Choose the letter of the choice that best completes the statement or answers the question.

Which of the elements listed below is a metal with 2 valence electrons?

a.

magnesium

c.

platinum

b.

uranium

d.

chlorine

Given the system at equilibrium: 2POCl3 (g) + energy 2PCl3 (g) + O2 (g) Which changes occur when O2 (g) is added tothis system? (1) The equilibrium shifts to the right and the concentration of PCl3 (g) increases.

If a thermometer indicates a temperature at 86F what's the equivalent temperature in the Celsius scale

Boron (B) : 1sE2sF2pG

At 1 atm, equal masses of H2O (s), H2O (ℓ), and H2O (g) have (1) the same density (2) the same distance between molecules (3) different volumes (4) different percent compositions

The first discovery, as opposed to first commercial application, of the water-soluble material used in contact lens is an example of:

A board measures 212 inches. How many feet is this?

Is neutralizing a base a chemical property

Polarity of a molecule depends on the polarity of individual bonds in that molecule. a. True b. False

What causes dipole interactions

What do holes in volcanic rock illustrate about the conditions in which