When collecting a gas over water, the gas is always a mixture of the gas collected and water vapor. a. True
b. False

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.

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-

What is the value of the standard enthalpy of formation of an element in its most stable form?