I have an unknown quantity of gas in 31.0 L at 260 mmHg and 87° C, how many moles of gas do I have

What type of reaction fuels the processes seen here?

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.

Which of the following words describe the reality that the universe looks the same from various perspective