Is a glass of ice water a pure substance or a mixture?

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

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.