A gas cylinder has a temperature of -20.°C and pressure of 750. mmHg. If the volume of the cylinder is 14 liters, how many moles does it contain?

What is common about these molecules? a. their atoms are held together by covalent bonds. b. they are all made up of the same two atoms. c. their atoms are held together by ionic bonds. d. they are all made up of oxygen atoms only.

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.

From the choices provided below, list the reagent(s) in order that will react with cyclopentanone to form the compound shown below.