g/mol)?

What semimetal can form four single covalent bonds.

Which of the following electromagnetic waves can create ions?

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.