Hydrogen gas (h2) and oxygen gas (o2) react to form liquid hydrogen peroxide (h2o2). which statement is true about the reaction?
the product that is formed has the same physical properties as the reactants.

the atoms of the reactants have combined to form a new substance.

the same atoms are present, so the chemical properties are the same.

the two gases have mixed together, but a new substance has not formed.

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.