A thin glass tube 1m long is filled with Ar gas at 1 atm and the ends are stoppered with cotton plugs: HCl gas is introduced at one end of the tube, and simultaneously NH3 gas is introduced at the other end.  When the two gases meet, a solid ring of NH4Cl is formed. At which location: a, b, or c (noted above with arrows) does this ring form?

Which of the following ions has all identical bond lengths?

A Real Gas will behave most like an Ideal Gas under which conditions?

Which of these molecules is polar (has a net dipole moment)?

How many core electrons does an atom of P have?

Which of the following groups of substances are allotropes?

When solid CaCl2 dissolves in water, which of the following processes releases energy?

A 3.00 L sample of an ideal gas in a closed container at 25.0 ºC and 76.0 torr is heated to 300 ºC. What is the pressure (in torr) of the gas sample after heating?

In the resonance form of ozone (O3) shown below, what is the formal charge on the oxygen atom notated with an arrow?

Carbon exists in different elemental forms in nature, including diamond and graphite. These two forms of carbon are examples of                                .